Annual report pursuant to Section 13 and 15(d)

Stock Warrants (Additional Information) (Detail)

v3.6.0.2
Stock Warrants (Additional Information) (Detail) - $ / shares
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Class of Warrant or Right [Line Items]    
Weighted average term of warrants 1 year 3 months 18 days  
Weighted average exercise price of warrants per share $ 2.41  
Class Of Warrant Or Right Issued   60,000
Class Of Warrant Or Right Grants In Period 0 60,000
Class of Warrant or Right, Number of Securities Called by Warrants or Rights   3,559,783
Stock Issued During Period, Shares, Warrant Exercised 74,621  
Class Of Warrant Exercised In Cashless Basis   4,178,267
Class Of Warrant Exercised In Cash Basis 111,232  
Warrants 1    
Class of Warrant or Right [Line Items]    
Stock Issued During Period, Shares, Warrant Exercised 60,750  
Class Of Warrant Exercised In Cash Basis 22,000