Income Taxes: (Details) (USD $)	12 Months Ended
	Feb. 28, 2013	Feb. 29, 2012
Income Taxes:
U.S. federal income tax rate (as a percent)	34.00%
Actual income tax benefit
Expected benefit	$ (2,209,594)	$ (2,433,605)
Effect of expenses deducted directly by Dr. Burzynski	2,209,594	2,433,605
Other adjustments	(51,160)	165,068
Change in valuation allowance	51,160	(165,068)
Income tax expense	0
Deferred tax assets:
Net operating loss carryforwards	211,858	159,410
Excess book (tax) depreciation	(616)	(641)
Accrued expenses	5,925	7,238
Alternative minimum tax credit carryforwards	42,603	42,603
Total deferred tax assets	259,770	208,610
Less valuation allowance	(259,770)	(208,610)
Historical earnings	$ 0