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Fair Value Measurements (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Liabilities: |  |
Notes payable | $ 1,891 | $ 1,944
Business acquisition contingent consideration | 746 | 0
Carrying Value |  |
Liabilities: |  |
Trade receivables, net | 1,307 | 538
Equipment financing receivables | 1,161 | 1,192
Finance lease obligations | 367 | 84
Notes payable | 1,891 | 1,944
Business acquisition contingent consideration | 746 | 0
Estimated Fair Value |  |
Liabilities: |  |
Trade receivables, net | 1,307 | 538
Equipment financing receivables | 1,161 | 1,192
Finance lease obligations | 367 | 84
Notes payable | 1,891 | 1,944
Business acquisition contingent consideration | $ 746 | $ 0

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