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Consolidated Balance Sheets (USD $)
Dec. 31, 2011
Dec. 31, 2010
Current assets:    
Cash and cash equivalents $ 13,311,261 $ 19,707,821
Marketable securities, current 3,280,591 190,804
Trade receivables 54,527 118,890
Other receivables 213,500 151,144
Prepaid assets 506,464 610,980
Other current assets 22,063 389,039
Total current assets 17,388,406 21,168,678
Property, plant and equipment, net 2,054,563 2,626,821
Other assets, non-current 1,856,057 1,931,871
Goodwill 1,895,000 1,877,315
Other intangible assets, net 2,011,473 2,996,888
Total assets 25,205,499 30,601,573
Current liabilities:    
Accounts payable 1,066,495 1,098,962
Accrued expenses and other current liabilities 2,970,251 2,828,168
Accrued wind-down expenses, current 1,360,766 1,310,571
Deferred revenue, current 43,910 45,885
Capital lease obligation, current 17,979 67,847
Deferred rent, current 2,603 0
Bonds payable, current 191,250 176,250
Total current liabilities 5,653,254 5,527,683
Capital lease obligation, non-current 0 17,979
Bonds payable, non-current 331,250 522,500
Fair value of warrant liability 6,042,315 6,671,929
Deposits and other long-term liabilities 281,807 276,439
Accrued wind-down expenses, non-current 774,020 1,989,800
Deferred rent, non-current 1,301,167 1,227
Deferred revenue, non-current 96,562 113,387
Total liabilities 14,480,375 15,120,944
Commitments and contingencies (Note 12)      
Stockholders' equity:    
Common stock, $0.01 par value; 75,000,000 shares authorized; issued and outstanding 22,427,955 at December 31, 2011 and 12,731,287 at December 31, 2010 1,472,776 1,273,128
Additional paid-in capital 341,811,657 325,359,265
Accumulated deficit (332,600,022) (311,271,486)
Accumulated other comprehensive income 40,713 119,722
Total stockholders' equity 10,725,124 15,480,629
Total liabilities and stockholders' equity $ 25,205,499 $ 30,601,573