Significant Accounting Policies (Narrative) (Details)	1 Months Ended	3 Months Ended								12 Months Ended
	Oct. 31, 2019	Dec. 31, 2019 USD ($) item	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2019 USD ($) item	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Accounting Policies [Line Items]
Total intangible amortization expense										$ 32,000	$ 54,000
Standard product warranty period										1 year
Unbilled accounts receivable		$ 155,000				$ 224,000				$ 155,000	224,000
Advertising expense										0	0
Net loss		207,000	$ 315,000	$ 2,337,000	$ 1,439,000	2,459,000	$ (63,000)	$ 5,065,000	$ 2,081,000	4,298,000	9,542,000
Net cash used in operating activities										5,110,000	6,379,000
Cash and cash equivalents		3,515,000				3,359,000				3,515,000	3,359,000	$ 3,526,000
Net working capital		$ 8,800,000								$ 8,800,000
Work status reduction program, percentage decrease in senior management compensation	20.00%
Warrants [Member]
Accounting Policies [Line Items]
Expected term		5 years								5 years
Warrants [Member] | Measurement Input, Expected Dividend Rate [Member]
Accounting Policies [Line Items]
Measurement input | item		0								0
Minimum [Member]
Accounting Policies [Line Items]
Accounts receivable, balance due										30 days
Minimum [Member] | Warrants [Member] | Measurement Input, Risk Free Interest Rate [Member]
Accounting Policies [Line Items]
Measurement input | item		0.0156								0.0156
Minimum [Member] | Warrants [Member] | Measurement Input, Price Volatility [Member]
Accounting Policies [Line Items]
Measurement input | item		0.403								0.403
Maximum [Member]
Accounting Policies [Line Items]
Accounts receivable, balance due										90 days
Maximum [Member] | Warrants [Member] | Measurement Input, Price Volatility [Member]
Accounting Policies [Line Items]
Measurement input | item		0.464								0.464
Equipment [Member]
Accounting Policies [Line Items]
Estimated useful life										3 years
Equipment [Member] | Maximum [Member]
Accounting Policies [Line Items]
Estimated useful life										10 years
Revolving Credit Facility [Member]
Accounting Policies [Line Items]
Outstanding debt		$ 2,891,000								$ 2,891,000
Remaining borrowing capacity		$ 1,200,000								$ 1,200,000