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Convertible Notes - Additional Information (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified |
3 Months Ended | 6 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Sep. 30, 2013
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Sep. 30, 2013
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May 31, 2013
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Mar. 31, 2013
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Dec. 29, 2011
Taja Convertible Note
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Mar. 31, 2012
Taja Convertible Note
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Mar. 19, 2012
Amended Taja Convertible Note
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Mar. 31, 2012
Amended Taja Convertible Note
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Mar. 01, 2012
Amended Taja Convertible Note
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Mar. 01, 2012
Amended Taja Convertible Note
Maximum
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Mar. 01, 2012
Amended Taja Convertible Note
Minimum
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Sep. 04, 2013
Second Amended Taja Convertible and Non-Convertible Notes
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Aug. 14, 2013
Second Amended Taja Convertible and Non-Convertible Notes
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Mar. 31, 2012
Coverage Warrant
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Mar. 31, 2012
Incentive Warrant
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Mar. 31, 2012
Conversion Warrants
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Aug. 14, 2013
Inducement Shares
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Aug. 14, 2013
Inducement Warrants
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| Non Cash Convertible Debt Related Expense [Line Items] | ||||||||||||||||||
| Principal amount of note, stripped out | $ 3,000 | |||||||||||||||||
| Principal amount of note | 500 | 3,000 | ||||||||||||||||
| Accrued interest | 562 | |||||||||||||||||
| Total amount of debt | 1,062 | |||||||||||||||||
| Issuance of warrants related to convertible debt | 476,000 | 400,000 | 80,000 | 120,000 | ||||||||||||||
| Warrant, exercise price per share | 3.50 | 1.25 | ||||||||||||||||
| Percentage of warrant coverage | 25.00% | |||||||||||||||||
| Warrant Term | 5 years | 5 years | ||||||||||||||||
| Warrant vesting period from issue date | 1 year | 1 year | ||||||||||||||||
| Gain (loss) on extinguishment of debt | (442) | (442) | 1,459 | |||||||||||||||
| Conversion price | $ 3.50 | $ 4.00 | ||||||||||||||||
| Conversion of the note, ownership percentage by holder | 4.90% | |||||||||||||||||
| Net proceeds | 10,000 | |||||||||||||||||
| Fair value of embedded conversion feature of convertible note | 2,250 | |||||||||||||||||
| Fair value of convertible note warrant | 750 | 1,459 | ||||||||||||||||
| Excess face value charge as interest expense | 235 | 837 | ||||||||||||||||
| Shares of common stock issued up on conversion | 248,000 | 2,600,000 | 285,714 | |||||||||||||||
| Convertible note, amount converted | 1,820 | 1,000 | ||||||||||||||||
| Discount on Notes | 762 | 762 | 159 | 72 | ||||||||||||||
| Repayment of remaining principal and interest | $ 1,542 | |||||||||||||||||