Condensed consolidated statements of operations and comprehensive income (unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Net sales	$ 72,350	$ 67,615	$ 136,877	$ 127,379
Cost of sales	25,212	24,267	46,398	46,840
Gross profit	47,138	43,348	90,479	80,539
Selling, general and administrative expenses	45,170	38,444	85,502	70,499
Restructuring income	0	(4,198)	0	(5,990)
Operating income	1,968	9,102	4,977	16,030
Other (expense) income, net	(859)	586	(889)	937
Interest expense, net	(905)	(1,643)	(2,373)	(3,360)
Income before provision for income taxes	204	8,045	1,715	13,607
Income tax benefit (provision)	243	(1,528)	244	(3,384)
Net income	447	6,517	1,959	10,223
Comprehensive income	$ 447	$ 6,517	$ 1,959	$ 10,223
Net income per share:
Basic (in USD per share)	$ 0.01	$ 0.13	$ 0.04	$ 0.21
Diluted (in USD per share)	$ 0.01	$ 0.13	$ 0.04	$ 0.20
Weighted average shares outstanding:
Basic (in shares)	49,147,366	48,419,845	49,036,519	48,383,095
Diluted (in shares)	51,748,437	50,939,915	51,344,797	50,628,704