Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2023	Feb. 28, 2022	Feb. 28, 2023	Feb. 28, 2022
Income Statement [Abstract]
Net sales	$ 80,712	$ 73,970	$ 247,678	$ 229,221
Cost of sales (exclusive of intangible amortization)	40,208	35,387	119,791	109,944
Gross profit	40,504	38,583	127,887	119,277
Operating expenses:
Research and development	6,852	7,280	22,023	22,873
Sales and marketing	25,406	20,416	77,956	68,468
General and administrative	8,839	8,727	29,775	27,348
Amortization of intangibles	4,739	4,895	14,384	14,605
Change in fair value of contingent consideration	227	201	2,084	1,005
Acquisition, restructuring and other items, net	3,369	2,359	12,009	7,052
Total operating expenses	49,432	43,878	158,231	141,351
Operating loss	(8,928)	(5,295)	(30,344)	(22,074)
Other expense:
Interest expense, net	(736)	(173)	(1,801)	(503)
Other expense, net	0	(289)	(427)	(651)
Total other expense, net	(736)	(462)	(2,228)	(1,154)
Loss before income tax benefit	(9,664)	(5,757)	(32,572)	(23,228)
Income tax benefit	(179)	(799)	(1,597)	(2,947)
Net loss	$ (9,485)	$ (4,958)	$ (30,975)	$ (20,281)
Loss per share
Loss per share, basic (USD per share)	$ (0.24)	$ (0.13)	$ (0.79)	$ (0.52)
Loss per share, diluted (USD per share)	$ (0.24)	$ (0.13)	$ (0.79)	$ (0.52)
Weighted average shares outstanding
Basic weighted average shares outstanding (in shares)	39,509	39,092	39,436	38,959
Diluted weighted average shares outstanding (in shares)	39,509	39,092	39,436	38,959