Variable Interest Entity - Summary of Revenues and Expenses Included in Consolidated Statements of Operations and Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	May 31, 2021	May 31, 2020
Variable Interest Entity [Line Items]
Net sales	$ 137,060	$ 71,987
Cost of sales	100,365	52,012
Gross profit	36,695	19,975
Selling	11,467	8,567
General and administrative	19,352	14,995
Engineering and technical support	6,232	4,485
Total operating expenses	37,051	28,047
Operating loss	(356)	(8,072)
Interest and bank charges	(528)	(799)
Other, net	442	685
Total other income, net	2,637	748
Income (loss) before income taxes	2,281	(7,324)
Income tax expense	484	1,781
Net income (loss)	1,797	(9,105)
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Net sales	205	97
Cost of sales	163	119
Gross profit	42	(22)
Selling	163	177
General and administrative	344	429
Engineering and technical support	1,487	1,155
Total operating expenses	1,994	1,761
Operating loss	(1,952)	(1,783)
Interest and bank charges	(401)	(354)
Total other income, net	(401)	(354)
Income (loss) before income taxes	(2,353)	(2,137)
Net income (loss)	$ (2,353)	$ (2,137)