Annual report pursuant to Section 13 and 15(d)

Stock-based Compensation (Details 4)

v3.8.0.1
Stock-based Compensation (Details 4) - Restricted Stock Units (RSUs) [Member]
shares in Thousands
 12 Months Ended
Dec. 31, 2017
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]  
Unvested - Number of Shares | shares 0
Granted - Number of Shares | shares 760
Vested - Number of Shares | shares (132)
Forfeited - Number of Shares | shares (11)
Unvested - Number of Shares | shares 617
Unvested - Weighted Average Grant - Date Fair Value | $ / shares $ 1.65
Granted - Weighted Average Grant - Date Fair Value | $ / shares 1.63
Vested - Weighted Average Grant - Date Fair Value | $ / shares 1.59
Forfeited - Weighted Average Grant - Date Fair Value | $ / shares 1.25
Unvested - Weighted Average Grant - Date Fair Value | $ / shares $ 0