Subsequent Events (Narrative) (Details) - Restricted Stock Units (RSUs) $ in Millions					12 Months Ended
	Mar. 03, 2022 USD ($) officer shares	May 27, 2021 USD ($) shares	Mar. 08, 2021 USD ($) shares	Mar. 04, 2021 USD ($) people shares	Dec. 31, 2021 shares	Dec. 31, 2020 shares	Dec. 31, 2019 shares
Subsequent Event [Line Items]
Number of people granted awards | people				3
Percentage of performance based units on total units approved				50.00%
Grant date fair value | $		$ 0.3	$ 0.6	$ 1.7
Number of RSUs granted (in shares) | shares		9,936	17,793	52,486	80,000	79,000	73,000
Award vesting period			3 years	3 years
Executive Officer | Subsequent Event
Subsequent Event [Line Items]
Number of people granted awards | officer	3
Percentage of performance based units on total units approved	50.00%
Percentage of service based units on total units approved	50.00%
Grant date fair value | $	$ 1.5
Number of RSUs granted (in shares) | shares	47,831
Award vesting period	3 years