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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Inventories (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Obsolete Inventory [Roll Forward]        
Beginning balance $ 509 $ 520 $ 511 $ 518
Provision 52 41 53 48
Write offs (2) (41) (5) (46)
Ending balance $ 559 $ 520 $ 559 $ 520