Inventories, Net (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019	Dec. 31, 2018
Inventory, Gross [Abstract]
Raw materials	$ 1,117	$ 1,264	$ 1,769
Work in process	1	15	37
Finished goods	419	450	135
Inventories, gross	1,537	1,729	1,941
Less: inventory reserves	(63)	(63)	(265)
Inventories, Net	$ 1,474	$ 1,666	$ 1,676

Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount of valuation reserve for inventory.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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