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CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY (Parentheticals) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Jul. 01, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Reclassification pursuant to adoption of ASU 2016-01, tax (in Dollars)	$ 1,049
Common Class A [Member]
Purchases of shares of Common Stock (class A)		11,000	36,748	12,000	45,947
Common Stock [Member] | Common Class A [Member]
Balance shares	13,866,691	13,866,691	13,866,601	13,866,691	13,866,601
Balance shares		13,866,691	13,866,691	13,866,691	13,866,691
Purchases of shares of Common Stock (class A)		11,000	36,748	12,000	45,947
Issuance of stock under ESPP		863	449	1,491	1,429
Conversion of shares			90		90
Common Stock [Member] | Common Class C [Member]
Balance shares	2,068,857	2,068,857	2,068,947	2,068,857	2,068,947
Balance shares		2,068,857	2,068,857	2,068,857	2,068,857
Conversion of shares			(90)		(90)

X

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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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Amount of the related income tax effect of a cumulative effect on retained earnings.

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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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