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Note 3 - Business Combination - Business Combination Purchase Price Allocation (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Mar. 31, 2025 | Jun. 15, 2024
--- | --- | --- | ---
Goodwill | $ 12,280 | $ 12,280 |
Amplex Holdings [Member] |  |  |
Cash and cash equivalents |  |  | $ 221
Accounts receivable |  |  | 116
Materials and supplies |  |  | 537
Operating lease right-of-use |  |  | 3,063
Prepaid expenses and other assets |  |  | 265
Property, plant, and equipment |  |  | 24,584
Intangible assets |  |  | 4,133
Goodwill |  |  | 12,280
Total assets acquired |  |  | 45,199
Accounts payable |  |  | 1,252
Accrued expenses and other liabilities |  |  | 112
Lease liabilities |  |  | 3,063
Deferred income taxes |  |  | 4,208
Deferred revenue |  |  | 556
Total liabilities assumed |  |  | 9,191
Total fair value of net assets acquired |  |  | 36,008
Less: redeemable noncontrolling interest |  |  | (17,644)
Total Adjusted Base Purchase Price |  |  | $ 18,364

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