Income Taxes (Details 3) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Taxes
Liability for uncertain tax positions, beginning	$ 677,000	$ 643,000
Increases due to interest and state tax	34,000	34,000
Liability for uncertain tax positions, ending	$ 711,000	$ 677,000