Stock-based Compensation - Schedule of Restricted Stock and Restricted Stock units Activity (Details) - $ / shares	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2020
Restricted stock
NUMBER OF SHARES
Beginning balance (in shares)		754,415
Granted (in shares)		424,613
Vested (in shares)		(267,872)
Cancelled (in shares)	(43,071)	(101,629)
Ending balance (in shares)		809,527
WEIGHTED AVERAGE FAIR VALUE PER SHARE
RSAs and RSUs outstanding, weighted average exercise price, beginning (in dollars per share)		$ 43.07
Granted, weighted average exercise price (in dollars per share)		14.37
Vested, Weighted average exercise price (in dollars per share)		42.85
Cancelled, weighted average exercise price (in dollars per share)		35.65
RSAs and RSUs outstanding, weighted average exercise price, ending (in dollars per share)		$ 29.03
Nonvested restricted stock units
NUMBER OF SHARES
Beginning balance (in shares)		41,811
Granted (in shares)		85,305
Vested (in shares)		(12,567)
Cancelled (in shares)		(7,367)
Ending balance (in shares)	43,071	107,182
WEIGHTED AVERAGE FAIR VALUE PER SHARE
RSAs and RSUs outstanding, weighted average exercise price, beginning (in dollars per share)		$ 19.22
Granted, weighted average exercise price (in dollars per share)		12.76
Vested, Weighted average exercise price (in dollars per share)		19.22
Cancelled, weighted average exercise price (in dollars per share)		14.03
RSAs and RSUs outstanding, weighted average exercise price, ending (in dollars per share)		$ 14.43