Shareholders' Equity - Additional Information (Detail)		9 Months Ended	97 Months Ended
	Nov. 30, 2016 USD ($)	Nov. 30, 2016 USD ($) $ / shares shares	Nov. 30, 2016 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Repurchase of common stock through a stock repurchase program | $	$ 20,000,000	$ 20,000,000	$ 20,000,000
Repurchase of common stock | shares		491,057	1,209,568
Repurchase of common stock, average cost per share | $ / shares		$ 15.79	$ 14.57
Total amount available to repurchase of shares | $	$ 2,400,000
Unrelated to Stock Repurchase Program [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Repurchase of common stock | shares		112
Repurchase of common stock, average cost per share | $ / shares		$ 16.15