Intangible Assets and Goodwill - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2014	Dec. 31, 2012
Finite Lived Intangible Assets [Line Items]
Amortization expense, intangible assets		$ 358	$ 269
Residual value intangible assets	$ 0	0
Goodwill	7,446	7,446	5,585
Impairment of goodwill	0
Impairment charges		0
HGP [Member]
Finite Lived Intangible Assets [Line Items]
Goodwill	2,040	2,040	2,040		$ 2,000
NLEX [Member]
Finite Lived Intangible Assets [Line Items]
Goodwill	3,545	3,545	3,545	$ 3,500
ALT [Member]
Finite Lived Intangible Assets [Line Items]
Goodwill	$ 1,861	$ 1,861	$ 0