Quarterly report pursuant to sections 13 or 15(d)

Convertible Notes - Additional Information (Detail)

v2.4.0.6
Convertible Notes - Additional Information (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
9 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 9 Months Ended 12 Months Ended 1 Months Ended 9 Months Ended
Dec. 31, 2012
Dec. 31, 2011
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
Dec. 31, 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
Dec. 31, 2012
Coverage Warrant
Dec. 31, 2012
Incentive Warrant
Dec. 31, 2012
Conversion Warrants
Non Cash Convertible Debt Related Expense [Line Items]                              
Principal amount of note       $ 3,500 $ 500     $ 1,213             $ 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   1,079       1,459     1,346            
Conversion price               $ 0.70   $ 0.70          
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             2,600                
Convertible note, amount converted             1,820                
Interest expense of related to the amortization of the debt discount 1,070 686           443              
Discount on notes 198   0         684              
Shares of common stock, issuable up on conversion               1,733,376              
Amount by which if-converted value exceeds the principal               $ 86