Stock-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Number of Shares
Outstanding - beginning of period	15,000
Granted	0
Exercised	(2,000)
Expired	0
Forfeited	(1,000)
Outstanding - end of period	12,000	15,000
Exercisable - end of period	12,000
Weighted Average Exercise Price per Share
Outstanding - beginning of period	$ 4.76
Granted	0
Exercised	4.22
Expired	0
Forfeited	4.22
Outstanding - end of period	4.90	$ 4.76
Exercisable - end of period	$ 4.90
Weighted Average Remaining Contractual Term
Options outstanding	2 years 29 days	2 years 11 months 8 days
Options exercisable	2 years 29 days
Aggregate Intrinsic Value
Outstanding - beginning of period	$ 2,700
Granted	0
Exercised	9,390
Expired	0
Forfeited	320
Outstanding - end of period	19,860	$ 2,700
Options exercisable	$ 19,860