Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
OPERATING ACTIVITIES:
Net income	$ 6,560	$ 7,178
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,863	3,484
Share-based compensation:
Stock options	1,549	1,855
Nonvested stock awards	249	290
Cash-settled stock appreciation rights	156	99
Tax benefit from exercise/issuance of:
Stock options	59	687
Nonvested stock awards	25	39
Excess tax benefits from share-based payment arrangements	(65)	(300)
Deferred income taxes	(414)	1,303
Loss/(Gain) on disposal/retirement of property, plant and equipment	2	(25)
Changes in assets and liabilities which provided/(used) cash:
Accounts receivable	(1,952)	1,421
Prepaid expenses and other current assets	862	(1,910)
Inventory	1,642	(1,060)
Accounts payable and accrued expenses	1,803	(3,348)
Deferred revenue	(364)	100
Other current and non-current liabilities	(57)	(448)
Net cash provided by operating activities	13,918	9,365
INVESTING ACTIVITIES:
Additions to property, plant and equipment	(1,187)	(914)
Purchases of intangible assets	(660)	(1,619)
Proceeds from maturity of investments	1,930	25,990
Purchases of investments	(6,001)
Purchase of cost method investment		(2,453)
Note receivable from a cost method investee	(1,055)
Net cash (used in)/provided by investing activities	(6,973)	21,004
FINANCING ACTIVITIES:
Repayments of long term debt	(700)	(700)
Stock repurchase		(30,035)
Excess tax benefits from share-based payment arrangements	65	300
Proceeds from exercise of stock options	716	3,789
Net cash provided by/(used in) financing activities	81	(26,646)
INCREASE IN CASH	7,026	3,723
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	10,219	23,102
CASH AND CASH EQUIVALENTS, END OF PERIOD	17,245	26,825
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid for interest	965	1,029
Cash paid for income taxes	1,788	4,443
Accrual for purchases of property, plant and equipment	229
Retirement of fully depreciated property, plant and equipment	248	256
SUPPLEMENTAL DISCLOSURE OF NONCASH FINANCING INFORMATION:
Net share settlement of stock options	$ (336)