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Note 8 - Trade Accounts and Financing Receivables | 12 Months Ended
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Sep. 30, 2025
Notes to Financial Statements |
Loans, Notes, Trade and Other Receivables Disclosure [Text Block] | 8. Trade Accounts and Financing Receivables Trade accounts receivable, net (excluding financing receivables) are reflected in the following table (in thousands):
|  | AS OF SEPTEMBER 30, |
|  | 2025 |  |  | 2024 |
Trade accounts receivable |  | $ | 12,725 |  |  | $ | 16,151 |
Allowance for credit losses |  |  | (63 | ) |  |  | (4 | )
Total |  |  | 12,662 |  |  |  | 16,147 |
Less current portion |  |  | (12,662 | ) |  |  | (14,637 | )
Non-current trade accounts receivable |  | $ | — |  |  | $ | 1,510 |
Allowances for credit losses related to trade accounts receivable are reflected in the following table (in thousands):
|  | AS OF SEPTEMBER 30, |
|  | 2025 |  |  | 2024 |
Allowance for credit losses: |  |  |  |  |  |  |  |
Beginning of period |  |  | 4 |  |  |  | 125 |
Provision for credit losses |  |  | 69 |  |  |  | 65 |
Recoveries |  |  | (3 | ) |  |  | (175 | )
Charge offs, net |  |  | (6 | ) |  |  | (11 | )
Currency translation |  |  | (1 | ) |  |  | — |
End of period |  | $ | 63 |  |  | $ | 4 |
Trade accounts receivable balances are charged off against the allowance whenever it is probable that the receivable balance will not be recoverable. Financing receivables are reflected in the following table (in thousands):
|  | AS OF SEPTEMBER 30, |
|  | 2025 |  |  | 2024 |
Promissory notes |  | $ | 19,149 |  |  | $ | 12,996 |
Sales-type lease |  |  | 5,302 |  |  |  | — |
Total financing receivables |  |  | 24,451 |  |  |  | 12,996 |
Discount to fair value and unearned income |  |  | (914 | ) |  |  | (900 | )
Total financing receivables, net |  |  | 23,537 |  |  |  | 12,096 |
Less current portion |  |  | (15,347 | ) |  |  | (7,231 | )
Non-current financing receivables |  | $ | 8,190 |  |  | $ | 4,865 |
In September 2025, the Company entered into a $3.9 million promissory note with a customer related to a product sale. The note bears interest at 8.75% per annum and matures in September 2028. Principal and interest installments of $0.1 million are due monthly beginning in October 2025. The note is collateralized by the product sold. In August 2025, the Company entered into a $3.6 million promissory note with a customer related to a product sale. The note bears interest at 8.75% per annum and matures in August 2028. Principal and interest installments of $0.1 million are due monthly beginning in September 2025. The note is collateralized by the product sold. In November 2024, the Company entered into a sales-type lease with a customer on wireless seismic equipment from its rental fleet. The lease matures in October 2025. Interest income of $0.6 million was recognized on the lease for the fiscal year ended September 30, 2025. Ownership of the equipment will transfer to the customer at the end of the lease term. In August 2024, the Company entered into a $9.4 million promissory note with a customer related to a product sale. The note bears interest at 9.5% per annum and matures in December 2025. Principal and interest installments of $0.9 million are due monthly beginning in January 2025. The note is collateralized by the product sold. In August 2024, the Company entered into a $3.5 million promissory note with the buyer of its Russian subsidiary. The note is bears interest at 5% per annum and is for a 10-year term. Principal and interest installments of $37,000 are due monthly beginning in November 2024. Based on a fair value analysis performed at the date of sale, a discount to fair value of $0.9 million was placed on the note. Interest income on the amortization of the discount will be recognized under the effective interest method. Credit quality indicators used for the non-current portion of trade accounts and notes receivable consisted of historical collection experience, internal credit risk grades and collateral. The Company determines the allowance for credit losses through a review of several factors, including historical collection experience, customer credit worthiness, current aging of customer accounts and current financial conditions of its customers.

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- Definition The entire disclosure for claims held for amounts due to entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/310-10/tableOfContent Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482925/835-30-45-2 + Details
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