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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Inventories (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Obsolete Inventory [Roll Forward]        
Beginning balance $ 559 $ 520 $ 511 $ 518
Provision 35 (2) 88 47
Write offs (13) (4) (18) (51)
Ending balance $ 581 $ 514 $ 581 $ 514