Note 2 - Summary of Significant Accounting Policies (Details Textual)	12 Months Ended
Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Equity Method Investment, Ownership Percentage	51.00%
Allowance for Doubtful Accounts Receivable, Ending Balance	$ 533,000	$ 342,000
Provision for Doubtful Accounts	196,000	113,000
Depreciation, Amortization and Accretion, Net, Total	1,500,000	1,500,000
Capitalized Computer Software, Gross	1,300,000	1,000,000
Capitalized Computer Software, Amortization	$ 1,200,000	$ 1,200,000
Number of Reporting Units	2	2
Allocated Share-based Compensation Expense, Total	$ 221,000	$ 225,000
Computer Software, Intangible Asset [Member]
Finite-Lived Intangible Asset, Useful Life	3 years
Minimum [Member]
Property, Plant and Equipment, Useful Life	3 years
Maximum [Member]
Property, Plant and Equipment, Useful Life	7 years

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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