Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities:
Net income	$ 22,619	$ 18,442	$ 28,358
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	11,658	8,348	6,857
Stock-based compensation expense	6,616	5,580	4,016
(Benefit) provision for deferred income taxes	(3,056)	1,888	(9,698)
Impairment of long-lived assets		150	211
Excess tax benefit from stock-based compensation	(559)	(893)	(1,494)
Change in the fair value of the liability related to the LNX earn-out	(4,938)
Other non-cash items	(555)	(898)	(1,308)
Changes in operating assets and liabilities, net of effects of businesses acquired and disposed of:
Accounts receivable, unbilled receivable, and cost in excess of billings	6,755	257	(15,256)
Inventory	(7,267)	2,514	(859)
Prepaid income taxes	3,514	1,567	(2,162)
Prepaid expenses and other current assets	(816)	(2,120)	505
Other non-current assets	646	(677)	(113)
Accounts payable and accrued expenses	(1,092)	931	5,708
Deferred revenues and customer advances	(1,850)	(3,696)	234
Income taxes payable	820	21	(262)
Other non-current liabilities	(626)	60	971
Net cash provided by operating activities	31,869	31,474	15,708
Cash flows from investing activities:
Acquisition of businesses, net of cash acquired	(71,044)	(29,508)
Sales and maturities of marketable securities		18,025	32,025
Purchases of property and equipment	(9,427)	(8,825)	(7,334)
Payments for acquired intangible assets	(50)	(2,375)	(250)
Payments for sale of discontinued operations, net			(826)
Increase in restricted cash	(281)
Net cash (used in) provided by investing activities	(80,802)	(22,683)	23,615
Cash flows from financing activities:
Proceeds from follow-on public stock offering, net		93,605
Proceeds from employee stock plans	1,631	3,690	1,849
Excess tax benefit from stock-based compensation	559	893	1,494
Payments under line of credit			(33,364)
Payments of deferred financing costs		(31)	(170)
Payments of deferred offering costs	(30)	(59)
Repurchases of common stock			(433)
(Payments) proceeds of capital lease obligations	(185)	(298)	30
Net cash provided by (used in) financing activities	1,975	97,800	(30,594)
Effect of exchange rate changes on cash and cash equivalents	47	43	562
Net (decrease) increase in cash and cash equivalents	(46,911)	106,634	9,291
Cash and cash equivalents at beginning of year	162,875	56,241	46,950
Cash and cash equivalents at end of year	115,964	162,875	56,241
Cash paid during the period for:
Interest	40	45	150
Income taxes	8,686	4,397	2,587
Supplemental disclosures-non-cash activities:
Issuance of restricted stock awards to employees	8,367	9,204	6,219
Acquisition of intangible assets		495
Capital lease	$ 41	$ 251	$ 168