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(Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Payables and Accruals [Abstract]    
Employee related expenses $ 4,085 $ 1,894
Accrued construction related expenses 226 948
Accrued professional fees 399 465
Accrued royalties 1,903 1,780
Accrued freight and delivery charges 1,978 2,556
Accrued real estate tax 605 0
Accrued utilities 207 0
Accrued income taxes 281 0
Deferred rent 0 712
Other accrued liabilities 550 37
Total accrued liabilities $ 10,234 $ 8,392