Summary of Significant Accounting Policies (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Revenues attributable to sales [Line Items]
Deferred revenue	$ 4,096,000		$ 4,096,000		$ 3,671,000
Cost of revenues	$ 2,617,000		2,617,000		2,422,000
Line of Credit Maintained			1,000,000
Adjustment to contingent consideration		$ (318,000)	$ 0	$ (318,000)
Contingent liability		$ 0		$ 0
Accounting Standards Update 2014-09
Revenues attributable to sales [Line Items]
Revenue sold through distribution channel					14,700,000
Deferred revenue					2,600,000
Cost of revenues					$ 668,000
Significant Customers
Revenues attributable to sales [Line Items]
Percentage of net revenue	29.00%	27.50%	29.10%	33.40%
Significant Customers | Avnet
Revenues attributable to sales [Line Items]
Percentage of net revenue	29.00%	27.50%	29.10%	28.10%