XML 32 R6.htm IDEA: XBRL DOCUMENT v2.4.0.6
Consolidated Statements of Cash Flows (USD $)
 12 Months Ended 138 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2012
Cash flows from operating activities:        
Net loss $ (2,135,140) $ (2,346,826) $ (2,747,328) $ (24,767,142)
Adjustments to reconcile net loss to net cash used in operating activities:        
Depreciation and amortization 93,643 109,017 119,773 659,280
Accretion of preferred stock redemption value       346,673
Stock-based compensation expense, including common stock issued for services 310,076 772,997 750,532 6,669,815
Changes in assets and liabilities:        
Grant funds receivable (82,733) 290,760 (153,954) (266,248)
Prepaid expenses and other current assets (12,593) 19,122 (4,215) (42,301)
Deferred offering costs   430,402 (430,402)  
Deposits   980 (11,010) (11,010)
Accounts payable and accrued expenses (614,500) 419,927 39,033 415,825
Total adjustments (306,107) 2,043,205 309,757 7,772,034
Net cash used in operating activities (2,441,247) (303,621) (2,437,571) (16,995,108)
Cash flows from investing activities:        
Purchase of property and equipment   (11,896) (4,706) (538,490)
Proceeds from sale of property and equipment     5,580 5,580
Net cash provided (used) by investing activities   (11,896) 874 (532,910)
Cash flows from financing activities:        
Proceeds from sale of common stock 310,160 404,410   15,836,468
Proceeds from sale of preferred stock 1,999,032     2,727,475
Net cash provided by financing activities 2,309,192 [1] 404,410 [1]    [1] 18,563,943 [1]
Net increase (decrease) in cash and cash equivalents (132,055) 88,893 (2,436,697) 1,035,925
Cash and cash equivalents at beginning of period 1,167,980 1,079,087 3,515,784  
Cash and cash equivalents at end of period 1,035,925 1,167,980 1,079,087 1,035,925
Supplemental disclosure of cash flow information Interest paid       $ 5,669
[1] Supplemental disclosure of non-cash investing and financing activities: In connection with the Merger discussed in Note 5, all of the then outstanding shares of the Company's mandatory redeemable convertible preferred stock were converted into shares of common stock as of September 28, 2006. As discussed in Note 6, during 2012, an aggregate of 1,412 shares of the Company's outstanding Series A Convertible Preferred Stock were converted into 1,882,667 shares of common stock.