Note 12 - Income Taxes (Details Textual) - USD ($)		12 Months Ended		36 Months Ended
	Dec. 31, 2010	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2006
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		21.00%	34.00%
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount		$ 186,000	$ 707,000
Operating Loss Carryforwards, Valuation Allowance, Total		451,000
Operating Loss Carryforwards Subject to Expiration		188,000
Deferred Tax Assets, Operating Loss Carryforwards, Foreign		3,118,000	3,413,000
Unrecognized Tax Benefits, Cumulative Amount		32,000	36,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate		22,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total		10,000	11,000
VAT and Withholding Taxes				$ 800,000
Interest Penalty Percentage				20.00%
Reserve for Tax Deficiencies of Subsidiaries [Member]
Loss Contingency Accrual, Ending Balance		172,500
Selling, General and Administrative Expenses [Member] | Reserve for Tax Deficiencies of Subsidiaries [Member]
Loss Contingency Accrual, Period Increase (Decrease), Total	$ 185,000
Domestic Tax Authority [Member]
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount		$ 186,000	198,000
Foreign Tax Authority [Member]
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount			$ 509,000