BALANCE SHEETS (USD $)	Dec. 31, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 7,109,215	$ 3,812,535
Other current assets	124,773	85,525
Total current assets	7,233,988	3,898,060
Property & equipment, net of accumulated depreciation of $1,193,601 and $1,109,558, respectively	1,029,236	815,958
Total assets	8,263,224	4,714,018
Current liabilities:
Accounts payable	476,315	358,837
Accounts payable-related parties	15,000	15,000
Accrued expenses	576,545	335,861
Current maturity of loan payable		35,607
Total current liabilities	1,067,860	745,305
Total liabilities	1,067,860	745,305
Commitments and contingencies
Stockholders' equity:
Preferred stock, no par value, 10,000,000 shares authorized, none issued and outstanding
Common stock, $0.01 par value, 100,000,000 shares authorized, 23,048,488 and 18,466,924 shares issued and outstanding	230,485	184,670
Additional paid in capital	107,645,666	98,496,382
Deficit accumulated during the development stage	(100,680,787)	(94,712,339)
Total stockholders' equity	7,195,364	3,968,713
Total liabilities and stockholders' equity	$ 8,263,224	$ 4,714,018