Consolidated Statements of Operations and Comprehensive Loss (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
Net revenues	$ 57,089	$ 50,932	$ 111,150	$ 101,658
Cost of revenues	30,054	26,607	60,116	55,771
Gross margin	27,035	24,325	51,034	45,887
Operating expenses:
Selling, general and administrative	12,677	13,944	24,967	28,265
Research and development	7,895	10,142	15,846	19,454
Amortization of intangible assets	1,762	1,803	3,524	3,788
Restructuring and other charges	1,162	97	2,430	82
Total operating expenses	23,496	25,986	46,767	51,589
Income (loss) from operations	3,539	(1,661)	4,267	(5,702)
Interest income	4	3	7	4
Interest expense	(8)	(11)	(16)	(26)
Other income, net	398	440	392	872
Income (loss) from continuing operations before income taxes	3,933	(1,229)	4,650	(4,852)
Tax provision (benefit)	1,047	(442)	1,047	(1,761)
Income (loss) from continuing operations	2,886	(787)	3,603	(3,091)
Loss from discontinued operations, net of income taxes	(2,621)	(258)	(2,839)	(210)
Net income (loss)	265	(1,045)	764	(3,301)
Basic net loss per share: (in dollars per share)	$ 0.09	$ (0.02)	$ 0.11	$ (0.10)
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Basic Share	$ (0.08)	$ (0.01)
Earnings Per Share, Basic	$ 0.01	$ (0.03)
Diluted net loss per share: (in dollars per share)	$ 0.09	$ (0.02)	$ 0.11	$ (0.10)
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Diluted Share	$ (0.08)	$ (0.01)	$ (0.09)	$ (0.01)
Earnings Per Share, Diluted	$ 0.01	$ (0.03)	$ 0.02	$ (0.11)
Weighted-average shares outstanding:
Basic (in shares)	32,052	30,988	31,880	30,820
Diluted (in shares)	32,686	30,988	32,720	30,820
Comprehensive income (loss):
Net income (loss)	265	(1,045)	764	(3,301)
Foreign currency translation adjustments	(111)	(74)	(208)	(15)
Total comprehensive income (loss)	$ 154	$ (1,119)	$ 556	$ (3,316)