Acquisitions (Details) - USD ($)	3 Months Ended			12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2014	Dec. 31, 2017	Dec. 31, 2016	Aug. 15, 2014
Business Acquisition [Line Items]
Business Combination, Contingent Consideration, Average Closing Stock Price				6 days
Assets acquired and liabilities assumed
Decrease in contingent consideration	$ 318,000	$ 577,000		$ 0	$ 318,000
Developed Technology Rights [Member]
Assets acquired and liabilities assumed
Identifiable intangible assets			$ 800,000
Customer Relationships [Member]
Business Acquisition [Line Items]
Finite lived intangible asset, useful life range, Low value			6 years 6 months
Fair value inputs, discount range, low end of range			21.00%
Fair value inputs, discount range, high end of range			22.00%
Assets acquired and liabilities assumed
Identifiable intangible assets			$ 500,000
Trade Names [Member]
Assets acquired and liabilities assumed
Identifiable intangible assets			200,000
Lumewave, Inc. [Member]
Business Acquisition [Line Items]
Effective Date of Acquisition				Aug. 15, 2014
Percentage of Voting Interests Acquired						100.00%
Name of Acquired Entity				Lumewave, Inc.
Business Combination, Contingent Consideration, Liability		$ 318,000	$ 925,000	$ 0
Assets acquired and liabilities assumed
Cash and cash equivalents						$ 630,000
Accounts receivable						107,000
Inventory						31,000
Other current assets						259,000
Property and equipment						23,000
Identifiable intangible assets						1,500,000
Goodwill						1,257,000
Accounts payable						(352,000)
Accrued liabilities						(255,000)
Total assets acquired and liabilities assumed, net						$ 3,200,000