Note 9 - Income Taxes (Details Textual) - USD ($)	3 Months Ended			9 Months Ended		12 Months Ended
	Mar. 31, 2017	Sep. 30, 2016	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016	Jun. 30, 2016
Effective Income Tax Rate Reconciliation, Percent	36.80%		50.20%	40.80%	67.20%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount		$ 298,000
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount, Return to Provision Adjustment						$ 216,000
Deferred Tax Assets, Valuation Allowance	$ 0			$ 0
Foreign Tax Authority [Member] | Secretariat of the Federal Revenue Bureau of Brazil [Member]
Unrecognized Tax Benefits	$ 931,000			$ 931,000