Stockholders' Equity - Issuance of Common Stock (Details) $ in Thousands			12 Months Ended
	Jul. 01, 2019 director shares	Jul. 02, 2018 director shares	Dec. 31, 2021 USD ($) shares	Dec. 31, 2020 USD ($) shares	Dec. 31, 2019 USD ($) shares	Dec. 31, 2018 shares	May 20, 2019 USD ($)	May 23, 2018 USD ($)
Share-based compensation
Stock compensation expense before tax benefit				$ 45	$ 77
Director | Restricted Stock
Share-based compensation
Fair value of equity grant award approved for each director							$ 50	$ 50
Number of restricted stock awards granted | shares	5,708	2,778	0	0	5,708	2,778
Number of directors granted restricted stock awards | director	2	1
Number of directors who elected to receive cash in lieu of the stock | director	2	3
Stock compensation expense before tax benefit			$ 0
Director | Restricted Stock | Maximum
Share-based compensation
Stock compensation expense before tax benefit				$ 100	$ 100