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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parentheticals) - shares	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Common Class A [Member]
Purchases of shares of Common Stock (class A)	69,636	177,998	95,251
Common Class C [Member]
Number of shares converted	180	0	60
Common Stock [Member] | Common Class A [Member]
Balance	13,866,421	13,866,421	13,866,361
Balance	13,866,601	13,866,421	13,866,421
Purchases of shares of Common Stock (class A)	69,636	177,998	95,251
Issuance of stock under ESPP shares of Common Stock (class A)	3,433	39,084	37,383
Number of shares issued as result of stock conversion	180		60
Common Stock [Member] | Common Class C [Member]
Balance	2,069,127	2,069,127	2,069,187
Balance	2,068,947	2,069,127	2,069,127
Number of shares converted	180		60

X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Publisher FASB
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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586

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The number of new shares issued in the conversion of stock 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.

+ References

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-Name Accounting Standards Codification
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Number of shares issued during the period as a result of an employee stock purchase plan.

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

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