|
Convertible Notes - Additional Information (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified |
6 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 1 Months Ended | 6 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Sep. 30, 2012
|
Sep. 30, 2011
|
Jun. 30, 2012
|
Mar. 31, 2012
|
Jun. 21, 2010
Amended ValueAct Note
|
Dec. 29, 2011
Taja Convertible Note
|
Mar. 31, 2012
Taja Convertible Note
|
Mar. 19, 2012
Amended Taja Convertible Note
|
Jun. 30, 2012
Amended Taja Convertible Note
|
Sep. 30, 2012
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
|
Sep. 30, 2012
Coverage Warrant
|
Sep. 30, 2012
Incentive Warrant
|
Sep. 30, 2012
Conversion Warrants
|
|
| Non Cash Convertible Debt Related Expense [Line Items] | |||||||||||||||||
| Principal amount of note | $ 3,500 | $ 500 | $ 1,204 | $ 3,000 | |||||||||||||
| 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 | 2,000 | ||||||||||||||||
| Warrant, exercise price per share | 0.70 | 0.25 | |||||||||||||||
| Percentage of warrant coverage | 25.00% | ||||||||||||||||
| Warrant Term | 5 years | ||||||||||||||||
| Warrant vesting period from issue date | 1 year | ||||||||||||||||
| Gain (loss) on extinguishment of debt | 1,459 | 1,346 | |||||||||||||||
| Conversion Price | $ 0.70 | $ 0.70 | |||||||||||||||
| 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 | ||||||||||||||||
| 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 | 2,600 | ||||||||||||||||
| Convertible note, amount converted | 1,820 | ||||||||||||||||
| Interest expense of related to the amortization of the debt discount | 712 | 418 | 295 | ||||||||||||||
| Discount on notes | 242 | 0 | 832 | ||||||||||||||
| Shares of common stock, issuable up on conversion | 1,720,568 | ||||||||||||||||
| Amount by which if-converted value exceeds the principal | $ 206 | ||||||||||||||||