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Note 15 - Commitments and Contingencies (Tables) | 3 Months Ended
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Mar. 31, 2021
Notes Tables |
Financing Receivable, Current, Allowance for Credit Loss [Table Text Block] |
|  | For the Three Months Ended March 31, |
|  | 2021 |  |  | 2020 |
Balance at beginning of period |  | $ | 473 |  |  | $ | 127 |
Bad debt expense |  |  | 5 |  |  |  | 55 |
Write-offs |  |  | (222 | ) |  |  | (19 | )
Other adjustments |  |  | (1 | ) |  |  | (7 | )
Balance at end of period |  | $ | 255 |  |  | $ | 156 |

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