Variable Interest Entity - Summary of Revenues and Expenses Included in Consolidated Statements of Operations and Comprehensive (Loss) Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 31, 2022	Aug. 31, 2021	Aug. 31, 2022	Aug. 31, 2021
Variable Interest Entity [Line Items]
Net sales	$ 125,705	$ 143,109	$ 254,437	$ 280,169
Cost of sales	96,448	105,923	191,941	206,288
Gross profit	29,257	37,186	62,496	73,881
Selling	11,865	11,838	24,150	23,305
General and administrative	19,082	17,884	38,212	36,560
Engineering and technical support	8,284	7,886	16,673	14,118
Total operating expenses	39,231	39,924	79,171	76,975
Operating loss	(9,974)	(2,738)	(16,675)	(3,094)
Interest and bank charges	(911)	(582)	(1,641)	(1,110)
Other, net	(1,519)	376	(3,629)	818
Total other (expense) income, net	(1,653)	1,829	(3,891)	4,466
(Loss) income before income taxes	(11,627)	(909)	(20,566)	1,372
Income tax expense	(708)	(217)	(1,800)	267
Net (loss) income	(10,919)	(692)	(18,766)	1,105
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Net sales	332	253	435	458
Cost of sales	198	177	276	340
Gross profit	134	76	159	118
Selling	139	163	304	326
General and administrative	411	432	784	776
Engineering and technical support	631	1,641	1,500	3,128
Total operating expenses	1,181	2,236	2,588	4,230
Operating loss	(1,047)	(2,160)	(2,429)	(4,112)
Interest and bank charges	(435)	(415)	(868)	(816)
Other, net	(12)		(12)
Total other (expense) income, net	(447)	(415)	(880)	(816)
(Loss) income before income taxes	(1,494)	(2,575)	(3,309)	(4,928)
Income tax expense		0		0
Net (loss) income	$ (1,494)	$ (2,575)	$ (3,309)	$ (4,928)