Stock-Based Compensation - Information About Stock Options Outstanding and Exercisable (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Number of Shares Outstanding [Roll Forward]
Option Balances, beginning of period (in shares)	78,379
Options Exercised (in shares)	(20,329)
Option Balances, end of period (in shares)	58,050	78,379
Options Exercisable end of period (in shares)	38,123
Options, Weighted Average Exercise Price [Roll Forward]
Option Balances, beginning of period (in dollars per share)	$ 7.43
Options Exercised (in dollars per share)	4.21
Option Balances, end of period (in dollars per share)	8.56	$ 7.43
Options Exercisable, end of period (in dollars per share)	6.80
Weighted Average Grant Date Fair Value [Roll Forward]
Option Balances, beginning of period	2.00
Options Exercised	0.98
Option Balances, end of period	2.37	$ 2.00
Options Exercisable, end of period	$ 1.66
Options, Additional Disclosures [Abstract]
Weighted average years remaining, outstanding	2 years 6 months	2 years 8 months 12 days
Weighted average years remaining, exercisable, end of period	1 year 10 months 24 days
Aggregate intrinsic value, outstanding	$ 236	$ 593
Aggregate intrinsic value, exercisable	$ 220