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 Warrant Activity (Detail)

v3.6.0.2
Stock Options, Stock Purchase Plan and Warrants - Summary of Warrant Activity (Detail) - Warrant [Member] - $ / shares
12 Months Ended
Jan. 09, 2012
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Warrants outstanding, beginning balance   650,000 650,000 1,358,333
Warrants, Granted 200,000 0 0 0
Warrants, Exercised   (200,000) 0 (458,333)
Warrants, Expired   0 0 (250,000)
Warrants, Cancelled   0 0 0
Warrants outstanding, ending balance   450,000 650,000 650,000
Warrants exercisable, ending balance   450,000    
Weighted Average Exercise Price Warrants outstanding, beginning balance   $ 1.48 $ 1.24 $ 1.24
Weighted average exercise price, granted $ 1.43 0 0 0
Weighted Average Exercised Price, Exercised   0 0 0
Weighted Average Exercised Price, Expired   $ 0 $ 0 $ 0
Weighted Average Exercised Price, Cancelled   0 0 0
Weighted Average Exercised Price, Warrants outstanding, ending balance   $ 1.48 $ 1.48 $ 1.24
Weighted Average Exercised Price, Warrants exercisable, ending balance   $ 1.49