Slicers (applies to each fact value in each table cell)

Reporting Entity [Axis]

0001429560 (http://www.sec.gov/CIK)

Balance Sheets	Period [Axis]
	2016-12-31	2015-12-31
Balance Sheets
Assets
Current assets:
Cash and cash equivalents	24,266,000	46,774,000
Marketable securities	86,335,000	125,864,000
Prepaid expenses and other current assets	1,788,000	1,893,000
Total current assets	112,389,000	174,531,000
Property and equipment, net	1,059,000	696,000
Restricted cash	1,193,000	112,000
Intangible asset, net	13,000	15,000
Total assets	114,654,000	175,354,000
Liabilities and stockholders’ equity
Current liabilities:
Accounts payable	8,749,000	6,750,000
Accrued expenses and other current liabilities	8,208,000	3,030,000
Current portion of loans payable, net	5,039,000
Deferred revenue		3,750,000
Deferred rent	52,000	44,000
Total current liabilities	22,048,000	13,574,000
Loan payable, net	13,270,000	18,186,000
Capital leases, net of current portion	18,000	8,000
Deferred rent, net of current portion	187,000	239,000
Warrant liability	75,000	153,000
Other long term liabilities	475,000	63,000
Total liabilities	36,073,000	32,223,000
Commitments and contingencies (Note 8)	xsi:nil	xsi:nil
Redeemable convertible preferred stock:
Total redeemable convertible preferred stock
Stockholders' equity:
Common stock—$0.001 par value; 100,000,000 shares authorized, 55,768,414 and 50,802,603 shares issued and outstanding at December 31, 2016 and December 31, 2015, respectively	56,000	51,000
Preferred stock—$0.001 par value; 5,000,000 shares authorized, none issued or outstanding at December 31, 2016 and December 31, 2015	xsi:nil	xsi:nil
Additional paid-in capital	364,148,000	325,784,000
Accumulated deficit	(285,625,000)	(182,498,000)
Accumulated other comprehensive income (loss)	2,000	(206,000)
Total stockholders' equity	78,581,000	143,131,000
Total liabilities, redeemable convertible preferred stock and stockholders' equity	114,654,000	175,354,000