Note 12 - Commitments - Future Minimum Lease Payments (Details) - USD ($) $ in Thousands	Jul. 31, 2022	Apr. 30, 2022	Oct. 31, 2021
2022 (excluding nine months ended July 31, 2022)	$ 267
Current portion of operating lease liabilities	1,576		$ 832
Lessee, Operating Lease, Liability, to be Paid, Year One	2,286
Operating lease liabilities	15,263		$ 675
Lessee, Operating Lease, Liability, to be Paid, Year Two	1,991
Finance lease liabilities	0
Lessee, Operating Lease, Liability, to be Paid, Year Three	1,796
Total	16,839	$ 16,800
Lessee, Operating Lease, Liability, to be Paid, Year Four	1,835
Thereafter	12,123
Total future minimum lease payments	20,298
Less imputed interest	(3,459)
Other Current Liabilities [Member]
Current portion of operating lease liabilities	$ 1,576	$ 1,600