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Note 15 - Commitments and Contingencies (Tables) | 6 Months Ended
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Jun. 30, 2021
Notes Tables |
Financing Receivable, Current, Allowance for Credit Loss [Table Text Block] |
|  | For the Six Months Ended June 30, |
|  | 2021 |  |  | 2020 |
Balance at beginning of period |  | $ | 473 |  |  | $ | 127 |
Bad debt expense |  |  | 9 |  |  |  | 114 |
Write-offs |  |  | (429 | ) |  |  | (47 | )
Other adjustments |  |  | (1 | ) |  |  | (33 | )
Balance at end of period |  | $ | 52 |  |  | $ | 161 |

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