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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Current assets:    
Cash and cash equivalents $ 64,087 $ 83,267
Short-term investments, available for sale 171,493 224,083
Other current assets 3,871 3,092
Total current assets 239,451 310,442
Property and equipment, net 7,144 6,271
Long-term investments, available for sale 37,686 43,490
Restricted cash 5,083 4,883
Total assets 289,364 365,086
Current liabilities:    
Accounts payable 852 5,085
Accrued liabilities 18,403 21,097
Current portion of cease-use liability 243 236
Current portion of deferred rent 513 470
Current portion of deferred gain on sale of real estate 3,552 3,526
Total current liabilities 23,563 30,414
Deferred gain on sale of real estate 6,467 7,372
Deferred revenue 10,231 10,231
Deferred rent 1,305 1,462
Cease-use liability 544 617
Other liabilities 113 113
Total liabilities 42,223 50,209
Commitments and contingencies
Stockholders' equity:    
Preferred stock, $0.001 par value; 5,000,000 shares authorized; no shares issued and outstanding 0 0
Common stock, $0.001 par value; 220,000,000 shares authorized; issued and outstanding shares were 87,519,910 as of March 31, 2017 and 86,883,300 as of December 31, 2016 88 87
Additional paid-in capital 1,381,938 1,371,432
Accumulated other comprehensive loss (235) (318)
Accumulated deficit (1,134,650) (1,056,324)
Total stockholders' equity 247,141 314,877
Total liabilities and stockholders' equity $ 289,364 $ 365,086