Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2025	Oct. 31, 2024
Income Statement [Abstract]
Revenues	$ 17,127	$ 15,820	$ 30,939	$ 30,898
Cost of revenues	10,591	8,201	19,321	16,580
Gross margin	6,536	7,619	11,618	14,318
Selling and administrative expenses	3,623	3,388	7,207	6,234
Research and development expenses	1,199	1,613	2,332	3,101
Operating income	1,714	2,618	2,079	4,983
Other income (expense):
Income on investments	153	203	371	427
Interest expense	(22)	(27)	(46)	(53)
Other expense, net	(75)	(1)	(77)	(1)
Income before (benefit) provision for income taxes	1,770	2,793	2,327	5,356
(Benefit) provision for income taxes	(31)	139	(108)	272
Net income	$ 1,801	$ 2,654	$ 2,435	$ 5,084
Net income per common share:
Basic income per share (in Dollars per share)	$ 0.18	$ 0.28	$ 0.25	$ 0.53
Diluted income per share (in Dollars per share)	$ 0.18	$ 0.28	$ 0.25	$ 0.53
Weighted average shares outstanding:
Basic (in Shares)	9,759,646	9,585,357	9,741,405	9,561,848
Diluted (in Shares)	9,759,646	9,585,357	9,741,405	9,561,848