Summary of Significant Accounting Policies (Details)	1 Months Ended	12 Months Ended
	May 31, 2017 shares	Dec. 31, 2017 USD ($) Segment shares	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Mar. 31, 2018 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | Segment		1
Inventories [Abstract]
Gross inventory		$ 15,000,000	$ 5,200,000
Allowance for Obsolescent Inventory [Roll Forward]
Balance Beginning of Year		1,672,000	1,457,000	$ 1,366,000
Additions Charge to Costs and Expense		73,000	215,000	92,000
Deductions		(261,000)	0	(1,000)
Balance End of Year		1,484,000	1,672,000	1,457,000
Property, Plant and Equipment [Line Items]
Capitalized software development costs		1,481,000	0	0
Amortization expense		$ 200,000
Software development estimated useful life		2 years
Depreciation and amortization, including capital leases		$ 2,000,000	1,800,000	2,000,000
Goodwill and other intangible assets [Abstract]
Goodwill amortization period for income tax purposes		15 years
Estimated useful life of intangible asset		5 years
Restricted Stock Grants [Abstract]
Restricted stock issued during the period (in shares) | shares		5,005,000
Restricted stock remained subject to vesting (in shares) | shares		3,723,750
Research and Development [Abstract]
Capitalized software development costs		$ 1,481,000	0	0
Software development estimated useful life		2 years
Amortization expense		$ 200,000
Salary costs associated with research and development		3,200,000	2,600,000	$ 2,100,000
Comprehensive Income [Abstract]
Foreign currency translation		75,000	82,000
Gain on pension liability adjustment		107,000
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred revenue		10,073,000	4,900,000
Accumulated deficit		$ (141,370,000)	$ (135,537,000)
Buildings [Member]
Property, Plant and Equipment [Line Items]
Software development estimated useful life		20 years
Research and Development [Abstract]
Software development estimated useful life		20 years
Machinery and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Software development estimated useful life		3 years
Research and Development [Abstract]
Software development estimated useful life		3 years
Machinery and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Software development estimated useful life		5 years
Research and Development [Abstract]
Software development estimated useful life		5 years
Office Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Software development estimated useful life		5 years
Research and Development [Abstract]
Software development estimated useful life		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 during the period (in shares) | shares	5,005,000
Restricted stock vested on date of grant		25.00%
Restricted stock vest on anniversary of the date of grant		25.00%
Accounting Standards Update 2014-09 [Member] | Forecast [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred revenue					$ (3,800,000)
Accumulated deficit					$ 3,800,000