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Note 11 - Equity Method Investment - TEL's Summarized Financial Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Total Assets | $ 703,954 |  | $ 703,954 |  | $ 676,716
Total Liabilities | 374,059 |  | 374,059 |  | 386,074
Other Assets [Member] |  |  |  |  |
Investment in TEL | 41,924 |  | 41,924 |  | 34,365
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member] | Transport Enterprise Leasing LLC [Member] |  |  |  |  |
Total Assets | 350,253 |  | 350,253 |  | 374,591
Total Liabilities | 273,870 |  | 273,870 |  | 318,743
Total Equity | 76,383 |  | 76,383 |  | 55,848
Revenue | 27,626 | $ 22,984 | 76,063 | $ 72,202 |
Cost of Sales | 3,030 | 2,748 | 6,263 | 10,332 |
Operating Expenses | 16,214 | 15,184 | 45,156 | 51,708 |
Operating Income | 8,382 | 5,052 | 24,644 | 10,162 |
Net Income | 6,572 | $ 2,729 | 19,191 | $ 2,308 |
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member] | Transport Enterprise Leasing LLC [Member] | Driver Advances and Other Receivable [Member] |  |  |  |  |
Accounts receivable from TEL | $ 830 |  | $ 830 |  | $ 661

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