Acquisitions - Allocation (Details) - USD ($)	1 Months Ended	12 Months Ended
	Nov. 30, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Apr. 30, 2014
Business Acquisition [Line Items]
Goodwill		$ 5,475,000	$ 5,475,000	$ 4,799,000
Estimated useful life, purchased intangible assets	3 years
Amortization of intangible assets			782,000	$ 208,000
Cost of Revenues
Business Acquisition [Line Items]
Amortization of intangible assets			$ 300,000
Averail Corporation
Business Acquisition [Line Items]
Transaction costs on acquisition		$ 167,000
Goodwill					$ 676,000
Liabilities assumed					(294,000)
Net assets acquired					1,982,000
Estimated useful life, purchased intangible assets		4 years
Averail Corporation | Technology
Business Acquisition [Line Items]
Intangible assets					1,600,000
Technology - intangible asset					$ 1,600,000
Averail Corporation | Cost of Revenues
Business Acquisition [Line Items]
Amortization of intangible assets		$ 400,000