Summary of Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
Apr. 30, 2026	Apr. 30, 2025
Disaggregation of Revenue [Line Items]
Revenue	$ 63,227	$ 69,811
NEW YORK
Disaggregation of Revenue [Line Items]
Revenue	45,651	53,269
CALIFORNIA
Disaggregation of Revenue [Line Items]
Revenue	21,731	18,660
UNITED STATES
Disaggregation of Revenue [Line Items]
Revenue	(4,155)	(2,118)
POC Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue	57,684	65,791
POC Revenue [Member] \| NEW YORK
Disaggregation of Revenue [Line Items]
Revenue	40,263	49,585
POC Revenue [Member] \| CALIFORNIA
Disaggregation of Revenue [Line Items]
Revenue	17,421	16,206
POC Revenue [Member] \| UNITED STATES
Disaggregation of Revenue [Line Items]
Revenue	0	0
POT Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue	5,543	4,020
POT Revenue [Member] \| NEW YORK
Disaggregation of Revenue [Line Items]
Revenue	5,388	3,684
POT Revenue [Member] \| CALIFORNIA
Disaggregation of Revenue [Line Items]
Revenue	4,310	2,454
POT Revenue [Member] \| UNITED STATES
Disaggregation of Revenue [Line Items]
Revenue	$ (4,155)	$ (2,118)

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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+ Details