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ACCOUNTS RECEIVABLE (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Accounts receivable |  |
Trade receivables | $ 2,319 | $ 2,397
Other | 4,308 | 1,500
Total | 6,627 | 3,897
Less: allowance for doubtful accounts | (20) | (25)
Net accounts receivable | $ 6,607 | $ 3,872

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