Summary of Significant Accounting Policies - Calculation of Basic and Diluted Net Income (loss) Per Share from Continuing Operations (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 31, 2019	Aug. 31, 2018	Aug. 31, 2019	Aug. 31, 2018
Basic net income (loss) per common share:
Net income (loss) available to common shareholders	$ 7,013	$ (373)	$ 8,683	$ 23,112
Diluted net income (loss) per common share:
Net income (loss) available to common shareholders	$ 7,013	$ (373)	$ 8,683	$ 23,112
Basic shares:
Basic weighted average common shares outstanding (in shares)	12,830	12,522	12,802	12,521
Impact of equity awards (in shares)				974
Diluted shares:
Diluted weighted average common shares outstanding (in shares)	12,830	12,522	12,802	13,495
Basic net income (loss) per common share:
Basic net income (loss) per common share (in dollars per share)	$ 0.55	$ (0.03)	$ 0.68	$ 1.85
Diluted net income (loss) per common share:
Diluted net income (loss) per common share (in dollars per share)	$ 0.55	$ (0.03)	$ 0.68	$ 1.71