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Cash and Cash Equivalents and Short-term Investments (Tables)
 12 Months Ended
Dec. 31, 2012
Cash and Cash Equivalents [Abstract]  
Available-for-sale Securities
Our short-term investments consisted of available-for-sale equity securities at December 31 (in thousands):
 
December 31,
Equity Security
2012
 
2011
Cost
$
327

 
$
405

Gross unrealized loss
(130
)
 
(235
)
Fair value
$
197

 
$
170