Note 9. Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($)	Jun. 30, 2018	Jun. 30, 2017
Deferred Tax Assets:
Deferred Tax Assets, Receivables	$ 158,000	$ 112,000
Deferred Tax Assets, Inventory	1,153,000	1,792,000
Deferred Tax Assets, Employee Benefits	194,000	190,000
Deferred Tax Assets, Deferred Compensation	6,496,000	8,226,000
Deferred Tax Assets, Other Current Liabilities	830,000	727,000
Deferred Tax Assets, Tax Credit Carryforwards	1,251,000	749,000
Deferred Tax Assets, Goodwill	655,000	1,421,000
Deferred Tax Assets, Net Operating Loss Carryforwards	2,376,000	1,597,000
Deferred Tax Assets, Unrealized Currency Losses	0	75,000
Deferred Tax Assets, Property, Plant and Equipment	0	1,774,000
Deferred Tax Assets, Miscellaneous	2,394,000	1,387,000
Deferred Tax Assets, Valuation Allowance	638,000	0
Deferred Tax Assets	14,869,000	18,050,000
Deferred Tax Liabilities:
Deferred Tax Liabilities, Property, Plant and Equipment	565,000	0
Deferred Tax Liabilities, Unrealized Currency Transaction Gains	12,000	0
Deferred Tax Liabilities, Miscellaneous	300,000	1,962,000
Deferred Tax Liabilities, Net	877,000	1,962,000
Net Deferred Income Taxes	$ 13,992,000	$ 16,088,000