Summary of Significant Accounting Policies (Details Textual) (USD $)	12 Months Ended
	Feb. 28, 2013	Feb. 29, 2012
Summary of significant accounting policies (Textual)
Deferred tax liability related to unrecognized gains and losses on short-term investments	$ 0	$ 0
Allowance for doubtful accounts (in dollars)	2,000	95,000
FDIC insured limit	250,000
Deposits in excess of FDIC insured limits	$ 433,000
Number of shares options vested	0	0
Treasury bills [Member]
Summary of significant accounting policies (Textual)
Maturity term	One year or less.
Certificates of deposit [Member]
Summary of significant accounting policies (Textual)
Maturity term	One to three years.