Fair Value Measurements - Assets Carried at Fair Value Measured on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Assets:
Cash equivalents	$ 14,260	$ 6,330
Cash equivalents and marketable securities	17,204	9,704
Corporate Bonds [Member]
Assets:
Marketable securities	2,444	2,375
Commercial Paper [Member]
Assets:
Marketable securities	500	999
Fair Value, Inputs, Level 1 [Member]
Assets:
Cash equivalents	14,260	6,330
Cash equivalents and marketable securities	16,196	7,949
Fair Value, Inputs, Level 1 [Member] | Corporate Bonds [Member]
Assets:
Marketable securities	1,936	1,619
Fair Value, Inputs, Level 1 [Member] | Commercial Paper [Member]
Assets:
Marketable securities
Fair Value, Inputs, Level 2 [Member]
Assets:
Cash equivalents
Cash equivalents and marketable securities	1,008	1,755
Fair Value, Inputs, Level 2 [Member] | Corporate Bonds [Member]
Assets:
Marketable securities	508	756
Fair Value, Inputs, Level 2 [Member] | Commercial Paper [Member]
Assets:
Marketable securities	500	999
Fair Value, Inputs, Level 3 [Member]
Assets:
Cash equivalents
Cash equivalents and marketable securities
Fair Value, Inputs, Level 3 [Member] | Corporate Bonds [Member]
Assets:
Marketable securities
Fair Value, Inputs, Level 3 [Member] | Commercial Paper [Member]
Assets:
Marketable securities