Note 9 - Income Taxes (Details Textual) - USD ($)	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Income Tax Expense (Benefit)	$ 214,000	$ 717,000
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	$ 640,000	$ 1,476,000
Effective Income Tax Rate Reconciliation, Percent	33.40%	48.60%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount, Return to Provision Adjustment	$ 72,000
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount	45,000	$ 298,000
Foreign Tax Authority [Member] | Secretariat of the Federal Revenue Bureau of Brazil [Member]
Unrecognized Tax Benefits	$ 1,000,000