OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Product warranty and deferred revenue (Details) (USD $)	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Deferred costs	$ 3,900,000	$ 5,500,000
Deferred software revenue	400,000	800,000
Warranty Reserves [Member]
Extended Product Warranty Disclosure [Abstract]
Liability, beginning balance	1,398,000	2,098,000
Settlements made during the period	(872,000)	(697,000)
Change in liability for warranties issued during the period	658,000	733,000
Change in liability for preexisting warranties	102,000	(736,000)
Liability, ending balance	1,286,000	1,398,000
Deferred revenue [Member]
Extended Product Warranty Disclosure [Abstract]
Deferred revenue, beginning balance	12,776,000	14,274,000
Settlements made during the period	(14,807,000)	(17,379,000)
Change in liability for warranties issued during the period	13,770,000	15,881,000
Change in liability for preexisting warranties	0	0
Deferred revenue, ending balance	$ 11,739,000	$ 12,776,000