Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Stock Option Activity (Detail)

v3.4.0.3
Stockholders' Equity - Stock Option Activity (Detail) - USD ($)
 3 Months Ended 12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
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 1,500,000  
Number of shares, Options vested and expected to vest 1,779,365   1,779,365
Number of shares, Options vested and exercisable 1,082,168    
Weighted Average Exercise Price, Options vested and expected to vest $ 4.37    
Weighted Average Exercise Price, Options granted 0    
Weighted Average Exercise Price, Options vested and expected to vest 4.37   $ 4.37
Weighted Average Exercise Price, Options vested and exercisable $ 3.75    
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 vested and expected to vest 853,984   $ 666,396
Total Weighted Average Intrinsic Value, Options vested and exercisable $ 805,651    
Weighted Average Remaining Contractual Life, Options vested and expected to vest 6 years 25 days   6 years 3 months 25 days
Weighted Average Remaining Contractual Life, Options vested and exercisable 5 years 7 months 13 days