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Accrued and Other Expenses (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Payables and Accruals [Abstract]    
Employee related expenses $ 2,233 $ 1,894
Accrued construction related expenses 188 948
Accrued professional fees 750 465
Accrued royalties 2,419 1,780
Accrued freight and delivery charges 882 2,556
Deferred rent 0 712
Other accrued liabilities 437 (355)
Total accrued liabilities 8,578 8,392
accrued equipment expense 429 0
Accrual for Taxes Other than Income Taxes, Current 806 0
Accrued Utilities, Current 10 327
Sales and Excise Tax Payable, Current $ 424 $ 65