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Accrued and Other Expenses (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Payables and Accruals [Abstract] |  |
Employee related expenses | $ 1,048 | $ 2,233
Accrued construction related expenses | 0 | 188
Accrued equipment | 55 | 429
Accrued professional fees | 1,129 | 750
Accrued royalties | 2,624 | 2,419
Accrued freight and delivery charges | 2,901 | 882
Accrued real estate tax | 1,637 | 806
Accrued utilities | 748 | 10
Sales tax liability | 1,386 | 424
Other accrued liabilities | 1,614 | 437
Total accrued liabilities | $ 13,142 | $ 8,578

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