NATURE OF OPERATIONS, ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) $ in Thousands	12 Months Ended
	Apr. 30, 2025 USD ($)	Apr. 30, 2025 USD ($)	Apr. 30, 2025 USD ($)	Apr. 30, 2025 USD ($) segment	Apr. 30, 2024 USD ($)	Jan. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)
Product Information [Line Items]
Duration after which invoices are considered to be doubtful (Day)	90 days
Duration during which inventory if inactive taken as obsolete (Year)	5 years
Depreciation		$ 4,569			$ 4,110
Miscellaneous other assets	$ 127	127	$ 127	$ 127	128
Period for payment due (Day)	30 days
Cash, uninsured amount	$ 2,514	2,514	$ 2,514	$ 2,514	1,955
Research and development expense		952			823
Advertising expense		2,595			4,044
Number of operating segments			2	2
Minimum
Product Information [Line Items]
Aircraft modifications payments percentage			25
Maximum
Product Information [Line Items]
Aircraft modifications payments percentage			0.50
Kansas Lottery Commission and the Kansas Racing and Gaming Commission
Product Information [Line Items]
Accrued liabilities	2,684	2,684	$ 2,684	$ 2,684	2,436
Kansas Expanded Lottery Act Management Contract Privilege Fee
Product Information [Line Items]
Finite-lived intangible assets, gross	5,500	5,500	5,500	5,500	5,500
Gaming Equipment
Product Information [Line Items]
Finite-lived intangible assets, gross	$ 7,884	$ 7,884	$ 7,884	$ 7,884	7,215
Finite-lived intangible asset, useful life (Year)	3 years	3 years	3 years	3 years
JET Autopilot Intellectual Property
Product Information [Line Items]
Finite-lived intangible assets, gross	$ 0	$ 0	$ 0	$ 0	1,417	$ 1,417
Other Miscellaneous Long-Term Assets
Product Information [Line Items]
Finite-lived intangible assets, gross							$ 5,500
Amortization of intangible assets		$ 837			751
Supplemental Type Certificates
Product Information [Line Items]
Finite-lived intangible asset, useful life (Year)	7 years	7 years	7 years	7 years
Amortization of intangible assets		$ 1,209			$ 1,207
Supplemental Type Certificates, Work In Progress
Product Information [Line Items]
Amortization of intangible assets		$ 529