Consolidated Statements of Stockholders' Equity (Unaudited) (USD $) In Thousands	Common Class A [Member] The 1984 ESOP [Member]	Common Class A [Member]	Common Class B [Member] The 2013 ESOP [Member]	Common Class B [Member]	Additional Paid-in Capital [Member] The 1984 ESOP [Member]	Additional Paid-in Capital [Member] The 2013 ESOP [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	The 1984 ESOP [Member]	The 2013 ESOP [Member]	Total
Balance at Jun. 30, 2012		$ 6,017		$ 753			$ 51,941	$ 94,661	$ (25,534)			$ 127,838
Total comprehensive income								(1,360)	(477)			(1,837)
Dividends								(2,040)				(2,040)
Purchase of stock		(5)					(57)					(62)
Issuance of stock dividends under ESOP	19				190					209
Issuance of stock under ESPP				20			141					161
Issuance of stock for length of service awards		2					30					32
Stock-based compensation							141					141
Conversion of common stock		31		(31)
Balance at Mar. 31, 2013		6,064		742			52,386	91,261	(26,011)			124,442
Balance at Jun. 30, 2013		6,077		750			52,613	91,778	(24,476)			126,742
Translation loss									(20,710)
Pension and postretirement plans, net of taxes									(2,887)
									(23,597)
Total comprehensive income								3,680	879			4,559
Dividends								(2,078)				(2,078)
Issuance of stock dividends under ESOP	17		76		188	697				205	773
Issuance of stock under long term incentive plan		3					36					39
Issuance of stock under ESPP				13			119					132
Issuance of stock for length of service awards		5					54					59
Stock-based compensation							105					105
Conversion of common stock		40		(40)
Balance at Mar. 31, 2014		$ 6,142		$ 799			$ 53,812	$ 93,380	$ (23,597)			$ 130,536