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Note 8 - Line of Credit and Long-term Debt (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Schedule of Maturities of Long-term Debt [Table Text Block] |
Year ending December 31, |  |  |  |
2021 |  | $ | 7,746 |
2022 |  |  | 3,176 |
2023 |  |  | 2,840 |
Total future principal payments |  |  | 13,762 |
Less: Unamortized debt issuance costs |  |  | (173 | )
Less: Current portion of long-term debt |  |  | (7,701 | )
Long-term debt, net of current portion |  | $ | 5,888 |

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