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Commitments and Contingencies - Additional Information (Detail) (USD $)
 9 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
Sep. 30, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2012
Equity
Dec. 31, 2012
Adjustment to decrease legal expense
Dec. 31, 2013
Securities Action
Dec. 31, 2012
Securities Action
Dec. 31, 2012
Derivative Actions
Aug. 03, 2012
Derivative Actions
Dec. 31, 2012
Securities and Derivative Lawsuits
Dec. 31, 2012
Securities and Derivative Lawsuits
Minimum
Dec. 31, 2012
Securities and Derivative Lawsuits
Maximum
Dec. 31, 2013
Expenses
Dec. 31, 2013
Cancellation fee
Commitments and Contingencies [Line Items]                              
Operating lease rent expenses   $ 645,000 $ 675,000 $ 766,000                      
Settlement payment   16,000,000                       8,400,000 7,600,000
Required payment to class members and attorneys             16,000,000                
Number of common stock to be issued to class members and attorneys             2,777,778                
Closing bid price of common stock             $ 1.00                
Additional number of common stock to be issued to class members and attorneys             1,000,000                
Remittance by insurers into Escrow account               16,000,000              
Transfer of common stock into Escrow account               2,777,778              
Required payment by insurer to plaintiff                   800,000          
Additional number of common stock to be issued to plaintiff attorneys                   225,000          
Remittance by insurers into account established by plaintiffs' attorneys                 800,000            
Transfer of common stock into investment brokerage account                 225,000            
Loss Contingency settlement agreement cash consideration                     16,800,000        
Loss contingency settlement agreement stock consideration $ 8,600,000   $ 8,600,000   $ 6,500,000 $ 2,100,000         $ 7,700,000        
Loss contingency settlement agreement stock issuable 901,000   3,002,778         2,777,778 225,000   3,002,778        
Stock price used to forecast future liability $ 1.00                   $ 1.00        
Fair value assumption expected volatility rate 54.00%                   60.00%        
Fair value assumption risk free interest rate 0.10%                   0.16%        
Range of final judgment                       4 months 6 months