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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parentheticals) - Common Stock [Member] - shares	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Common Class A [Member]
Balance	13,866,913	13,866,811	13,866,913	13,866,751
Balance	13,866,913	13,866,811	13,866,913	13,866,811
Purchases of shares of Common Stock (class A)	15,096	2,000	16,096	3,400
Issuance of stock under ESPP shares of Common Stock (class A)	308	419	575	733
Number of shares issued as result of stock conversion				60
Common Class C [Member]
Balance	2,068,635	2,068,737	2,068,635	2,068,797
Balance	2,068,635	2,068,737	2,068,635	2,068,737
Number of shares converted				(60)

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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The number of shares converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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Number of shares that have been repurchased during the period and are being held in treasury.

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