Stockholders' Equity - Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Nov. 30, 2020
Stockholders' equity
Common stock, outstanding shares (in shares)	16,788,000		16,779,000
Stock acquired (in shares)	4,671	6,881
Stock acquired	$ 200,000	$ 400,000
Stock Purchase Plan
Stockholders' equity
Authorized amount of repurchase under the stock purchase plan (up to)				$ 25,000,000