Share-Based Compensation - Options (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Number of Shares
Options outstanding, beginning balance (in shares)	380,180	234,959	1,250
Granted (in shares)	233,888	145,221	234,959
Exercised (in shares)	(17,856)		(1,250)
Forfeitures (in shares)	(11,747)
Options outstanding, ending balance (in shares)	584,465	380,180	234,959
Weighted Average Exercise Price
Options outstanding, beginning balance (in dollars per share)	$ 26.01	$ 22.31	$ 9.69
Granted (in dollars per share)	20.92	31.99	22.31
Exercised (in dollars per share)	22.31		9.69
Options outstanding, ending balance (in dollars per share)	$ 23.96	$ 26.01	$ 22.31
Options outstanding, aggregate intrinsic value	$ 6,625	$ 7,087	$ 867
Options outstanding, weighted average remaining contractual term	8 years 3 months 7 days	8 years 7 months 6 days	9 years 3 months
Options Vested and Exercisable
Number of shares (in shares)	189,228
Weighted average exercise price (in dollars per share)	$ 24.59
Aggregate intrinsic value	$ 2,027
Options vested and exercisable, weighted average remaining contractual term	7 years 5 months 19 days
Stock Options
Weighted Average Exercise Price
Forfeited (in dollars per share)	$ 31.99
Options Vested and Exercisable
Unrecognized compensation expense	$ 2,200
Weighted-average period for recognition of compensation cost	1 year 8 months 15 days
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected option term (in years)	6 years	6 years	6 years
Expected stock price volatility	44.68%	39.87%	33.02%
Expected dividend yield	0.00%	0.00%	0.00%
Risk-free interest rate	0.51%	2.46%	2.62%