Condensed Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 117,814	$ 34,435
Accounts receivable	3,025	6,436
Prepaid expenses and other current assets	1,308	965
Total current assets	122,147	41,836
Property and equipment, net	1,138	530
Other assets	13	358
Restricted cash	180	180
Total assets	123,478	42,904
Current liabilities:
Accounts payable	2,308	2,284
Accrued compensation and benefits	802	927
Other accrued liabilities	1,003	95
Deferred rent		5
Deferred revenue, current portion	23,221	13,828
Total current liabilities	27,334	17,139
Deferred revenue, non-current	33,170	26,470
Convertible preferred stock warrant liability		6,456
Liabilities related to early exercise of options	107	163
Total liabilities	60,611	50,228
Commitments and contingencies
Convertible preferred stock, $0.0001 par value per share — no shares and 108,829,748 shares authorized as of June 30, 2014 and December 31, 2013, respectively; no shares and 11,517,222 shares issued and outstanding as of June 30, 2014 and December 31, 2013, respectively		56,155
Stockholders’ equity (deficit):
Preferred stock, $0.0001 par value; 5,000,000 shares and no shares authorized as of June 30, 2014 and December 31, 2013, respectively; no shares issued and outstanding as of June 30, 2014 and December 31, 2013, respectively
Common stock, $0.0001 par value — 300,000,000 and 130,360,121 shares authorized as of June 30, 2014 and December 31, 2013, respectively; 18,335,620 and 1,225,481 shares issued and outstanding as of June 30, 2014 and December 31, 2013, respectively	2
Additional paid-in capital	130,836	5,174
Accumulated deficit	(67,971)	(68,653)
Total stockholders’ equity (deficit)	62,867	(63,479)
Total liabilities, convertible preferred stock, and stockholders’ equity (deficit)	$ 123,478	$ 42,904