Note 1 - Significant Accounting Policies (Details Textual) - USD ($)	3 Months Ended	12 Months Ended
Mar. 31, 2018	Dec. 31, 2017
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| US-based IT OEM Company [Member]
Concentration Risk, Percentage	66.00%	26.00%
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| US-Based Electrical Equipment Company [Member]
Concentration Risk, Percentage		22.00%
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| US-based Technology Company [Member]
Concentration Risk, Percentage		23.00%
Maintenance Contracts [Member]
Revenue, Remaining Performance Obligation, Amount	$ 2,444,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
All Other Services [Member]
Revenue, Remaining Performance Obligation, Amount	$ 479,000
Maximum [Member]
Allowance for Doubtful Accounts Receivable, Ending Balance	$ 8,000	$ 5,000
Maximum [Member] \| All Other Services [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	3 years
Minimum [Member] \| All Other Services [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year

For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible.

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- Definition

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.

+ References

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- Definition

Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
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Period in which remaining performance obligation is expected to be recognized as revenue, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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