Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Stock Option Activity (Detail)

v3.5.0.2
Stockholders' Equity - Stock Option Activity (Detail) - USD ($)
 6 Months Ended 12 Months Ended
Jun. 30, 2016
Dec. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Number of shares, Options vested and expected to vest 1,779,365  
Number of shares, Options granted 0  
Number of shares, Options Forfeited (25,000)  
Number of shares, Options vested and expected to vest 1,754,365 1,779,365
Number of shares, Options vested and exercisable 1,065,501  
Weighted Average Exercise Price, Options vested and expected to vest $ 4.37  
Weighted Average Exercise Price, Options granted 0  
Weighted Average Exercise Price, Options Forfeited 2.10  
Weighted Average Exercise Price, Options vested and expected to vest 4.41 $ 4.37
Weighted Average Exercise Price, Options vested and exercisable $ 3.77  
Total Weighted Average Intrinsic Value, Options vested and expected to vest $ 666,396  
Total Weighted Average Intrinsic Value, Options granted 0  
Total Weighted Average Intrinsic Value, Options Forfeited 0  
Total Weighted Average Intrinsic Value, Options vested and expected to vest 597,262 $ 666,396
Total Weighted Average Intrinsic Value, Options vested and exercisable $ 573,662  
Weighted Average Remaining Contractual Life, Options vested and expected to vest 5 years 9 months 18 days 6 years 3 months 25 days
Weighted Average Remaining Contractual Life, Options vested and exercisable 5 years 4 months 2 days