Acquisitions - GVi Ventures, Inc. (Details) - USD ($)		12 Months Ended
	Apr. 12, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Revaluation of contingent consideration		$ (1,401,000)	$ (3,000)	$ (28,000)
Payment of contingent consideration		0	1,000,000	$ 1,926,000
GVi Ventures, Inc.
Business Acquisition [Line Items]
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, Low		0
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, High		2,500,000
Purchase price	$ 5,368,000
Cash paid in purchase price	4,069,000
Contingent consideration liability	1,299,000	0
Revaluation of contingent consideration		$ 1,065,000	282,000
Payment of contingent consideration			$ 1,000,000
Tax deductible goodwill	$ 443,000
Completed Technologies [Member] | GVi Ventures, Inc.
Business Acquisition [Line Items]
Intangible assets, useful life	5 years
Customer Relationships [Member] | GVi Ventures, Inc.
Business Acquisition [Line Items]
Intangible assets, useful life	8 years