CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jul. 31, 2022	Apr. 30, 2022
Statement of Financial Position [Abstract]
Allowance for credit losses	$ 137	$ 129
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, authorized	20,000,000	20,000,000
Preferred stock, Issued	0	0
Preferred stock, outstanding	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, authorized	100,000,000	100,000,000
Common stock, Issued	14,291,791	14,240,290
Common stock, outstanding	13,454,827	13,403,326
Treasury stock, shares	836,964	836,964