Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Restricted Stock Activity (Detail)

v3.3.1.900
Stockholders' Equity - Restricted Stock Activity (Detail)
12 Months Ended
Dec. 31, 2015
$ / shares
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Number of shares, Restricted stock granted 1,950,000
Number of shares, Restricted stock vested (366,666)
Number of shares, Restricted units cancelled (1,250,000)
Number of shares, Unvested balance 333,334
Restricted Stock [Member]  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Number of shares, Unvested balance 8,287,384
Number of shares, Restricted stock granted 200,000
Number of shares, Restricted stock vested (816,449)
Number of shares, Restricted stock units granted 1,422,000
Number of shares, Restricted units cancelled (10,000)
Number of shares, Restricted stock units vested (325,000)
Number of shares, Unvested balance 8,757,935
Weighted average grant price, Unvested balance | $ / shares $ 2.33
Weighted average grant price, Restricted stock granted | $ / shares 3.04
Weighted average grant price, Restricted stock vested | $ / shares 2.69
Weighted average grant price, Restricted stock units granted | $ / shares 3.57
Weighted average grant price, Restricted stock units cancelled | $ / shares 3.04
Weighted average grant price, Restricted stock units vested | $ / shares 3.56
Weighted average grant price, Unvested balance | $ / shares $ 2.47