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Convertible Notes - Additional Information (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified |
12 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Mar. 31, 2013
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Mar. 31, 2012
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Jan. 31, 2013
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Dec. 31, 2012
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Jun. 30, 2012
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Jun. 21, 2010
Amended ValueAct Note
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Mar. 19, 2012
Amended Taja Convertible Note
|
Mar. 31, 2013
Amended Taja Convertible Note
|
Mar. 31, 2012
Amended Taja Convertible Note
|
Mar. 01, 2012
Amended Taja Convertible Note
|
Mar. 01, 2012
Amended Taja Convertible Note
Maximum
|
Mar. 01, 2012
Amended Taja Convertible Note
Minimum
|
Mar. 31, 2012
Coverage Warrant
|
Mar. 31, 2012
Incentive Warrant
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Mar. 31, 2012
Conversion Warrants
|
Dec. 29, 2011
Taja Convertible Note
|
Mar. 31, 2012
Taja Convertible Note
|
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| Non Cash Convertible Debt Related Expense [Line Items] | |||||||||||||||||
| Principal amount of note | $ 3,500 | $ 1,222 | $ 3,000 | $ 500 | |||||||||||||
| Principal amount of note, stripped out | 3,000 | ||||||||||||||||
| Accrued interest | 562 | ||||||||||||||||
| Total amount of debt | 1,062 | ||||||||||||||||
| Warrant issued as consideration for amending the note | 400 | ||||||||||||||||
| Warrant, exercise price per share | 3.50 | 3.50 | 3.50 | 1.25 | |||||||||||||
| Percentage of warrant coverage | 25.00% | ||||||||||||||||
| Warrant Term | 5 years | ||||||||||||||||
| Warrant vesting period from issue date | 1 year | ||||||||||||||||
| Gain (loss) on extinguishment of debt | 2,004 | 1,346 | 1,459 | ||||||||||||||
| Conversion price | $ 3.50 | $ 3.50 | |||||||||||||||
| Conversion of the note, ownership percentage by holder | 4.90% | ||||||||||||||||
| Net proceeds | 7,000 | 10,000 | |||||||||||||||
| Fair value of embedded conversion feature of convertible note | 2,250 | ||||||||||||||||
| Expected life | 1 year | 5 years | |||||||||||||||
| Risk free interest rate | 0.17% | 0.84% | |||||||||||||||
| Dividend yield | 0.00% | 0.00% | |||||||||||||||
| Volatility | 175.00% | 175.00% | |||||||||||||||
| Fair value of convertible note warrant | 750 | 1,459 | |||||||||||||||
| Excess face value charge as interest expense | 837 | ||||||||||||||||
| Shares of common stock issued up on conversion | 520,000 | ||||||||||||||||
| Convertible note, amount converted | 1,820 | ||||||||||||||||
| Interest expense of related to the amortization of the debt discount | 1,420 | 9,709 | 588 | ||||||||||||||
| Discount on Notes | 159 | 0 | 539 | ||||||||||||||
| Shares of common stock, issuable up on conversion | 349,275 | ||||||||||||||||
| Amount by which if-converted value exceeds the principal | $ 402 | ||||||||||||||||