BALANCE SHEETS - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 59,822,000	$ 64,396,000
Restricted cash		100,000
Short-term investments	126,889,000	0
Accounts receivable	744,000	1,875,000
Prepaid expenses and other current assets	2,299,000	482,000
Total current assets	189,754,000	66,853,000
Property and equipment, net	3,481,000	3,018,000
Intangible assets	1,750,000	1,750,000
Goodwill	949,000	949,000
Restricted cash	917,000
Other assets	364,000	492,000
Total assets	197,215,000	73,062,000
Current liabilities:
Accounts payable	4,697,000	1,919,000
Accrued liabilities	4,912,000	1,695,000
Deferred revenues, current portion	6,130,000	6,130,000
Long-term debt, current portion		1,419,000
Total current liabilities	15,739,000	11,163,000
Long-term debt, net of current portion		1,568,000
Deferred revenue, net of current portion	54,703,000	60,833,000
Convertible preferred stock warrant liability		186,000
Convertible preferred stock liability		395,000
Deferred tax liability	507,000	499,000
Other long-term liabilities	198,000	249,000
Total liabilities	$ 71,147,000	$ 74,893,000
Commitments and contingencies (Note 11)
Redeemable convertible preferred stock, $0.00001 par value – 0 and 21,759,654 shares authorized at December 31, 2015 and 2014, respectively; 0 and 18,458,289 shares issued and outstanding at December 31, 2015 and 2014		$ 76,710,000
Stockholders' equity (deficit)
Preferred stock, $0.00001 par value; 10,000,000 shares authorized at December 31, 2015; no shares issued and outstanding at December 31, 2015 and 2014, respectively
Common stock, $0.00001 par value; 75,000,000 and 28,572,789 shares authorized at December 31, 2015 and 2014, respectively; 36,033,209 and 996,520 shares issued and outstanding at December 31, 2015 and 2014, respectively	$ 1,000	$ 1,000
Stockholders notes receivable	(78,000)	(404,000)
Additional paid-in capital	243,687,000
Accumulated other comprehensive loss	(76,000)
Accumulated deficit	(117,466,000)	(78,138,000)
Total stockholders' equity (deficit)	126,068,000	(78,541,000)
Total liabilities, redeemable convertible preferred stock, convertible preferred stock and stockholders' equity (deficit)	$ 197,215,000	73,062,000
Redeemable Convertible Preferred Stock
Current liabilities:
Redeemable convertible preferred stock, $0.00001 par value – 0 and 21,759,654 shares authorized at December 31, 2015 and 2014, respectively; 0 and 18,458,289 shares issued and outstanding at December 31, 2015 and 2014		76,236,000
Convertible Preferred Stock
Current liabilities:
Redeemable convertible preferred stock, $0.00001 par value – 0 and 21,759,654 shares authorized at December 31, 2015 and 2014, respectively; 0 and 18,458,289 shares issued and outstanding at December 31, 2015 and 2014		$ 474,000