Note 13 - Income Taxes (Details Textual) - USD ($)	1 Months Ended	3 Months Ended	12 Months Ended			36 Months Ended
	Nov. 30, 2019	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2011	Dec. 31, 2006
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount			$ 91,000	$ 186,000
Effective Income Tax Rate Reconciliation, Percent, Total				(5.40%)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%	21.00%
Deferred Tax Assets, Operating Loss Carryforwards, Domestic			$ 649,000	$ 451,000
Deferred Tax Assets, Operating Loss Carryforwards, Foreign			3,311,000	3,118,000
Unrecognized Tax Benefits, Cumulative Amount			30,000	32,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate			19,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total			10,000	10,000
Effective Income Tax Rate Reconciliation, Tax Settlement, Foreign, Amount			154,000
VAT and Withholding Taxes						$ 800,000
Interest Penalty Percentage						20.00%
Payments for Good Faith Deposits to Local Tax Authority Under Tax Agency's Adminstrative Judicial Resolution Process					$ 173,000
Domestic Tax Authority [Member]
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount			91,000	186,000
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration			$ 464,000
Open Tax Year			2016 2017 2018 2019
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Income Tax Examination, Year under Examination			2017
State and Local Jurisdiction [Member]
Open Tax Year			2016 2017 2018 2019
Foreign Tax Authority [Member]
Foreign Tax Settlement			$ 25,000
Foreign Tax Authority [Member] | Tax Year 2017 [Member]
Income Tax Examination, Amount of Alleged Deficiencies			217,000
Income Taxes Paid		$ 96,000
Foreign Tax Authority [Member] | Tax Periods of Years 2005 Through 2006 [Member]
Income Taxes Paid	$ 164,000
Loss Contingency Accrual, Ending Balance				$ 172,500
Foreign Tax Authority [Member] | Tax Year 2004 [Member]
Income Tax Examination, Liability (Refund) Adjustment from Settlement with Taxing Authority			$ 84,000