SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Inventories (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Obsolete Inventory [Roll Forward]
Beginning balance	$ 511	$ 518	$ 507
Provision	129	48	100
Write Offs	24	55	89
Ending balance	$ 616	$ 511	$ 518