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Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($) | Jun. 30, 2023 | Mar. 31, 2023 | Jan. 01, 2023 | Dec. 31, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | --- | --- | --- | --- | --- | ---
Factored Receivable Unpaid Principal Balance | $ 7,200,000 |  |  | $ 7,000,000.0 |  |  |
Factored Receivable, Customer Reserves | 1,700,000 |  |  | 1,400,000 |  |  |
Retained Earnings (Accumulated Deficit) | 72,492,000 |  |  | 71,808,000 |  |  |
Financing Receivable, Allowance for Credit Loss | $ 9,226,000 | $ 10,032,000 |  | 8,129,000 | $ 7,202,000 | $ 6,786,000 | $ 6,715,000
Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |  |  |
Off-Balance-Sheet, Credit Loss, Liability |  |  | $ 417,000 |  |  |  |
Accounting Standards Update 2016-13 [Member] |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss |  |  | 8,129,000 | 8,129,000 |  |  |
Off-Balance-Sheet, Credit Loss, Liability |  |  | 0 |  |  |  |
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |  |  |
Retained Earnings (Accumulated Deficit) |  |  | (1,700,000) |  |  |  |
Financing Receivable, Allowance for Credit Loss |  |  | 1,907,000 | $ 1,907,000 |  |  |
Off-Balance-Sheet, Credit Loss, Liability |  |  | 417,000 |  |  |  |
Deferred Tax Assets, Gross |  |  | $ 604,000 |  |  |  |

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