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Condensed Consolidated Balance Sheets (Unaudited) (USD $)
Sep. 30, 2014
Dec. 31, 2013
Current assets:    
Cash and cash equivalents $ 32,212,589 $ 30,585,424
Trade receivables 70,495 108,815
Other receivables 173,870 486,222
Prepaid assets 1,037,155 530,037
Deferred financing costs, current 28,409 46,420
Other assets, current 40,000 83,537
Total current assets 33,562,518 31,840,455
Property, plant and equipment, net 5,126,112 5,304,684
Deferred financing costs, non-current 4,162 23,307
Other assets, non-current 399,672 413,717
Goodwill 2,093,602 2,139,294
Other intangible assets, net 1,584,046 1,835,717
Total assets 42,770,112 41,557,174
Current liabilities:    
Accounts payable 1,216,980 1,151,903
Accrued expenses and other current liabilities 2,610,659 4,067,916
Deferred revenue, current 27,524 67,245
Capital lease obligation, current 21,827 21,316
Deferred rent, current 73,060 34,366
Loan payable net of discount, current 3,919,286 3,664,370
Bonds payable, current   125,000
Total current liabilities 7,869,336 9,132,116
Capital lease obligations, non-current 13,069 29,422
Loan payable net of discount, non-current 12,049,258 9,244,874
Fair value of warrant liability 4,011,736 5,541,809
Other long-term liabilities 1,273,190 801,388
Deferred rent, non-current 1,757,750 1,790,943
Deferred revenue, non-current 50,291 62,910
Total liabilities 27,024,630 26,603,462
Commitments and contingencies (Note 7)      
Stockholders' equity:    
Common stock, $0.01 par value; 225,000,000 shares authorized; issued and outstanding 68,660,276 at September 30, 2014 and 55,138,311 at December 31, 2013 686,603 551,383
Additional paid-in capital 424,902,142 401,680,562
Accumulated deficit (410,023,000) (387,530,334)
Accumulated other comprehensive income 179,737 252,101
Total stockholders' equity 15,745,482 14,953,712
Total liabilities and stockholders' equity $ 42,770,112 $ 41,557,174