Stock Based Compensation - Summary of Changes in Company's Stock Options (Details) - Stock Options - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2020
Shares
Stock Options, Beginning Balance (in shares)	225,055
Stock Options, Granted (in shares)	32,937
Stock Options, Exercised (in shares)	(743)
Stock Options, Forfeited or expired (in shares)	(443)
Stock Options, Ending Balance (in shares)	256,806
Stock Options, Fully vested shares and shares expected (in shares)	256,806
Stock Options, Shares exercisable (in shares)	174,073
Weighted-Average Exercise Price
Weighted-Average Exercise Price, Beginning Balance (in dollars per share)	$ 24.10
Weighted-Average Exercise Price, Granted (in dollars per share)	24.66
Weighted-Average Exercise Price, Exercised (in dollars per share)	15.87
Weighted-Average Exercise Price, Forfeited or expired (in dollars per share)	38.75
Weighted-Average Exercise Price, Ending Balance (in dollars per share)	24.18
Weighted-Average Exercise Price, Fully vested shares and shares expected to vest (in dollars per share)	24.18
Weighted-Average Exercise Price, Shares exercisable (in dollars per share)	$ 21.48
Weighted-Average Remaining Contractual Term (In Years)
Weighted-Average Remaining Contractual Term, Outstanding	6 years 9 months 25 days
Weighted-Average Remaining Contractual Term, Fully vested shares and shares expected to vest	6 years 9 months 25 days
Weighted-Average Remaining Contractual Term, Shares exercisable	6 years 21 days
Aggregate Intrinsic Value (In Thousands)
Aggregate Intrinsic Value, Outstanding	$ 2,141
Aggregate Intrinsic Value, Fully vested shares and shares expected to vest	2,141
Aggregate Intrinsic Value, Shares exercisable	$ 1,859