Note 1. Summary of Significant Accounting Policies - Textuals (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Accounts Receivable, Customary Payment Terms	30 days
Accounts Receivable, Days Beyond Which Terms Are Considered Extended Payment Terms	30 days
LIFO Inventory as a Percentage of Consolidated Inventory	93.00%	91.00%
Other Intangible Assets, Amortization Expense	$ 786	$ 898	$ 992
Other Intangible Assets, Future Amortization Expense, Year One	855
Other Intangible Assets, Future Amortization Expense, Year Two	652
Other Intangible Assets, Future Amortization Expense, Year Three	522
Other Intangible Assets, Future Amortization Expense, Year Four	459
Other Intangible Assets, Future Amortization Expense, Year Five	296
Other Intangible Assets, Future Amortization Expense, after Year Five	237
Indefinite-Lived Intangible Assets	0	0
Research and Development Costs	6,000	7,000	7,000
Advertising Costs	4,000	4,000	$ 3,700
Notes Receivable, Unpaid Balance	1,885	1,786
Deferred Tax Assets	$ 12,790	$ 15,328
Capitalized Software | Minimum
Finite-Lived Intangible Asset, Useful Life	2 years
Capitalized Software | Maximum
Finite-Lived Intangible Asset, Useful Life	10 years
ASU 2015-17 Balance Sheet Classification of Deferred Tax Assets from Prepaid Expenses and Other Current Assets | Deferred Tax Assets
Deferred Tax Assets	$ 12,300
ASU 2015-17 Balance Sheet Classification of Deferred Tax Assets from Other Long Term Liabilities | Deferred Tax Assets
Deferred Tax Assets	$ 900