Acquisitions (Details) - USD ($)		3 Months Ended			12 Months Ended
	Aug. 15, 2014	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Business Combination, Contingent Consideration, Liability			$ 318,000			$ 318,000
Business Combination, Contingent Consideration, Average Closing Stock Price					6 days
Assets acquired and liabilities assumed
Goodwill			0		$ 0	0	$ 5,936,000	$ 8,390,000
Decrease in contingent consideration		$ 318,000	577,000		318,000	650,000	$ (43,000)
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.
Payments to Acquire Businesses, Gross	$ 1,800,000
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable	715,000
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	1,300,000
Business Combination, Contingent Consideration, Liability			$ 318,000	$ 925,000	$ 0	$ 318,000
Business Acquisition, Working Capital Adjustment to Consideration Transferrred	225,000
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