CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Net sales	$ 133,231	$ 130,642	$ 310,259	$ 280,363
Cost of sales	99,768	93,183	240,468	204,417
Gross profit	33,463	37,459	69,791	75,946
Selling, general and administrative expenses	28,718	29,138	85,995	73,116
Restructuring expenses	1,050	0	3,177	0
Impairment of goodwill	0	0	1,390	0
Operating income (loss)	3,695	8,321	(20,771)	2,830
Interest expense, net	784	344	1,480	337
Other expense (income), net	(154)	99	(437)	(229)
Income (loss) before income taxes	3,065	7,878	(21,814)	2,722
Income tax expense	9,835	1,926	8,342	821
Net income (loss)	$ (6,770)	$ 5,952	$ (30,156)	$ 1,901
Weighted average shares outstanding:
Basic (in shares)	8,845	9,116	9,007	9,105
Diluted (in shares)	8,845	9,157	9,007	9,142
Net income (loss) per common share:
Basic (in dollars per share)	$ (0.77)	$ 0.65	$ (3.35)	$ 0.21
Diluted (in dollars per share)	(0.77)	0.65	(3.35)	0.21
Cash dividends per share of common stock (in dollars per share)	$ 0.2	$ 0.2	$ 0.6	$ 0.6
Net income (loss)	$ (6,770)	$ 5,952	$ (30,156)	$ 1,901
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(183)	(44)	(1,149)	566
Fair value of interest rate swap agreements	(585)	0	(109)	0
Other comprehensive income (loss)	(768)	(44)	(1,258)	566
Comprehensive income (loss)	$ (7,538)	$ 5,908	$ (31,414)	$ 2,467