XML 47 R34.htm IDEA: XBRL DOCUMENT v2.4.0.6
Stock-Based Compensation Arrangements - Additional Information (Detail) (USD $)
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Share-based Awards Other than Options $ 287,000  
2004 Employee, Director and Consultant Stock Plan [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Granted,share 200,000  
Aggregate intrinsic value 1,843,780  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term 4 years  
Employee Stock Purchase Plan [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock purchase price 85.00%  
Stock Issued During Period, Shares, Employee Stock Purchase Plans 18,766 5,628
Weighted-average purchase price $ 0.26 $ 0.16
Weighted-average fair value $ 0.31 $ 0.19
Compensation expense $ 917 $ 1,163
Sharebased Compensation Arrangement By Sharebased Payment Award Purchase Price Of Common Stock Percent 85.00%