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Stock-Based Compensation (Details) - USD ($) $ in Thousands				12 Months Ended
	Jun. 09, 2020	May 01, 2018	May 05, 2016	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2016
Stock-Based Compensation Plans
Number of awards previously granted under prior plans remains outstanding				0
Stock-based compensation expense				$ 703	$ 1,205
Restricted stock awards
Stock-Based Compensation Plans
Stock-based compensation expense					15
Restricted stock units
Stock-Based Compensation Plans
Stock-based compensation expense				$ 703	893
Common stock awards
Stock-Based Compensation Plans
Stock-based compensation expense					$ 297
The 2016 Plan
Stock-Based Compensation Plans
Number of shares authorized		1,050,000				1,000,000
Percentage of stock dividend approved by the board		5.00%
Restated 2016 Plan
Stock-Based Compensation Plans
Number of shares authorized	2,050,000
Number of additional shares authorized	1,000,000
Shares available for future issuance				1,376,299
Option expiration term			10 years

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