CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Additional Paid-in Capital	Accumulated Deficit	Noncontrolling Interests	Class A Common Stock Common Stock	Class B Common Stock Common Stock
Beginning Balance at Feb. 28, 2018	$ 78,263	$ 594,708	$ (547,252)	$ 30,680	$ 116	$ 11
Beginning Balance (in shares) at Feb. 28, 2018					11,649,440	1,142,366
Net (loss) income	24,239		23,485	754
Issuance of common stock to employees and officers, net	390	389				$ 1
Issuance of common stock to employees and officers, net (in shares)					(4,097)	100,000
Exercise of stock options	120	119			$ 1
Exercise of stock options (In shares)					45,834
Distributions to noncontrolling interests	(1,721)			(1,721)
Ending Balance at May. 31, 2018	101,291	595,216	(523,767)	29,713	$ 117	$ 12
Ending Balance (in shares) at May. 31, 2018					11,691,177	1,242,366
Beginning Balance at Feb. 28, 2018	78,263	594,708	(547,252)	30,680	$ 116	$ 11
Beginning Balance (in shares) at Feb. 28, 2018					11,649,440	1,142,366
Net (loss) income	26,220
Distributions to noncontrolling interests	(3,792)
Ending Balance at Nov. 30, 2018	101,886	595,900	(523,428)	29,284	$ 118	$ 12
Ending Balance (in shares) at Nov. 30, 2018					11,777,013	1,242,366
Beginning Balance at May. 31, 2018	101,291	595,216	(523,767)	29,713	$ 117	$ 12
Beginning Balance (in shares) at May. 31, 2018					11,691,177	1,242,366
Net (loss) income	432		(373)	805
Issuance of common stock to employees and officers, net	125	125
Issuance of common stock to employees and officers, net (in shares)					(26,778)
Exercise of stock options	12	12
Exercise of stock options (In shares)					5,000
Distributions to noncontrolling interests	(1,003)			(1,003)
Ending Balance at Aug. 31, 2018	100,857	595,353	(524,140)	29,515	$ 117	$ 12
Ending Balance (in shares) at Aug. 31, 2018					11,669,399	1,242,366
Net (loss) income	1,549		712	837
Issuance of common stock to employees and officers, net	336	335			$ 1
Issuance of common stock to employees and officers, net (in shares)					16,780
Exercise of stock options	212	212
Exercise of stock options (In shares)					90,834
Distributions to noncontrolling interests	(1,068)			(1,068)
Ending Balance at Nov. 30, 2018	101,886	595,900	(523,428)	29,284	$ 118	$ 12
Ending Balance (in shares) at Nov. 30, 2018					11,777,013	1,242,366
Beginning Balance at Feb. 28, 2019	100,367	595,984	(523,900)	28,153	$ 118	$ 12
Beginning Balance (in shares) at Feb. 28, 2019					11,809,291	1,242,366
Net (loss) income	2,516		1,670	846
Issuance of common stock to employees and officers, net	313	312			$ 1
Issuance of common stock to employees and officers, net (in shares)					56,458
Exercise of stock options	23	23
Exercise of stock options (In shares)					16,829
Distributions to noncontrolling interests	(1,121)			(1,121)
Ending Balance at May. 31, 2019	102,098	596,319	(522,230)	27,878	$ 119	$ 12
Ending Balance (in shares) at May. 31, 2019					11,882,578	1,242,366
Beginning Balance at Feb. 28, 2019	100,367	595,984	(523,900)	28,153	$ 118	$ 12
Beginning Balance (in shares) at Feb. 28, 2019					11,809,291	1,242,366
Net (loss) income	$ 62,965
Exercise of stock options (In shares)	199,643
Distributions to noncontrolling interests	$ (2,217)
Ending Balance at Nov. 30, 2019	114,597	597,439	(462,492)	(20,483)	$ 121	$ 12
Ending Balance (in shares) at Nov. 30, 2019					12,060,388	1,242,366
Beginning Balance at May. 31, 2019	102,098	596,319	(522,230)	27,878	$ 119	$ 12
Beginning Balance (in shares) at May. 31, 2019					11,882,578	1,242,366
Net (loss) income	7,845		7,013	832
Issuance of common stock to employees and officers, net	115	115
Issuance of common stock to employees and officers, net (in shares)					(1,724)
Exercise of stock options	78	78
Exercise of stock options (In shares)					32,316
Distributions to noncontrolling interests	(824)			(824)
Ending Balance at Aug. 31, 2019	109,312	596,512	(515,217)	27,886	$ 119	$ 12
Ending Balance (in shares) at Aug. 31, 2019					11,913,170	1,242,366
Net (loss) income	52,604		52,725	(121)
Issuance of common stock to employees and officers, net	339	339
Issuance of common stock to employees and officers, net (in shares)					(3,280)
Exercise of stock options	590	588			$ 2
Exercise of stock options (In shares)					150,498
Distributions to noncontrolling interests	(272)			(272)
Sale of controlling interest in subsidiary	(47,976)			(47,976)
Ending Balance at Nov. 30, 2019	$ 114,597	$ 597,439	$ (462,492)	$ (20,483)	$ 121	$ 12
Ending Balance (in shares) at Nov. 30, 2019					12,060,388	1,242,366