Note 9 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended	9 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Mar. 31, 2018	Mar. 31, 2017	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent								34.00%
Deferred Income Tax Expense (Benefit), Total			$ 7,300	$ 7,649	$ 702
Income Tax Expense (Benefit), Total	$ 700	$ (458)		8,532	713
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest, Total	$ 2,337	$ (1,244)		$ 4,074	$ 1,749
Effective Income Tax Rate Reconciliation, Percent, Total	30.00%	36.80%		209.00%	40.80%
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%
Income Loss From Continuing Operations Before Income Taxes, Prior Year Discrete Charges	$ 7,200
Increase in Interest Expense on Uncertain Tax Positions		$ 100
Deferred Tax Assets, Valuation Allowance, Total	0			$ 0
Foreign Tax Authority [Member] | Her Majesty's Revenue and Customs (HMRC) [Member]
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability					$ 300
Foreign Tax Authority [Member] | Secretariat of the Federal Revenue Bureau of Brazil [Member]
Unrecognized Tax Benefits, Ending Balance	$ 200			$ 200
Scenario, Forecast [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent						21.00%	28.00%