Selling, General and Administrative Expenses - Summary of Selling, General and Administrative Expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2026	Jul. 31, 2025
Selling, General and Administrative Expense [Abstract]
Salaries and directors' fees	$ 256	$ 243
Office and administrative	136	642
Professional fees and insurance	341	255
Transfer agent and regulatory fees	153	130
Stock-based compensation	78	62
Selling, general and administration expense	$ 964	$ 1,332

The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.