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Note 5 - Line of Credit and Long-term Debt - Future Principal Payments of Long-term Debt (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Less: Current portion of long-term debt | $ (3,133) | $ 0
Long-term debt | 12,032 | $ 0
Term Loan [Member] | Wells Fargo Bank, N.A. [Member] |  |
Remainder of 2020 | 1,588 |
2021 | 3,176 |
2022 | 3,176 |
2023 | 3,176 |
2024 | 4,234 |
Total future principal payments | 15,350 |
Less: Unamortized debt issuance costs | (185) |
Less: Current portion of long-term debt | (3,133) |
Long-term debt | $ 12,032 |

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