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Inventory (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
Allowance for obsolescence	$ 3,371	$ 19
Raw materials - current	23,893	26,152
Raw materials - long term, net	540	3,980
Finished Goods	1,022	1,022
Work in process	5,374	3,800
Inventory, net	$ 30,829	$ 34,954

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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.

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Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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