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

Reporting Entity [Axis]

0001034842 (http://www.sec.gov/CIK)

BALANCE SHEETS	Period [Axis]
	2016-12-31	2015-12-31
BALANCE SHEETS
Assets
Current assets:
Cash and cash equivalents	17,632,000	43,456,000
Short-term investments	57,134,000	82,820,000
Accounts receivable	0	203,000
Prepaid and other current assets	1,448,000	2,545,000
Total current assets	76,214,000	129,024,000
Property and equipment, net	1,156,000	1,613,000
Other assets	764,000	1,110,000
Total assets	78,134,000	131,747,000
Liabilities and stockholders' equity
Current liabilities:
Accounts payable	5,563,000	2,763,000
Accrued compensation	4,085,000	6,251,000
Accrued research and development	5,881,000	4,953,000
Other accrued liabilities	1,033,000	1,133,000
Deferred revenue		13,427,000
Deferred liability - sublease, current portion	3,222,000	3,005,000
Deferred rent, current portion	2,804,000	2,264,000
Total current liabilities	22,588,000	33,796,000
Long-term portion of deferred liability - sublease	238,000	3,460,000
Long-term portion of deferred rent	279,000	3,083,000
Other long-term liabilities	2,000	27,000
Commitments	xsi:nil	xsi:nil
Stockholders' equity:
Preferred stock, $0.001 par value; 10,000,000 shares authorized; none issued and outstanding as of December 31, 2016 and 2015	xsi:nil	xsi:nil
Common stock, $0.001 par value; 200,000,000 shares authorized; 99,269,418 and 90,554,589 shares issued and outstanding as of December 31, 2016 and 2015, respectively	100,000	91,000
Additional paid-in capital	1,115,807,000	1,082,980,000
Accumulated other comprehensive loss	(18,000)	(44,000)
Accumulated deficit	(1,060,862,000)	(991,646,000)
Total stockholders' equity	55,027,000	91,381,000
Total liabilities and stockholders' equity	78,134,000	131,747,000