Revenues - Changes in Balances of Deferred Costs to Obtain and Fulfill Contracts (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($)
Deferred Costs to Obtain Contracts [Member]
Capitalized Contract Cost [Line Items]
Balance at beginning of period	$ 207
Costs deferred	155
Amortization	(50)
Balance at end of period	312
Deferred Costs to Fulfill Contracts [Member]
Capitalized Contract Cost [Line Items]
Balance at beginning of period	154
Costs deferred	14
Amortization	(33)
Balance at end of period	$ 135