Acquisitions - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Goodwill	$ 12,484	$ 9,872
Nutronics, Inc.
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Cash	33
Accounts receivable	635
Contract assets	456
Inventory	255
Other current assets	201
Property, plant and equipment	1,019
Security deposits	46
Tangible assets acquired	2,645
Accounts payable	(278)
Other liabilities	(574)
Deferred revenue	(141)
Deferred taxes	(1,667)
Liabilities assumed	(2,660)
Total tangible assets acquired and liabilities assumed	(15)
Intangible assets	7,200
Goodwill	10,248
Net assets acquired	$ 17,433