Note 11 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
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
Effective Income Tax Rate Reconciliation, Percent			20.00%	23.00%
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	$ 700,000	1,200,000
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	2,600,000
State and Local Jurisdiction [Member]
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	1,000,000
Proceeds from Equity Method Investment, Dividends or Distributions		2,300,000
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount			$ 278,000
Deferred Tax Assets, Net	29,615,000	21,809,000
Increase (Decrease) in Pension Plan Obligations	19,000,000
Income Taxes Receivable, Noncurrent	2,655,000	$ 3,383,000
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount, Expiration of Statute of Limitations	100,000
Undistributed Earnings of Foreign Subsidiaries	$ 67,000,000