Annual report pursuant to Section 13 and 15(d)

Non-Vested Options (Detail)

v3.3.1.900
Non-Vested Options (Detail) - Nonvested Shares
12 Months Ended
Dec. 31, 2015
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares  
Number of Restricted Shares, Beginning Balance | shares 1,255,667
Number of Restricted Shares, Shares Granted | shares 1,103,500
Number of Restricted Shares, Shares Vested | shares (666,500)
Number of Restricted Shares, Shares Forfeited | shares (346,334)
Number of Restricted Shares, Ending Balance | shares 1,346,333
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value  
Weighted Average Grant Date Fair Value Per Share, Beginning Balance | $ / shares $ 2.38
Weighted Average Grant Date Fair Value Per Share, Shares Granted | $ / shares 1.33
Weighted Average Grant Date Fair Value Per Share, Shares Vested | $ / shares 2.29
Weighted Average Grant Date Fair Value Per Share, Shares Forfeited | $ / shares 2.03
Weighted Average Grant Date Fair Value Per Share, Ending Balance | $ / shares $ 1.66