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Condensed Balance Sheets (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2012
Dec. 31, 2011
Current assets    
Cash and cash equivalents $ 73,779 $ 73,144 [1]
Marketable securities 22,117 24,987 [1]
Other current assets 475 358 [1]
Total current assets 96,371 98,489 [1]
Property and equipment, net 87 122 [1]
Other assets 352 352 [1]
Total assets 96,810 98,963 [1]
Current liabilities    
Accounts payable 502 464 [1]
Accrued development expense 419 914 [1]
Deferred program fee revenue - current portion 10,897 10,897 [1]
Accrued compensation and benefits 1,086 915 [1]
Other accrued liabilities 34 82 [1]
Total current liabilities 12,938 13,272 [1]
Non-current liabilities    
Deferred program fee revenue - non-current portion 38,139 40,863 [1]
Deferred tax liabilities 435 435 [1]
Total liabilities 51,512 54,570 [1]
Commitments and contingencies       [1]
Stockholders' equity    
Preferred stock       [1]
Common stock 45 45 [1]
Additional paid-in-capital 177,332 176,425 [1]
Accumulated other comprehensive income 96 128 [1]
Accumulated deficit (132,175) (132,205) [1]
Total stockholders' equity 45,298 44,393 [1]
Total liabilities and stockholders' equity $ 96,810 $ 98,963 [1]
[1] Derived from the Company's audited financial statements as of December 31, 2011, included in the Company's Annual Report on Form 10-K filed with the Securities and Exchange Commission.