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Summary of Significant Accounting Policies - Contract Balances (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Accounts Receivable
Accounts receivable - contracts with customers	$ 3,375	$ 3,354
Accounts receivable - ASC 842	10,633	8,164
Total Accounts Receivable	14,008	11,518
Less: Allowance for doubtful accounts	(1,126)	(1,129)
Total Accounts Receivable, net	12,882	10,389
Deferred income	$ 0	$ 1,312

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