Annual report pursuant to Section 13 and 15(d)

Stock-based Compensation - Option Activity (Details)

v3.3.1.900
Stock-based Compensation - Option Activity (Details)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2015
USD ($)
$ / shares
shares
Number of Shares Subject to Outstanding Options  
Outstanding, beginning of period (shares) | shares 3,480
Granted (shares) | shares 742
Exercised (shares) | shares (172)
Forfeited (shares) | shares (132)
Outstanding, end of period (shares) | shares 3,918
Options exercisable (shares) | shares 2,499
Options vested and expected to vest (shares) | shares 3,771
Weighted-average Exercise Price of Outstanding Options  
Outstanding, beginning of period (usd per share) | $ / shares $ 4.53
Granted (usd per share) | $ / shares 3.45
Exercised (usd per share) | $ / shares 1.68
Forfeited/Expired (usd per share) | $ / shares 3.58
Outstanding, end of period (usd per share) | $ / shares 4.49
Options exercisable (usd per share) | $ / shares 5.42
Options vested and expected to vest (usd per share) | $ / shares $ 4.54
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]  
Weighted average remaining contractual terms 6 years 4 months 28 days
Weighted average remaining contractual terms, exercisable options 5 years 2 months 12 days
Weighted average remaining contractual terms, vested and expected to vest options 6 years 3 months 22 days
Aggregate intrinsic value | $ $ 4,206
Aggregate intrinsic value, exercisable options | $ 2,252
Aggregate intrinsic value, options vested and expected to vest | $ $ 4,036