Note 1. Business Description and Summary of Significant Accounting Policies - Textuals (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Jun. 30, 2018
Operating Income (Loss)	$ 10,212	$ 10,119	$ 17,244	$ 19,642
Other General Income	0	0	$ (92)	0
Accounts Receivable, Extended Payment Terms			45 days
Accounts Receivable Sold Without Recourse			$ 127,300	81,200
Due From Bankers Acceptance Drafts	1,500		1,500		$ 3,800
SettlementofBankersAcceptanceDrafts			1,200	1,900
Factoring Fees	400	200	800	500
Non-operating income (expense), net	(520)	562	$ (691)	1,972
Minimum
Accounts Receivable, Customary Payment Terms			30 days
Maximum
Accounts Receivable, Customary Payment Terms			45 days
Accounting Standards Update 2017-07
Operating Income (Loss)	(106)	(74)	$ (206)	(141)
Non-operating income (expense), net	$ 106	$ 74	$ 206	$ 141