Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Detail)

v3.7.0.1
Stock-Based Compensation (Detail)
6 Months Ended
Jun. 30, 2017
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Shares, Options granted 1,413,904
Weighted Average Exercise Price Per share, End of year | $ / shares $ 2.04
Restricted Stock  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Shares Available for Grant, Beginning of year 175,046
Shares Available For Grant, Options granted 0
Shares Available For Grant, Options forfeited 0
Shares Available For Grant, Options expired 27,744
Shares Available for Grant, End of year 202,290
Number of Shares, Beginning of Year 514,772
Number of Shares, Options granted 0
Number Of Shares, Options forfeited 0
Number Of Shares, Options expired (27,744)
Number of Shares, End of Year 487,528
Number of Shares, Total vested and expected to vest shares (options) 487,528
Number of Shares, Total vested shares (options) 237,520
Weighted Average Exercise Price Per share, Beginning of year | $ / shares $ 2.77
Weighted Average Exercise Price Per Share, Options granted | $ / shares 0
Weighted Average Exercise Price Per Share, Options forfeited | $ / shares 0
Weighted Average Exercise Price Per Share, Options expired | $ / shares 15.80
Weighted Average Exercise Price Per share, End of year | $ / shares 2.04
Weighted Average Exercise Price Per Share, Total vested and expected to vest shares (options) | $ / shares 2.04
Weighted Average Exercise Price Per Share, Total vested shares (options) | $ / shares $ 2.45