Annual report pursuant to Section 13 and 15(d)

Stock-based Compensation - Summary of Stock Option Activity (Details)

v3.20.4
Stock-based Compensation - Summary of Stock Option Activity (Details) - 2014 Equity incentive plan
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2020
USD ($)
$ / shares
shares
Options Outstanding  
Outstanding at beginning of year (in shares) | shares 494
Granted (in shares) | shares 90
Exercised (in shares) | shares 0
Forfeited (in shares) | shares (26)
Expired (in shares) | shares (29)
Outstanding at end of year (in shares) | shares 529
Vested and expected to vest (in shares) | shares 529
Exercisable at year end (in shares) | shares 342
Weighted Average Exercise Price  
Outstanding at beginning of year (in dollars per share) | $ / shares $ 36.64
Granted (in dollars per share) | $ / shares 5.65
Exercised (in dollars per share) | $ / shares 0
Forfeited (in dollars per share) | $ / shares 26.59
Expired (in dollars per share) | $ / shares 41.25
Outstanding at end of year (in dollars per share) | $ / shares 31.62
Vested and expected to vest (in dollars per share) | $ / shares 31.62
Exercisable at year end (in dollars per share) | $ / shares $ 40.63
Weighted Average Remaining Contractual Life (Years), Ending Balance 7 years 4 months 6 days
Weighted Average Remaining Contractual Life (Years), Vested and expected to vest 7 years 4 months 6 days
Weighted Average Remaining Contractual Life (Years), Exercisable 6 years 8 months 15 days
Aggregate Intrinsic Value, Ending Balance | $ $ 42
Aggregate Intrinsic Value, Vested and expected to vest | $ 42
Aggregate Intrinsic Value, Exercisable | $ $ 24