Note 10 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Jun. 30, 2019
Income Tax Expense (Benefit), Total	$ 957	$ 700	$ 2,380	$ 8,532
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest, Total	$ 3,045	$ 2,337	$ 6,978	$ 4,074
Effective Income Tax Rate Reconciliation, Percent, Total	31.00%	30.00%	34.00%	209.00%
Income Tax Expense (Benefit), Before Tax Cuts and Jobs Act				$ 1,300
Effective Income Tax Rate Reconciliation, Before Tax Cuts and Jobs Act, Percent				31.50%
Deferred Tax Assets, Valuation Allowance, Total	$ 0		$ 0
Foreign Tax Authority [Member] | Secretariat of the Federal Revenue Bureau of Brazil [Member]
Unrecognized Tax Benefits, Ending Balance	$ 100		$ 100
Forecast [Member]
Additional Tax Rate On Foreign Income					10.50%
Effective Income Tax Rate, Reconcilation Effected by GILTI, Estimate Increase					7.00%