SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - INVENTORIES (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Notes to Financial Statements
Raw materials	$ 6,298us-gaap_InventoryRawMaterials	$ 5,787us-gaap_InventoryRawMaterials
Work in process	2,966us-gaap_InventoryWorkInProcess	2,920us-gaap_InventoryWorkInProcess
Finished goods	4,949us-gaap_InventoryFinishedGoods	4,784us-gaap_InventoryFinishedGoods
Allowance for excess or obsolete inventory	(1,555)us-gaap_InventoryValuationReserves	(1,804)us-gaap_InventoryValuationReserves
Total Inventories, net	$ 12,658us-gaap_InventoryNet	$ 11,687us-gaap_InventoryNet

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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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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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