Organization and Nature of Business; Basis of Presentation; Principles of Consolidation; Significant Accounting Policies - Allowance For Doubtful Accounts (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 213	$ 141	$ 445	$ 0
Provisions	78	149	114	290
Write-offs	(77)	0	(345)	0
Ending balance	$ 214	$ 290	$ 214	$ 290