Business Acquisitions - Dextro, Inc. Narrative (Details) - Dextro, Inc. - USD ($)	Feb. 08, 2017	Dec. 31, 2017
Business Acquisition [Line Items]
Total purchase price	$ 7,500,000
Payments to acquire businesses, net	7,500,000
Contingent liability	1,000,000
Additional contingent consideration arrangements	$ 1,400,000
Business combination, liabilities arising from contingencies, amount recognized		$ 0
Intangible assets, weighted average useful life	3 years 4 months 24 days
Acquisition transaction costs	$ 200,000