| Guarantor and Non-Guarantor Financial Statements - Cash Flow Statement (Details) - USD ($)$ in Thousands
 | 3 Months Ended | 12 Months Ended | 
| Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2017 | Mar. 31, 2016 | Mar. 31, 2015 | 
| Cash flows from operating activities |  |  |  |  |  |  |  |  |  |  | 
| Net loss |  |  |  |  |  |  |  | $ (24,264) | $ (28,032) | $ (24,647) | 
| Adjustments to reconcile net loss to net cash used in operating activities: |  |  |  |  |  |  |  |  |  |  | 
| Depreciation and amortization |  |  |  |  |  |  |  | 8,170 | 10,974 | 2,108 | 
| Change in allowance for doubtful accounts |  |  |  |  |  |  |  | 133 | (234) | 698 | 
| Amortization of debt discount and debt issuance costs |  |  |  |  |  |  |  | 1,256 | 470 | 34 | 
| Accrued interest |  |  |  |  |  |  |  | 36 | 12 | 77 | 
| Fair value of financing costs related to conversion options |  |  |  |  |  |  |  |  |  | 0 | 
| Stock-based compensation |  |  |  |  |  |  |  | 3,748 | 5,095 | 5,850 | 
| Restricted shares and warrants compensation for services rendered |  |  |  |  |  |  |  | 398 | 867 | 490 | 
| Stock issued as settlement of a liability |  |  |  |  |  |  |  | 0 | 283 | 0 | 
| Impairment of intangible assets |  |  |  |  |  |  |  | 757 | 0 | 0 | 
| Change in fair value of convertible note embedded derivative liability |  |  |  |  |  |  |  | (475) | 0 | 0 | 
| Change in fair value of warrant liability |  |  |  |  |  |  |  | (147) | 0 | 0 | 
| Loss on extinguishment of debt | $ 0 | $ 293 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | 293 | 0 | 0 | 
| Stock issued as settlement of a liability |  |  |  |  |  |  |  |  | (283) |  | 
| (Increase) / decrease in assets: |  |  |  |  |  |  |  |  |  |  | 
| Restricted cash transferred to / (from) operating cash |  |  |  |  |  |  |  | (331) | 200 | 0 | 
| Accounts receivable |  |  |  |  |  |  |  | 833 | (5,111) | (406) | 
| Deposits |  |  |  |  |  |  |  | 92 | (104) | (63) | 
| Deferred tax assets |  |  |  |  |  |  |  | 148 | (418) | 3,156 | 
| Prepaid expenses and other current assets |  |  |  |  |  |  |  | 73 | 57 | (142) | 
| Increase / (decrease) in liabilities: |  |  |  |  |  |  |  |  |  |  | 
| Accounts payable |  |  |  |  |  |  |  | 4,568 | 7,308 | (379) | 
| Accrued license fees and revenue share |  |  |  |  |  |  |  | (1,093) | 2,789 | 2,988 | 
| Accrued compensation |  |  |  |  |  |  |  | (280) | (831) | 325 | 
| Other current liabilities |  |  |  |  |  |  |  | (879) | (394) | (4,589) | 
| Other non-current liabilities |  |  |  |  |  |  |  | (31) | 0 | 0 | 
| Intercompany movement of cash |  |  |  |  |  |  |  | 0 | 0 | 0 | 
| Net cash used in operating activities |  |  |  |  |  |  |  | (6,995) | (7,069) | (14,500) | 
| Cash flows from investing activities |  |  |  |  |  |  |  |  |  |  | 
| Capital expenditures |  |  |  |  |  |  |  | (1,595) | (1,549) | (67) | 
| Proceeds from sale of cost method investment in Sift |  |  |  |  |  |  |  | 999 | 0 | 0 | 
| Net cash proceeds from cost method investment in Sift |  |  |  |  |  |  |  | 0 | 875 | 0 | 
| Settlement of contingent liability |  |  |  |  |  |  |  | 0 | 0 | (49) | 
| Cash used in acquisition of assets |  |  |  |  |  |  |  | 0 | 0 | (2,125) | 
| Cash acquired with acquisition of subsidiary |  |  |  |  |  |  |  | 0 | 0 | 1,363 | 
| Net cash used in investing activities |  |  |  |  |  |  |  | (596) | (674) | (878) | 
| Cash flows from financing activities |  |  |  |  |  |  |  |  |  |  | 
| Cash received from issuance of convertible notes |  |  |  |  |  |  |  | 16,000 | 0 | 0 | 
| Repayment of debt obligations |  |  |  |  |  |  |  | (11,000) | (600) | 0 | 
| Payment of debt issuance costs |  |  |  |  |  |  |  | (2,383) | 0 | 0 | 
| Options exercised |  |  |  |  |  |  |  | 11 | 51 | 136 | 
| Stock issued for cash in stock offering, net |  |  |  |  |  |  |  | 0 | 12,627 | 0 | 
| Warrants exercised |  |  |  |  |  |  |  | 0 | 0 | 375 | 
| Net cash provided in financing activities |  |  |  |  |  |  |  | 2,628 | 12,078 | 511 | 
| Effect of exchange rate changes on cash |  |  |  |  |  |  |  | (119) | (173) | 131 | 
| Net change in cash |  |  |  |  |  |  |  | (5,082) | 4,162 | (14,736) | 
| Cash, beginning of period |  |  | 11,231 |  |  |  | 7,069 | 11,231 | 7,069 | 21,805 | 
| Cash, end of period |  |  |  | 11,231 |  |  |  | 6,149 | 11,231 | 7,069 | 
| Parent |  |  |  |  |  |  |  |  |  |  | 
| Cash flows from investing activities |  |  |  |  |  |  |  |  |  |  | 
| Proceeds from sale of cost method investment in Sift |  |  |  |  |  |  |  | 999 |  |  | 
| Net cash proceeds from cost method investment in Sift |  |  |  |  |  |  |  |  | 875 |  | 
| Parent | Reportable Legal Entities |  |  |  |  |  |  |  |  |  |  | 
| Cash flows from operating activities |  |  |  |  |  |  |  |  |  |  | 
| Net loss |  |  |  |  |  |  |  | (11,980) | (11,038) | (14,118) | 
| Adjustments to reconcile net loss to net cash used in operating activities: |  |  |  |  |  |  |  |  |  |  | 
| Depreciation and amortization |  |  |  |  |  |  |  | 14 | 9 | 12 | 
| Change in allowance for doubtful accounts |  |  |  |  |  |  |  | 0 | 0 | 0 | 
| Amortization of debt discount and debt issuance costs |  |  |  |  |  |  |  | 1,256 | 470 | 0 | 
| Accrued interest |  |  |  |  |  |  |  | 133 | 0 | 0 | 
| Fair value of financing costs related to conversion options |  |  |  |  |  |  |  |  |  | 0 | 
| Stock-based compensation |  |  |  |  |  |  |  | 3,748 | 5,095 | 5,850 | 
| Restricted shares and warrants compensation for services rendered |  |  |  |  |  |  |  | 398 | 867 |  | 
| Stock issued as settlement of a liability |  |  |  |  |  |  |  |  | 283 |  | 
| Impairment of intangible assets |  |  |  |  |  |  |  | 0 |  |  | 
| Change in fair value of convertible note embedded derivative liability |  |  |  |  |  |  |  | (475) |  |  | 
| Change in fair value of warrant liability |  |  |  |  |  |  |  | (147) |  |  | 
| Loss on extinguishment of debt |  |  |  |  |  |  |  | 0 |  |  | 
| (Increase) / decrease in assets: |  |  |  |  |  |  |  |  |  |  | 
| Restricted cash transferred to / (from) operating cash |  |  |  |  |  |  |  | (156) | 200 |  | 
| Accounts receivable |  |  |  |  |  |  |  | 25 | (24) | 0 | 
| Deposits |  |  |  |  |  |  |  | 0 | 9 | (9) | 
| Deferred tax assets |  |  |  |  |  |  |  | 148 | (418) | 3,156 | 
| Prepaid expenses and other current assets |  |  |  |  |  |  |  | (80) | (171) | (27) | 
| Increase / (decrease) in liabilities: |  |  |  |  |  |  |  |  |  |  | 
| Accounts payable |  |  |  |  |  |  |  | (233) | (797) | 1,323 | 
| Accrued license fees and revenue share |  |  |  |  |  |  |  | 0 | 0 | 0 | 
| Accrued compensation |  |  |  |  |  |  |  | 575 | (1,071) | 136 | 
| Other current liabilities |  |  |  |  |  |  |  | (1,091) | (398) | 2,319 | 
| Other non-current liabilities |  |  |  |  |  |  |  | (31) |  |  | 
| Intercompany movement of cash |  |  |  |  |  |  |  | (15,161) | (4,013) | (14,565) | 
| Net cash used in operating activities |  |  |  |  |  |  |  | (23,057) | (10,997) | (15,433) | 
| Cash flows from investing activities |  |  |  |  |  |  |  |  |  |  | 
| Capital expenditures |  |  |  |  |  |  |  | 0 | 0 | 0 | 
| Settlement of contingent liability |  |  |  |  |  |  |  |  |  | (49) | 
| Cash used in acquisition of assets |  |  |  |  |  |  |  |  |  | (2,125) | 
| Cash acquired with acquisition of subsidiary |  |  |  |  |  |  |  |  |  | 1,363 | 
| Net cash used in investing activities |  |  |  |  |  |  |  | 999 | 875 | (811) | 
| Cash flows from financing activities |  |  |  |  |  |  |  |  |  |  | 
| Cash received from issuance of convertible notes |  |  |  |  |  |  |  | 16,000 |  |  | 
| Repayment of debt obligations |  |  |  |  |  |  |  | 0 | 0 |  | 
| Payment of debt issuance costs |  |  |  |  |  |  |  | (407) |  |  | 
| Options exercised |  |  |  |  |  |  |  | 11 | 51 | 136 | 
| Stock issued for cash in stock offering, net |  |  |  |  |  |  |  |  | 12,627 |  | 
| Warrants exercised |  |  |  |  |  |  |  |  |  | 375 | 
| Net cash provided in financing activities |  |  |  |  |  |  |  | 15,604 | 12,678 | 511 | 
| Effect of exchange rate changes on cash |  |  |  |  |  |  |  | 0 | 0 | 0 | 
| Net change in cash |  |  |  |  |  |  |  | (6,454) | 2,556 | (15,733) | 
| Cash, beginning of period |  |  | 6,712 |  |  |  | 4,156 | 6,712 | 4,156 | 19,889 | 
| Cash, end of period |  |  |  | 6,712 |  |  |  | 258 | 6,712 | 4,156 | 
| Guarantor Subsidiaries | Reportable Legal Entities |  |  |  |  |  |  |  |  |  |  | 
| Cash flows from operating activities |  |  |  |  |  |  |  |  |  |  | 
| Net loss |  |  |  |  |  |  |  | (11,436) | (14,985) | (6,232) | 
| Adjustments to reconcile net loss to net cash used in operating activities: |  |  |  |  |  |  |  |  |  |  | 
| Depreciation and amortization |  |  |  |  |  |  |  | 6,227 | 10,203 | 1,100 | 
| Change in allowance for doubtful accounts |  |  |  |  |  |  |  | 68 | (234) | 698 | 
| Amortization of debt discount and debt issuance costs |  |  |  |  |  |  |  | 0 | 0 | 34 | 
| Accrued interest |  |  |  |  |  |  |  | (97) | 12 | 77 | 
| Fair value of financing costs related to conversion options |  |  |  |  |  |  |  |  |  | 0 | 
| Stock-based compensation |  |  |  |  |  |  |  | 0 | 0 | 0 | 
| Restricted shares and warrants compensation for services rendered |  |  |  |  |  |  |  | 0 | 0 |  | 
| Stock issued as settlement of a liability |  |  |  |  |  |  |  |  | 0 |  | 
| Impairment of intangible assets |  |  |  |  |  |  |  | 0 |  |  | 
| Change in fair value of convertible note embedded derivative liability |  |  |  |  |  |  |  | 0 |  |  | 
| Change in fair value of warrant liability |  |  |  |  |  |  |  | 0 |  |  | 
| Loss on extinguishment of debt |  |  |  |  |  |  |  | 293 |  |  | 
| (Increase) / decrease in assets: |  |  |  |  |  |  |  |  |  |  | 
| Restricted cash transferred to / (from) operating cash |  |  |  |  |  |  |  | (177) | 0 |  | 
| Accounts receivable |  |  |  |  |  |  |  | 1,533 | (5,044) | (350) | 
| Deposits |  |  |  |  |  |  |  | 12 | 5 | (96) | 
| Deferred tax assets |  |  |  |  |  |  |  | 0 | 0 | 0 | 
| Prepaid expenses and other current assets |  |  |  |  |  |  |  | 142 | 188 | (142) | 
| Increase / (decrease) in liabilities: |  |  |  |  |  |  |  |  |  |  | 
| Accounts payable |  |  |  |  |  |  |  | 4,701 | 11,789 | (1,924) | 
| Accrued license fees and revenue share |  |  |  |  |  |  |  | (1,236) | 2,789 | 3,033 | 
| Accrued compensation |  |  |  |  |  |  |  | (759) | 1,619 | 278 | 
| Other current liabilities |  |  |  |  |  |  |  | 714 | 675 | (7,227) | 
| Other non-current liabilities |  |  |  |  |  |  |  | 0 |  |  | 
| Intercompany movement of cash |  |  |  |  |  |  |  | 15,789 | (3,054) | 11,600 | 
| Net cash used in operating activities |  |  |  |  |  |  |  | 15,774 | 3,963 | 849 | 
| Cash flows from investing activities |  |  |  |  |  |  |  |  |  |  | 
| Capital expenditures |  |  |  |  |  |  |  | (1,595) | (1,549) | (67) | 
| Proceeds from sale of cost method investment in Sift |  |  |  |  |  |  |  | 0 |  |  | 
| Net cash proceeds from cost method investment in Sift |  |  |  |  |  |  |  |  | 0 |  | 
| Settlement of contingent liability |  |  |  |  |  |  |  |  |  | 0 | 
| Cash used in acquisition of assets |  |  |  |  |  |  |  |  |  | 0 | 
| Cash acquired with acquisition of subsidiary |  |  |  |  |  |  |  |  |  | 0 | 
| Net cash used in investing activities |  |  |  |  |  |  |  | (1,595) | (1,549) | (67) | 
| Cash flows from financing activities |  |  |  |  |  |  |  |  |  |  | 
| Cash received from issuance of convertible notes |  |  |  |  |  |  |  | 0 |  |  | 
| Repayment of debt obligations |  |  |  |  |  |  |  | (11,000) | (600) |  | 
| Payment of debt issuance costs |  |  |  |  |  |  |  | (1,976) |  |  | 
| Options exercised |  |  |  |  |  |  |  | 0 | 0 | 0 | 
| Stock issued for cash in stock offering, net |  |  |  |  |  |  |  |  | 0 |  | 
| Warrants exercised |  |  |  |  |  |  |  |  |  | 0 | 
| Net cash provided in financing activities |  |  |  |  |  |  |  | (12,976) | (600) | 0 | 
| Effect of exchange rate changes on cash |  |  |  |  |  |  |  | (336) | (173) | 131 | 
| Net change in cash |  |  |  |  |  |  |  | 867 | 1,641 | 913 | 
| Cash, beginning of period |  |  | 4,466 |  |  |  | 2,825 | 4,466 | 2,825 | 1,912 | 
| Cash, end of period |  |  |  | 4,466 |  |  |  | 5,333 | 4,466 | 2,825 | 
| Non-Guarantor Subsidiaries | Reportable Legal Entities |  |  |  |  |  |  |  |  |  |  | 
| Cash flows from operating activities |  |  |  |  |  |  |  |  |  |  | 
| Net loss |  |  |  |  |  |  |  | (848) | (2,009) | (4,297) | 
| Adjustments to reconcile net loss to net cash used in operating activities: |  |  |  |  |  |  |  |  |  |  | 
| Depreciation and amortization |  |  |  |  |  |  |  | 1,929 | 762 | 996 | 
| Change in allowance for doubtful accounts |  |  |  |  |  |  |  | 65 | 0 | 0 | 
| Amortization of debt discount and debt issuance costs |  |  |  |  |  |  |  | 0 | 0 | 0 | 
| Accrued interest |  |  |  |  |  |  |  | 0 | 0 | 0 | 
| Fair value of financing costs related to conversion options |  |  |  |  |  |  |  |  |  | 0 | 
| Stock-based compensation |  |  |  |  |  |  |  | 0 | 0 | 0 | 
| Restricted shares and warrants compensation for services rendered |  |  |  |  |  |  |  | 0 | 0 |  | 
| Stock issued as settlement of a liability |  |  |  |  |  |  |  |  | 0 |  | 
| Impairment of intangible assets |  |  |  |  |  |  |  | 757 |  |  | 
| Change in fair value of convertible note embedded derivative liability |  |  |  |  |  |  |  | 0 |  |  | 
| Change in fair value of warrant liability |  |  |  |  |  |  |  | 0 |  |  | 
| Loss on extinguishment of debt |  |  |  |  |  |  |  | 0 |  |  | 
| (Increase) / decrease in assets: |  |  |  |  |  |  |  |  |  |  | 
| Restricted cash transferred to / (from) operating cash |  |  |  |  |  |  |  | 2 | 0 |  | 
| Accounts receivable |  |  |  |  |  |  |  | (725) | (43) | (56) | 
| Deposits |  |  |  |  |  |  |  | 80 | (118) | 42 | 
| Deferred tax assets |  |  |  |  |  |  |  | 0 | 0 | 0 | 
| Prepaid expenses and other current assets |  |  |  |  |  |  |  | 11 | 40 | 27 | 
| Increase / (decrease) in liabilities: |  |  |  |  |  |  |  |  |  |  | 
| Accounts payable |  |  |  |  |  |  |  | 100 | (3,684) | 222 | 
| Accrued license fees and revenue share |  |  |  |  |  |  |  | 143 | 0 | (45) | 
| Accrued compensation |  |  |  |  |  |  |  | (96) | (1,379) | (89) | 
| Other current liabilities |  |  |  |  |  |  |  | (502) | (671) | 319 | 
| Other non-current liabilities |  |  |  |  |  |  |  | 0 |  |  | 
| Intercompany movement of cash |  |  |  |  |  |  |  | (628) | 7,067 | 2,965 | 
| Net cash used in operating activities |  |  |  |  |  |  |  | 288 | (35) | 84 | 
| Cash flows from investing activities |  |  |  |  |  |  |  |  |  |  | 
| Capital expenditures |  |  |  |  |  |  |  | 0 | 0 | 0 | 
| Proceeds from sale of cost method investment in Sift |  |  |  |  |  |  |  | 0 |  |  | 
| Net cash proceeds from cost method investment in Sift |  |  |  |  |  |  |  |  | 0 |  | 
| Settlement of contingent liability |  |  |  |  |  |  |  |  |  | 0 | 
| Cash used in acquisition of assets |  |  |  |  |  |  |  |  |  | 0 | 
| Cash acquired with acquisition of subsidiary |  |  |  |  |  |  |  |  |  | 0 | 
| Net cash used in investing activities |  |  |  |  |  |  |  | 0 | 0 | 0 | 
| Cash flows from financing activities |  |  |  |  |  |  |  |  |  |  | 
| Cash received from issuance of convertible notes |  |  |  |  |  |  |  | 0 |  |  | 
| Repayment of debt obligations |  |  |  |  |  |  |  | 0 | 0 |  | 
| Payment of debt issuance costs |  |  |  |  |  |  |  | 0 |  |  | 
| Options exercised |  |  |  |  |  |  |  | 0 | 0 | 0 | 
| Stock issued for cash in stock offering, net |  |  |  |  |  |  |  |  | 0 |  | 
| Warrants exercised |  |  |  |  |  |  |  |  |  | 0 | 
| Net cash provided in financing activities |  |  |  |  |  |  |  | 0 | 0 | 0 | 
| Effect of exchange rate changes on cash |  |  |  |  |  |  |  | 217 | 0 | 0 | 
| Net change in cash |  |  |  |  |  |  |  | 505 | (35) | 84 | 
| Cash, beginning of period |  |  | $ 53 |  |  |  | $ 88 | 53 | 88 | 4 | 
| Cash, end of period |  |  |  | $ 53 |  |  |  | $ 558 | $ 53 | $ 88 |