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NATURE OF OPERATIONS - Condensed Consolidated Cash Flows (Details) - USD ($) $ in Thousands | 6 Months Ended
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Jun. 30, 2020 | Jun. 30, 2019
Operating activities: |  |
Net income | $ 19,063 | $ 15,846
Accounts payable | (2,560) | 934
Accrued liabilities | 6,412 | 1,449
Net cash used in operating activities | (5,266) | $ 3,341
Error corrections in accounts payable and cost of goods sold |  |
Operating activities: |  |
Net income | 19,063 |
Accounts payable | (2,560) |
Accrued liabilities | 6,412 |
Net cash used in operating activities | (5,266) |
As Originally Reported | Error corrections in accounts payable and cost of goods sold |  |
Operating activities: |  |
Net income | 17,619 |
Accounts payable | (691) |
Accrued liabilities | 5,987 |
Net cash used in operating activities | (5,266) |
Adjustments | Error corrections in accounts payable and cost of goods sold |  |
Operating activities: |  |
Net income | 1,444 |
Accounts payable | (1,869) |
Accrued liabilities | $ 425 |

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