Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands	3 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
OPERATING ACTIVITIES:
Net income	$ 2,263	$ 3,845
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,903	1,757
Share-based compensation:
Stock options	906	856
Nonvested stock awards	121	139
Cash-settled stock appreciation rights	25	169
Tax benefit from exercise/issuance of:
Stock options	61	691
Excess tax benefits from share-based payment arrangements	(37)	(295)
Deferred income taxes	(75)	321
Loss/(Gain) on disposal/retirement of property, plant and equipment	2	(15)
Changes in assets and liabilities which provided/(used) cash:
Accounts receivable	(38)	2,299
Prepaid expenses and other current assets	1,125	(86)
Inventory	726	(1,517)
Accounts payable and accrued expenses	961	(813)
Deferred revenue	(145)	(163)
Other non-current liabilities	(34)
Net cash provided by operating activities	7,764	7,188
INVESTING ACTIVITIES:
Additions to property, plant and equipment	(460)	(639)
Proceeds from maturity of investments	1,250	14,330
Note receivable from a cost method investee	(1,055)
Net cash (used in)/provided by investing activities	(265)	13,691
FINANCING ACTIVITIES:
Repayments of long term debt	(350)	(350)
Stock repurchase		(25,879)
Excess tax benefits from share-based payment arrangements	37	295
Proceeds from exercise of stock options	611	3,407
Net cash provided by/(used in) financing activities	298	(22,527)
INCREASE/(DECREASE) IN CASH	7,797	(1,648)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	10,219	23,102
CASH AND CASH EQUIVALENTS, END OF PERIOD	18,016	21,454
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid for interest	486	526
Cash paid for income taxes	86	1,743
Retirement of fully depreciated property, plant and equipment	$ 117	$ 186