Summary of Significant Accounting Policies (Details) (USD $)	12 Months Ended
	Feb. 28, 2014	Feb. 28, 2013
Short-term investments:
Cost	$ 6,260,000	$ 5,160,000
Gross Unrealized Gains	1,000	13,000
Gross Unrealized Losses
Fair Value	6,261,000	5,173,000
Treasury bills [Member]
Short-term investments:
Cost	1,282,000	1,225,000
Gross Unrealized Gains	490
Gross Unrealized Losses
Fair Value	1,282,000	1,225,000
Certificates of deposit [Member]
Short-term investments:
Cost	4,978,000	3,935,000
Gross Unrealized Gains	510	13,000
Gross Unrealized Losses
Fair Value	$ 4,979,000	$ 3,948,000