Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Summary of Significant Accounting Policies
Allowance for doubtful accounts, beginning	$ 657	$ 700
Bad debt expense	257	304
Write-offs	(239)	(347)
Allowance for doubtful accounts, ending	$ 675	$ 657