Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Stock Options, Stock Purchase Plan and Warrants - Summary of Information on Warrants Outstanding (Detail)

v3.3.1.900
Stock Options, Stock Purchase Plan and Warrants - Summary of Information on Warrants Outstanding (Detail) - $ / shares
12 Months Ended
Dec. 31, 2015
May. 03, 2010
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Number outstanding 650,000  
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 1.48 $ 1.50
Warrant One [Member]    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Number outstanding 450,000  
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 1.50  
Issued May 03, 2010  
Expired May 02, 2017  
Warrants Two [Member]    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Number outstanding 200,000  
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 1.43  
Issued Jan. 12, 2012  
Expired Jan. 12, 2017