XML 25 R54.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Stockholders' Equity (Summary of Performance-Based RSUs Activity) (Details) - Performance-Based Restricted Stock Units (RSUs) [Member]
shares in Thousands
12 Months Ended
Dec. 31, 2019
$ / shares
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Number of shares, outstanding at December 31, 2018 | shares 586
Number of shares, granted | shares
Number of shares, vested | shares (204)
Number of shares, forfeited | shares (244)
Number of shares, Unvested outstanding at December 31, 2019 | shares 138
Weighted average grant date fair value, outstanding at December 31, 2018 | $ / shares $ 2.58
Weighted average grant date fair value, granted | $ / shares
Weighted average grant date fair value, vested | $ / shares 2.57
Weighted average grant date fair value, forfeited | $ / shares 2.57
Weighted average grant date fair value, Unvested outstanding at December 31, 2019 | $ / shares $ 2.63