Note 10 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Restatement Adjustment [Member]
Accrued Income Taxes, Noncurrent	$ (6,600,000)	$ (7,800,000)
Deferred Tax Assets, Net of Valuation Allowance	(6,600,000)	(7,800,000)
State Administration of Taxation, China [Member]
Income Tax Examination, Liability (Refund) Adjustment from Settlement with Taxing Authority		200,000
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount		(400,000)
Her Majesty's Revenue and Customs (HMRC) [Member]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount		$ 300,000	$ 100,000
Effective Income Tax Rate Reconciliation, Percent		20.00%	23.00%
Secretariat of the Federal Revenue Bureau of Brazil [Member]
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount			$ (300,000)
Impact of Return to Provision Adjustments [Member]
Other Tax Expense (Benefit)		$ (300,000)
Domestic Tax Authority [Member]
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount			(200,000)
State and Local Jurisdiction [Member]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount			800,000
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	800,000
Foreign Tax Authority [Member] | Foreign Carryforward Losses [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	700,000
Foreign Tax Authority [Member] | Foreign Tax Credits [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	500,000
Foreign Tax Authority [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	1,200,000	(1,200,000)
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	2,400,000
Accrued Income Taxes, Noncurrent	4,607,000	3,013,000
Proceeds from Equity Method Investment, Dividends or Distributions	2,300,000
Tax Adjustments, Settlements, and Unusual Provisions	$ (332,000)	(265,000)	(764,000)
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount		278,000	880,000
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount			(800,000)
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount	$ 235,000	123,000	$ 353,000
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Amount				$ 200,000
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount				100,000
Deferred Tax Assets, Net	21,809,000	20,537,000
Increase (Decrease) in Pension Plan Obligations				$ 16,000,000
Income Taxes Receivable, Noncurrent	3,383,000	$ 3,775,000
Decrease in Unrecognized Tax Benefits is Reasonably Possible	400,000
Undistributed Earnings of Foreign Subsidiaries	$ 70,000,000