Property, Plant, and Equipment - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 0.6	$ 0.6	$ 1.8	$ 1.8
Depreciation allocated to cost of revenue	0.5	0.5	1.5	1.5
Depreciation included in depreciation and amortization	$ 0.1	$ 0.1	$ 0.3	$ 0.3