Accounting Policies [Line Items]

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Accounts receivable, balance due.

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Difference between current assets and current liabilities.

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Represents the number of customers.

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Standard product warranty period.

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Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

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Value of input used to measure outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur.

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Significant Accounting Policies (Narrative) (Details)		3 Months Ended								12 Months Ended
Significant Accounting Policies (Narrative) (Details)	Jan. 01, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2018 USD ($) customer	Dec. 31, 2017 USD ($) customer	Dec. 31, 2016 USD ($)	Dec. 31, 2014 USD ($)	May 24, 2017
Accounting Policies [Line Items]
Standard product warranty period										1 year
Unbilled accounts receivable		$ 224,000				$ 406,000				$ 224,000	$ 406,000
Intangible assets		355,000				355,000				355,000	355,000
Intangible assets, accumulated amortization		274,000				220,000				274,000	220,000
Total intangible amortization expense											54,000	$ 54,000
Advertising expense										$ 0	$ 0
Federal statutory rate										21.00%	34.00%
Expected term														5 years
Net loss		2,459,000	$ (63,000)	$ 5,065,000	$ 2,081,000	875,000	$ 2,587,000	$ 2,322,000	$ 1,999,000	$ 9,542,000	$ 7,783,000
Net cash used in operating activities										6,379,000	8,146,000
Cash and cash equivalents		3,359,000				3,526,000				3,359,000	$ 3,526,000	$ 5,241,000
Net working capital		8,800,000								8,800,000
Outstanding debt		$ 0								$ 0
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		0								0
Patents [Member]
Accounting Policies [Line Items]
Acquired patents													$ 290,000
Aquired patents weighted average remaining useful life										6 years 10 months 24 days
Minimum [Member]
Accounting Policies [Line Items]
Accounts receivable, balance due										30 days
Federal statutory rate										21.00%
Minimum [Member] \| Warrants [Member] \| Measurement Input, Risk Free Interest Rate [Member]
Accounting Policies [Line Items]
Measurement input		2.47								2.47
Minimum [Member] \| Warrants [Member] \| Measurement Input, Price Volatility [Member]
Accounting Policies [Line Items]
Measurement input		42.1								42.1
Maximum [Member]
Accounting Policies [Line Items]
Accounts receivable, balance due										90 days
Federal statutory rate											35.00%
Maximum [Member] \| Warrants [Member] \| Measurement Input, Risk Free Interest Rate [Member]
Accounting Policies [Line Items]
Measurement input		2.49								2.49
Maximum [Member] \| Warrants [Member] \| Measurement Input, Price Volatility [Member]
Accounting Policies [Line Items]
Measurement input		48.7								48.7
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						$ 3,808,000					$ 3,808,000
Remaining borrowing capacity		$ 4,100,000								$ 4,100,000
Subsequent Event [Member]
Accounting Policies [Line Items]
Estimate of the right-of-use asset and lease liability	$ 4,500,000
Revenues [Member] \| Customer Concentration Risk [Member]
Accounting Policies [Line Items]
Number of customers \| customer											1
Concentration risk percentage										100.00%	100.00%
Revenues [Member] \| Customer Concentration Risk [Member] \| One Customer [Member]
Accounting Policies [Line Items]
Concentration risk percentage											11.00%
Accounts Receivable [Member]
Accounting Policies [Line Items]
Number of customers \| customer										51
Accounts Receivable [Member] \| Customer Concentration Risk [Member]
Accounting Policies [Line Items]
Number of customers \| customer										4	2
Accounts Receivable [Member] \| Customer Concentration Risk [Member] \| Customer One [Member]
Accounting Policies [Line Items]
Concentration risk percentage										15.00%	12.00%
Accounts Receivable [Member] \| Customer Concentration Risk [Member] \| Customer Two [Member]
Accounting Policies [Line Items]
Concentration risk percentage										12.00%	9.00%
Accounts Receivable [Member] \| Customer Concentration Risk [Member] \| Customer Three [Member]
Accounting Policies [Line Items]
Concentration risk percentage										10.00%
Accounts Receivable [Member] \| Customer Concentration Risk [Member] \| Customer Four [Member]
Accounting Policies [Line Items]
Concentration risk percentage										10.00%