Deferred Revenue and Remaining Performance Obligations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Deferred revenue	$ 451	$ 376
Revenues recognized included in contract liabilities balances	300	200	$ 200
Revenue expected to be recognized from remaining performance obligations	$ 10,300
Contact period	These agreements have between two and four year terms and revenue is recognized as product is shipped, typically on a straight-line basis. The remaining balance relates to executed service contracts that begin as warranty periods expire. These service contracts typically provide for four-year terms and revenue is recognized on a straight-line basis.
Products and services not yet delivered
Disaggregation of Revenue [Line Items]
Deferred revenue	$ 451	$ 376