Share Based Payments Summary of Stock Options Outstanding and Activity (Details) $ / shares in Units, $ in Thousands	3 Months Ended
	May 31, 2016 USD ($) $ / shares shares
Options
Outstanding, beginning of period | shares	7,793,702
Granted | shares	582,500
Expired | shares	73,754
Outstanding, end of period | shares	8,302,448
Exercisable, end of period | shares	4,846,694
Price
Outstanding, beginning of period | $ / shares	$ 1.59
Granted | $ / shares	0.54
Expired or exchanged | $ / shares	11.17
Outstanding, end of period | $ / shares	1.43
Exercisable, end of period | $ / shares	$ 1.41
Outstanding	6 years 9 months 20 days
Exercisable, end of period	5 years 3 months 7 days
Outstanding, end of period | $	$ 98
Exercisable, end of period | $	$ 90