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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Inventories (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Obsolete Inventory [Roll Forward]    
Beginning balance $ 616 $ 511
Provision 0 1
Write Offs 5 3
Ending balance $ 611 $ 509