Summary of Significant Accounting Policies (Tables)

12 Months Ended

Jun. 30, 2013

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, 2013	$	263	$	69	$	158	$	174
Fiscal year ended June 30, 2012	$	314	$	41	$	92	$	263
Fiscal year ended June 30, 2011	$	138	$	184	$	8	$	314

Schedule Of Long-Term Investments

			Unrealized
			Gains
Long-term Investments	Cost		(Losses)		Book Value
June 30, 2013
Preferred Stock	$	3,700	$	(2,975)	$	725
June 30, 2012
Preferred Stock	$	6,300	$	(4,108)	$	2,192

Schedule Of Components Of Inventory

	At June 30,
	2013		2012
Component parts	$	2,648	$	2,373
Work in process		376		307
Finished goods		3,759		2,716
Total	$	6,783	$	5,396

Schedule Of Reserves For Obsolescence

	Beginning		Costs and		Less		Ending
	Balance		Expenses		Charge-offs		Balance
Fiscal year ended June 30, 2013	$	1,200	$	96	$	172	$	1,124
Fiscal year ended June 30, 2012	$	1,477	$	95	$	372	$	1,200
Fiscal year ended June 30, 2011	$	1,136	$	598	$	257	$	1,477

Investments At Fair Value On A Recurring Basis

Description	June 30, 2013		Level 1		Level 2		Level 3
Mutual funds	$	25	$	25	$	-	$	-
Fixed deposits and certificates of deposit		9,581		-		9,581		-
Variable rate demand notes		1,715		-		1,715		-
Repurchase agreements		2,000		-		2,000		-
Total	$	13,321	$	25	$	13,296	$	-
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	$	-

Schedule of Product Warranty Liability

	Beginning		Costs and		Less		Ending
	Balance		Expenses		Charge-offs		Balance
Fiscal year ended June 30, 2013	$	63	$	123	$	123	$	63
Fiscal year ended June 30, 2012	$	63	$	146	$	146	$	63
Fiscal year ended June 30, 2011	$	63	$	156	$	156	$	63