CONDENSED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 9,904	$ 12,810
Restricted cash	268	268
Marketable securities	86,991	102,035
Interest and other receivables	514	475
Prepaid assets	886	524
Total current assets	98,563	116,112
Noncurrent marketable securities	15,560	13,954
Property and equipment, net	121	183
Total assets	114,244	130,249
Current liabilities:
Accounts payable	261	225
Accrued compensation and benefits	2,651	2,843
Accrued collaboration charges	1,946	3,367
Accrued liabilities	1,112	1,434
Total current liabilities	5,970	7,869
Commitments and contingencies
Stockholders' equity:
Common stock	159	159
Additional paid-in capital	1,086,578	1,080,198
Accumulated deficit	(978,411)	(957,924)
Accumulated other comprehensive loss	(52)	(53)
Total stockholders' equity	108,274	122,380
Total liabilities and stockholders' equity	$ 114,244	$ 130,249

Carrying value as of the balance sheet date of obligations incurred and payable to collaboration partner for which invoices have not yet been received under the respective collaboration agreement (due within one year or within the normal operating cycle if longer).

No definition available.