INVENTORIES (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
INVENTORIES
Raw materials	$ 12,985	$ 11,945
Work-in-process	6,611	6,305
Finished goods	3,789	3,538
Gross inventories	23,385	21,788
Less: Reserve for excess and obsolete inventory	(2,655)	(2,509)
Net inventories	$ 20,730	$ 19,279

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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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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