Note 2. Acquisitions (Details) - USD ($)		3 Months Ended	12 Months Ended
	Oct. 01, 2018	Sep. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Goodwill, Purchase Accounting Adjustments			$ 1,832,000
Goodwill			12,011,000	$ 18,104,000	$ 6,191,000
Finite-lived Intangible Assets Acquired			$ 0
GES
Business Acquisition, Date of Acquisition Agreement			Oct. 01, 2018
Business Acquisition, Transaction Costs			$ 2,200,000
Business Combination, Acquisition Related Costs			800,000	$ 500,000	$ 900,000
Business Combination, Consideration Transferred			42,400,000
Net Working Capital Adjustment for Acquisition			7,600,000
Final Net Working Capital Adjustment for Acquisition			3,800,000
Final net working capital adjustment charge on acquisition			3,800,000
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Property, Plant, and Equipment		$ 2,000,000
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Liabilities		200,000
Goodwill, Purchase Accounting Adjustments		$ 1,800,000	1,800,000
Business Acquisition, Goodwill, Expected Tax Deductible Amount			$ 8,900,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	$ 2,257,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	15,656,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory	6,454,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets	1,424,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	7,037,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	19,259,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets	498,000
Goodwill	13,745,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	66,330,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt	12,843,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable	4,113,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other	1,340,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other	5,653,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	23,949,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	42,381,000
Business Combination, Tax Liabilities Including Interest and Penalties Assumed, Liabilities	4,200,000
Business Combination, Tax Liabilities Including Interest and Penalties Assumed, Noncurrent Liabilities	3,900,000
Business Combination, Tax Liabilities Including Interest and Penalties Assumed, Current Liabilities	300,000
Business Combination, Indemnification Assets, Amount as of Acquisition Date	4,200,000
Finite-lived Intangible Assets Acquired	19,259,000
Computer Software, Intangible Asset | GES
Finite-lived Intangible Assets Acquired	379,000
Technology-Based Intangible Assets | GES
Finite-lived Intangible Assets Acquired	$ 5,060,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	5 years
Trade Names | GES
Finite-lived Intangible Assets Acquired	$ 6,369,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	10 years
Customer Relationships | GES
Finite-lived Intangible Assets Acquired	$ 7,451,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	15 years
Minimum | Computer Software, Intangible Asset | GES
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	3 years
Maximum | Computer Software, Intangible Asset | GES
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	7 years