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The Company and Summary of Significant Accounting Policies The Company and Summary of Significant Accounting Policies(Tables)
 12 Months Ended
Dec. 31, 2013
Accounting Policies [Abstract]  
Allowance for Credit Losses on Financing Receivables [Table Text Block]
The following table presents the changes in the allowance for doubtful accounts:
 
  
 
Years ended December 31,
(in thousands)
 
2013
 
2012
 
2011
Allowance—beginning of period
 
$
—

 
$
—

 
$
(10
)
Provisions for bad debts
 
(29
)
 
—

 
—

Provisions charged to other accounts
 
—

 
—

 
—

Recoveries from bad debts
 
13

 
—

 
10

Write-offs and other
 
10

 
—

 
—

Allowance—end of period
 
$
(6
)
 
$
—

 
$
—