Income Taxes - Income tax reconciliation (Details) - USD ($)	12 Months Ended
	Feb. 29, 2016	Feb. 28, 2015
Income tax (benefit) reconciliation:
Expected federal income tax	$ 252,321	$ 288,945
State tax, net of federal	39,059	31,371
Research and development tax credits	(135,904)	$ (155,110)
Overaccrual of prior year taxes	(67,579)
Deferred tax expense	$ 106,826
Permanent timing difference		$ 54,218
Income tax	$ 194,723	$ 219,424