Unaudited Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 30, 2017	Nov. 30, 2016	Nov. 30, 2017	Nov. 30, 2016
Income Statement [Abstract]
Net sales	$ 93,606	$ 88,660	$ 283,083	$ 270,316
Cost of goods sold	63,722	63,368	192,493	191,292
Gross profit margin	29,884	25,292	90,590	79,024
Selling, general and administrative	16,699	15,833	51,167	47,961
(Gain) loss from disposal of assets	(4)	264	59	266
Income from operations	13,189	9,195	39,364	30,797
Other income (expense)
Interest expense	(163)	(172)	(557)	(405)
Other, net	108	88	238	92
Total other expense	(55)	(84)	(319)	(313)
Earnings from continuing operations before income taxes	13,134	9,111	39,045	30,484
Income tax expense	4,860	3,371	14,447	11,277
Earnings from continuing operations	8,274	5,740	24,598	19,207
Income from discontinued operations, net of tax				2,481
Loss on sale of discontinued operations, net of tax				(26,042)
Loss from discontinued operations, net of tax				(23,561)
Net earnings (loss)	$ 8,274	$ 5,740	$ 24,598	$ (4,354)
Weighted average common shares outstanding
Basic	25,360,452	25,673,824	25,387,389	25,802,658
Diluted	25,393,482	25,683,613	25,409,259	25,818,146
Earnings (loss) per share - basic and diluted
Continuing operations	$ 0.33	$ 0.22	$ 0.97	$ 0.74
Discontinued operations				(0.91)
Net earnings (loss)	0.33	0.22	0.97	(0.17)
Cash dividends per share	$ 0.200	$ 0.175	$ 0.575	$ 2.025