Acquisitions - EnShape GmbH Narrative (Details) - EnShape GmbH [Member] - USD ($)			12 Months Ended
	Nov. 30, 2016	Oct. 27, 2016	Dec. 31, 2018
Business Acquisition [Line Items]
Purchase price		$ 7,901,000
Cash paid in purchase price		5,395,000
Deferred cash payment on business acquisition			$ 1,144,000
Contingent consideration, current			$ 1,362,000
Intangible assets, useful life	7 years
Tax deductible goodwill		$ 328,000