Consolidated Statements Of Shareholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income
Beginning Balance at Jun. 30, 2010	$ 179,112	$ 229	$ 110,270	$ 67,671	$ 942
Beginning Balance (in shares) at Jun. 30, 2010		22,883,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee stock incentive plans (in shares)		594,000
Issuance of common stock under employee stock incentive plans	2,596	6	2,590
Issuance of common stock under employee stock purchase plan (in shares)		89,000
Issuance of common stock under employee stock purchase plan	1,094	1	1,093
Follow-on public stock offering (in shares)		5,578,000
Follow-on public stock offering	93,605	55	93,550
Stock-based compensation	5,580		5,580
Tax benefit from employee stock plan awards	694		694
Net (loss) income	18,442			18,442
Net unrealized gain (loss) on investments	2				2
Foreign currency translation adjustments	311				311
Ending Balance at Jun. 30, 2011	301,436	291	213,777	86,113	1,255
Ending Balance (in shares) at Jun. 30, 2011		29,144,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee stock incentive plans (in shares)		481,000
Issuance of common stock under employee stock incentive plans	466	5	461
Issuance of common stock under employee stock purchase plan (in shares)		104,000
Issuance of common stock under employee stock purchase plan	1,165	1	1,164
Stock-based compensation	6,616		6,616
Tax benefit from employee stock plan awards	751		751
Net (loss) income	22,619			22,619
Net unrealized gain (loss) on investments	(2)				(2)
Foreign currency translation adjustments	53				53
Ending Balance at Jun. 30, 2012	333,104	297	222,769	108,732	1,306
Ending Balance (in shares) at Jun. 30, 2012	29,729,065	29,729,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee stock incentive plans (in shares)		548,000
Issuance of common stock under employee stock incentive plans	436	6	430
Issuance of common stock under employee stock purchase plan (in shares)		104,000
Issuance of common stock under employee stock purchase plan	814	1	813
Stock-based compensation	7,940		7,940
Tax benefit from employee stock plan awards	(754)		(754)
Net (loss) income	(13,208)			(13,208)
Share-based business combination consideration	513		513
Net unrealized gain (loss) on investments	15				15
Foreign currency translation adjustments	(359)				(359)
Ending Balance at Jun. 30, 2013	$ 328,501	$ 304	$ 231,711	$ 95,524	$ 962
Ending Balance (in shares) at Jun. 30, 2013	30,381,254	30,381,000