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Condensed Consolidated Balance Sheets (Unaudited) (USD $)
Jun. 30, 2014
Dec. 31, 2013
Current assets:    
Cash and cash equivalents $ 17,847,097 $ 30,585,424
Trade receivables 88,042 108,815
Other receivables 134,686 486,222
Prepaid assets 690,179 530,037
Deferred financing costs, current 34,492 46,420
Other assets, current 107,371 83,537
Total current assets 18,901,867 31,840,455
Property, plant and equipment, net 5,141,435 5,304,684
Deferred financing costs, non-current 8,763 23,307
Other assets, non-current 373,717 413,717
Goodwill 2,207,833 2,139,294
Other intangible assets, net 1,726,674 1,835,717
Total assets 28,360,289 41,557,174
Current liabilities:    
Accounts payable 1,705,801 1,151,903
Accrued expenses and other current liabilities 2,612,974 4,067,916
Deferred revenue, current 44,758 67,245
Capital lease obligation, current 22,098 21,316
Deferred rent, current 60,097 34,366
Loan payable net of discount, current 3,832,630 3,664,370
Bonds payable, current 17,917 125,000
Total current liabilities 8,296,275 9,132,116
Capital lease obligations, non-current 18,174 29,422
Loan payable net of discount, non-current 11,106,905 9,244,874
Fair value of warrant liability 8,525,666 5,541,809
Other long-term liabilities 1,129,859 801,388
Deferred rent, non-current 1,772,009 1,790,943
Deferred revenue, non-current 54,497 62,910
Total liabilities 30,903,385 26,603,462
Commitments and contingencies (Note 7)      
Stockholders' equity:    
Common stock, $0.01 par value; 225,000,000 shares authorized; issued and outstanding 56,967,158 at June 30, 2014 and 55,138,311 at December 31, 2013 569,672 551,383
Additional paid-in capital 403,790,377 401,680,562
Accumulated deficit (407,265,814) (387,530,334)
Accumulated other comprehensive income 362,669 252,101
Total stockholders' equity (2,543,096) 14,953,712
Total liabilities and stockholders' equity $ 28,360,289 $ 41,557,174