Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Feb. 29, 2024	May 31, 2023
Statement of Financial Position [Abstract]
Accounts receivable, allowances	$ 2,560	$ 2,150
Preferred stock, par value (in usd per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	75,000,000	75,000,000
Common stock, shares issued (in shares)	40,794,533	39,981,422
Common stock, shares outstanding (in shares)	40,424,533	39,611,422
Treasury stock, shares (in shares)	370,000	370,000