Summary of Significant Accounting Policies (Details)		3 Months Ended		12 Months Ended
		Mar. 31, 2017 USD ($) customer	Mar. 31, 2016 USD ($) customer	Dec. 31, 2016 USD ($)
Revenues attributable to sales [Line Items]
Numbers of customers | customer		1	2
Revenues	[1]	$ 7,799,000	$ 8,647,000
Line of Credit Maintained		1,000,000
Adjustment to contingent consideration		$ 0	(318,000)
Contingent liability			$ 0
Accounting Standards Update 2014-09 | Early Adoption, Effect
Revenues attributable to sales [Line Items]
Revenues				$ 14,700,000
Significant Customers
Revenues attributable to sales [Line Items]
Percentage of net revenue		29.60%	42.00%
Significant Customers | Avnet
Revenues attributable to sales [Line Items]
Percentage of net revenue		29.60%	26.80%

[1] Represents the portfolio of available for sale securities that is included in restricted investments and short-term investments in the Company’s condensed consolidated balance sheets