Organization and Nature of Business; Basis of Presentation; Principles of Consolidation; Significant Accounting Policies - Schedule of Product Warranty Reserve Activity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Movement in Standard Product Warranty Accrual [Roll Forward]
Beginning balance	$ 169	$ 305	$ 232	$ 403
Provisions (reversals), net	(31)	72	(41)	72
Warranty cost incurred	(17)	(40)	(70)	(138)
Ending balance	$ 121	$ 337	$ 121	$ 337