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Commitments and Contingencies - Additional Information (Detail) (USD $)
 0 Months Ended 12 Months Ended 0 Months Ended 6 Months Ended
Jun. 23, 2014
Dec. 31, 2013
Jun. 30, 2014
Jul. 08, 2014
Subsequent Event [Member]
Jul. 08, 2014
Subsequent Event [Member]
Unrestricted Shares [Member]
Jul. 17, 2014
Subsequent Event [Member]
Unrestricted Shares [Member]
Jun. 30, 2014
Secured Promissory Note [Member]
Jun. 30, 2014
September Fifteenth Two Thousand Eight [Member]
Jun. 30, 2014
September Eighteenth Two Thousand Eight [Member]
Loss Contingencies [Line Items]                  
Lawsuit filing date               September 15, 2008 September 18, 2008
Settlements on legal matters, common stock   $ 5,000,000     $ 5,000,000        
Settlements on legal matters, promissory notes   5,000,000   5,000,000          
Secured note interest rate percentage             5.00%    
Secured note maturity period             30 months    
Amount for share price fluctuation related to litigation settlement 725,000                
Probable relief in additional cash payment 725,000                
Asserted claims not accrued in financial 725,000                
Settlement funded by insurers for the Company   1,700,000              
Number of common stock for distribution to class members           2,407,318      
Accrual of payment in current liabilities   4,326,000 4,326,000            
Settlements on legal matters, cash   6,000,000              
Cash portion of the settlements, paid   $ 4,300,000   $ 4,300,000