Schedule II Valuation and Qualifying Accounts (Details) (USD $)	12 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2011
Deductions	$ (534,000)		$ (187,000)		$ (268,000)
Allowance For Uncollectible Accounts [Member]
Balance at Beginning of Year	404,000		233,000		400,000
Additions Charged to Costs and Expenses	385,000		358,000		101,000
Additions Charged to Other Accounts	0		0		0
Deductions	(534,000)	[1]	(187,000)	[1]	(268,000)	[1]
Balance at End of Year	255,000		404,000		233,000
Reserve For Inventory valuation [Member]
Balance at Beginning of Year	519,000		768,000		492,000
Additions Charged to Costs and Expenses	107,000		190,000		341,000
Additions Charged to Other Accounts	0		0		0
Deductions	0		(439,000)	[2]	(65,000)	[2]
Balance at End of Year	$ 626,000		$ 519,000		$ 768,000

[1] Accounts written-off.

[2] Scrapped inventory