Acquisition - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Nov. 14, 2019	Dec. 31, 2018
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Goodwill	$ 9,872		$ 1,387
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		(477)
Deferred revenue		(141)
Liabilities assumed		(896)
Total tangible assets acquired and liabilities assumed		1,749
Intangible assets		7,200
Goodwill		8,484
Net assets acquired		$ 17,433