Summary of Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2016 USD ($) Segment shares	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($) Segment
Segment Reporting [Abstract]
Number of reportable segments | Segment	1		1
Inventories [Abstract]
Gross inventory	$ 5,200,000	$ 4,400,000
Allowance for Obsolescent Inventory [Roll Forward]
Balance Beginning of Year	1,457,000	1,366,000	$ 417,000
Additions Charge to Costs and Expense	215,000	92,000	1,359,000
Deductions	0	(1,000)	(410,000)
Balance End of Year	1,672,000	1,457,000	1,366,000
Property, Plant and Equipment [Line Items]
Depreciation and amortization, including capital leases	$ 1,800,000	2,000,000	2,000,000
Goodwill and other intangible assets [Abstract]
Estimated useful life of intangible asset	5 years
Research and Development [Abstract]
Salary costs associated with research and development	$ 2,600,000	2,100,000	$ 2,200,000
Comprehensive Income [Abstract]
Foreign currency translation	82,000	70,000
Gain on pension liability adjustment	$ 107,000	$ 107,000
Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, and equipment, useful lives	20 years
Machinery and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, and equipment, useful lives	3 years
Machinery and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, and equipment, useful lives	5 years
Office Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, and equipment, useful lives	5 years
Telos ID [Member]
Business Acquisition [Line Items]
Percentage of ownership	50.00%
Teloworks [Member]
Business Acquisition [Line Items]
Percentage of ownership	100.00%
Restricted Stock Grants [Member]
Restricted Stock Grants [Abstract]
Restricted stock issued and outstanding (in shares) | shares	19,047,259
Restricted stock vested on date of grant	25.00%
Restricted stock vest on anniversary of the date of grant	25.00%