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Detail of Selected Balance Sheet Accounts (Details 2) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Gross $ 30,387 $ 25,844
Less accumulated depreciation (15,798) (14,388)
Total 14,589 11,456
Land [Member]    
Gross 2,476 2,476
Buildings [Member]    
Gross 8,712 8,501
Machinery and Equipment [Member]    
Gross [1] $ 19,199 $ 14,867
[1] This includes finance leases. See Note 11 for more details.