Retirement Plans (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Retirement Plans
Minimum percentage of annual eligible compensation by the participants	1.00%
Maximum percentage of annual eligible compensation by the participants	90.00%
Percentage of contribution matched	6.00%
Percentage of contribution, matched 100% by employer	3.00%
Employer match of employee contributions of first 3% of contributions	100.00%
Percentage of contribution, matched 50% by employer	3.00%
Employer match of employee contributions of next 3% of contributions	50.00%
Vesting percentage	20.00%
Vesting period	5 years
Contribution expenses	$ 0.2	$ 0.2