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Revenue - Components of Accounts Receivable (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
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Revenue from Contract with Customer [Abstract] |  |
Trade receivables | $ 5,496 | $ 6,425
Unbilled receivables | 1,886 | 1,857
Other short-term receivables | 33 | 7
Allowance for doubtful accounts | (1,795) | (1,816)
Total accounts receivable | $ 5,620 | $ 6,473

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- Definition Amount, after allowance, receivable from customers, clients, or other third-parties, and receivables classified as other due within one year or the normal operating cycle, if longer. + References No definition available. + Details
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