INVENTORIES (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
INVENTORIES
Parts and raw materials	$ 21,479us-gaap_InventoryRawMaterials	$ 21,573us-gaap_InventoryRawMaterials
Work-in-process	3,234us-gaap_InventoryWorkInProcess	2,924us-gaap_InventoryWorkInProcess
Finished goods	3,931us-gaap_InventoryFinishedGoods	4,403us-gaap_InventoryFinishedGoods
Inventory, gross	28,644us-gaap_InventoryGross	28,900us-gaap_InventoryGross
Less reserves	(3,527)us-gaap_InventoryValuationReserves	(3,529)us-gaap_InventoryValuationReserves
Inventories, net	$ 25,117us-gaap_InventoryNet	$ 25,371us-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.

+ References

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-Publisher SEC

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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.

+ References

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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.

+ References

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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.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

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-Topic 210

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

-Publisher SEC

-Name Regulation S-X (SX)

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