Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Stock Compensation - Summary of Warrant Activity (Detail)

v3.10.0.1
Stock Compensation - Summary of Warrant Activity (Detail) - Warrant - $ / shares
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of shares, outstanding 450,000 650,000
Number of shares, granted 0 0
Number of shares, exercised (450,000) (200,000)
Number of shares, expired/cancelled 0 0
Number of shares, outstanding 0 450,000
Weighted average exercise price, outstanding (in dollars per share) $ 1.50 $ 1.48
Weighted average exercise price, granted (in dollars per share) 0 0
Weighted average exercise price, exercised (in dollars per share) 1.50 0
Weighted average exercise price, exercised/cancelled (in dollars per share) 0 0
Weighted average exercise price, outstanding (in dollars per share) $ 0 $ 1.50