Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Stock Option Activity (Detail)

v3.2.0.727
Stockholders' Equity - Stock Option Activity (Detail) - USD ($)
$ / shares in Units, shares in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2015
Dec. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Number of shares,Outstanding at December 31, 2014 2,164,365  
Number of Shares, Options granted 0  
Number of Shares, Options exercised (100,000)  
Number of Shares,Options cancelled 0  
Number of Shares, Outstanding at March 31, 2015 2,064,365 2,164,365
Number of Shares, Options vested and exercisable 1,747,698  
Weighted Average Exercise Price,Outstanding at December 31, 2014 $ 4.69  
Weighted Average Exercise Price, Options granted 0  
Weighted Average Exercise Price, Options exercised 2.15  
Weighted Average Exercise Price,Options cancelled 0  
Weighted Average Exercise Price, Outstanding at March 31, 2015 4.82 $ 4.69
Weighted Average Exercise Price, Options vested and expected to vest $ 4.75  
Total Weighted Average Intrinsic Value,Outstanding at December 31, 2014 $ 0  
Total Weighted Average Intrinsic Value,Options exercised 1,210  
Total Weighted Average Intrinsic Value, Options vested and exercisable $ 0  
Weighted Average Remaining Contractual Life, Outstanding 7 years 2 months 12 days 7 years 4 months 17 days
Weighted Average Remaining Contractual Life, Options vested and exercisable 6 years 9 months 14 days