Unaudited Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 30, 2021	Nov. 30, 2020	Nov. 30, 2021	Nov. 30, 2020
Income Statement [Abstract]
Net sales	$ 102,968	$ 92,443	$ 300,349	$ 268,051
Type of revenue [extensible list]	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
Cost of goods sold	$ 73,768	$ 64,355	$ 213,062	$ 190,901
Type of cost, good or service [extensible list]	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember	us-gaap:ProductMember
Gross profit margin	$ 29,200	$ 28,088	$ 87,287	$ 77,150
Selling, general and administrative	17,513	16,690	54,523	51,348
Gain from disposal of assets	1	(159)	(275)	(571)
Income from operations	11,686	11,557	33,039	26,373
Other expense
Interest expense	(3)	(2)	(7)	(8)
Other, net	(878)	(253)	(1,136)	(731)
Total other expense	(881)	(255)	(1,143)	(739)
Earnings before income taxes	10,805	11,302	31,896	25,634
Income tax expense	3,242	2,939	9,569	6,665
Net earnings	$ 7,563	$ 8,363	$ 22,327	$ 18,969
Weighted average common shares outstanding
Basic	26,020,210	25,974,006	26,053,898	25,978,461
Diluted	26,020,210	25,974,006	26,151,480	25,978,461
Earnings per share
Basic	$ 0.29	$ 0.32	$ 0.86	$ 0.73
Diluted	0.29	0.32	0.85	0.73
Cash dividends per share	$ 0.250	$ 0.225	$ 0.725	$ 0.675