Stock Based Compensation - Share Based Compensation Activity (Details) shares in Thousands	9 Months Ended
	Sep. 30, 2020 $ / shares shares
Options Outstanding
Beginning balance (in shares) | shares	410
Granted (in shares) | shares	619
Exercised (in shares) | shares	(25)
Canceled/forfeited (in shares) | shares	(15)
Ending balance (in shares) | shares	989
Weighted Average Exercise Price
Beginning balance (in dollars per share) | $ / shares	$ 14.50
Granted (in dollars per share) | $ / shares	13.82
Exercised (in dollars per share) | $ / shares	10.29
Canceled/forfeited (in dollars per share) | $ / shares	19.02
Ending balance (in dollars per share) | $ / shares	$ 14.11
Restricted Stock Awards
Restricted Stock and RSU Awards Outstanding
Beginning balance (in shares) | shares	171
Granted (in shares) | shares	21
Vested (in shares) | shares	(28)
Forfeited and cancelled (in shares) | shares	(77)
Beginning balance (in shares) | shares	87
Weighted Average Award Value
Beginning balance (in dollars per share) | $ / shares	$ 23.53
Granted (in dollars per share) | $ / shares	29.19
Vested (in dollars per share) | $ / shares	24.37
Forfeited and canceled (in dollars per share) | $ / shares	24.16
Ending balance (in dollars per share) | $ / shares	$ 24.09
RSU Awards
Restricted Stock and RSU Awards Outstanding
Beginning balance (in shares) | shares	0
Granted (in shares) | shares	375
Vested (in shares) | shares	0
Forfeited and cancelled (in shares) | shares	0
Beginning balance (in shares) | shares	375
Weighted Average Award Value
Beginning balance (in dollars per share) | $ / shares	$ 0
Granted (in dollars per share) | $ / shares	13.24
Vested (in dollars per share) | $ / shares	0
Forfeited and canceled (in dollars per share) | $ / shares	0
Ending balance (in dollars per share) | $ / shares	$ 13.24