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CONSOLIDATED BALANCE SHEETS (USD $) | Mar. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
--- | --- | --- | ---
CURRENT ASSETS: |  |  |
Cash and cash equivalents | $ 3,787,576 | $ 5,505,960 | $ 673,739
Restricted cash | 55,000 | 55,000 | 555,000
Prepaid expenses and other current assets | 183,300 | 254,967 | 51,042
Total current assets | 4,025,876 | 5,815,927 | 1,279,781
FIXED ASSETS, NET | 2,919,943 | 3,044,565 | 3,510,489
GOODWILL | 1,675,462 | 1,675,462 |
OTHER ASSETS | 27,222 | 27,222 | 11,872
TOTAL ASSETS | 8,648,503 | 10,563,176 | 4,802,142
CURRENT LIABILITIES: |  |  |
Accounts payable and accrued liabilities | 471,629 | 478,041 | 392,881
Accrued interest |  |  | 305,049
Derivative liability | 32,397 | 23,305 |
Notes payable, current portion |  |  | 204,802
Capital lease obligations, current portion | 2,275 | 2,235 | 2,085
Total current liabilities | 506,301 | 503,581 | 904,817
LONG-TERM LIABILITIES: |  |  |
Convertible debt |  |  | 2,720,985
Notes payable, net of current portion | 450,000 | 450,000 | 920,941
Deferred rent | 127,368 | 124,381 | 115,311
Capital lease obligations, net of current portion | 3,507 | 4,091 | 6,326
Total long-term liabilities | 580,875 | 578,472 | 3,763,563
TOTAL LIABILITIES | 1,087,176 | 1,082,053 | 4,668,380
COMMITMENTS AND CONTINGENCIES (Notes 13 and 14) |  |  |
STOCKHOLDERS' EQUITY: |  |  |
Preferred stock, $0.00001 par value; 7,000 shares authorized; none issued and outstanding as of March 31, 2012, December 31, 2011 and 2010 |  |  |
Common stock, $0.00001 par value; 150,000,000 shares authorized; 36,962,264, 36,907,824 and 12,820,102 shares issued and outstanding at March 31, 2012, December 31, 2011 and 2010, respectively | 369 | 369 | 128
Additional paid-in capital | 41,398,287 | 40,961,180 | 24,178,638
Deficit accumulated during the development stage | (33,837,329) | (31,480,426) | (24,045,004)
Total stockholders' equity | 7,561,327 | 9,481,123 | 133,762
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY | $ 8,648,503 | $ 10,563,176 | $ 4,802,142

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