Stockholders' Equity - Schedule of Common Stock Reserved for Future Issuance (Detail) In Thousands, unless otherwise specified	Jun. 30, 2014
Class of Stock [Line Items]
Total common stock reserved for issuance, shares	1,952
Stock options and restricted stock units outstanding [Member]
Class of Stock [Line Items]
Total common stock reserved for issuance, shares	480
Stock options and restricted stock available for grant [Member]
Class of Stock [Line Items]
Total common stock reserved for issuance, shares	1,158
Employee stock purchase plan shares available for purchase [Member]
Class of Stock [Line Items]
Total common stock reserved for issuance, shares	314