Summary of Significant Accounting Policies (Tables)

12 Months Ended

Jun. 30, 2012

Summary of Significant Accounting Policies [Abstract]

Schedule Of Doubtful Accounts

	Beginning		Costs and		Less		Ending
	Balance		Expenses		Charge-offs		Balance
Fiscal year ended June 30, 2012	$	314	$	41	$	92	$	263
Fiscal year ended June 30, 2011	$	138	$	184	$	8	$	314
Fiscal year ended June 30, 2010	$	603	$	45	$	510	$	138

Schedule Of Long-Term Investments

			Unrealized
Long-term Investments	Cost		Gains (Losses)		Book Value
June 30, 2012
Preferred Stock	$	6,300	$	(4,108)	$	2,192
June 30, 2011
Preferred Stock	$	6,300	$	(4,108)	$	2,192

Schedule Of Components Of Inventory

	At June 30,
	2012		2011
Component parts	$	2,373	$	2,388
Work in process		307		257
Finished goods		2,716		3,040
Total	$	5,396	$	5,685

Schedule Of Reserves For Obsolescence

	Beginning		Costs and		Less		Ending
	Balance		Expenses		Charge-offs		Balance
Fiscal year ended June 30, 2012	$	1,477	$	95	$	372	$	1,200
Fiscal year ended June 30, 2011	$	1,136	$	598	$	257	$	1,477
Fiscal year ended June 30, 2010	$	646	$	545	$	55	$	1,136

Investments At Fair Value On A Recurring Basis

Description	June 30, 2012		Level 1		Level 2		Level 3
Mutual funds	$	64	$	64	$	-	$	-
Fixed deposits and certificates of deposit		6,603		-		6,603		-
Variable rate demand notes		2,560		-		2,560		-
Repurchase agreements		2,000		-		2,000		-
Total	$	11,227	$	64	$	11,163	$
Description	June 30, 2011		Level 1		Level 2		Level 3
Mutual funds	$	32	$	32	$	-	$	-
Fixed deposits and certificates of deposit		10,650		-		10,650		-
Variable rate demand notes		2,015		-		2,015		-
Repurchase agreements		-		-		-		-
Total	$	12,697	$	32	$	12,665	$	-

Schedule of Product Warranty Liability

	Beginning		Costs and		Less		Ending
	Balance		Expenses		Charge-offs		Balance
Fiscal year ended June 30, 2012	$	63	$	146	$	(146)	$	63
Fiscal year ended June 30, 2011	$	63	$	156	$	(156)	$	63
Fiscal year ended June 30, 2010	$	72	$	157	$	(166)	$	63