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Inventories (Tables)
6 Months Ended
Jun. 30, 2013
Inventory Disclosure [Abstract]  
Schedule Of Inventories
 
June 30,
2013
 
December 31,
2012
Finished goods and demonstration equipment
$
2,276

 
$
2,677

Purchased parts and subassemblies
2,891

 
3,359

Total inventories
$
5,167

 
$
6,036