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Income Taxes Provision for income taxes, Region (Tables)
 12 Months Ended
Dec. 31, 2014
Income Tax Disclosure [Abstract]  
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]
The provision for income taxes attributable to continuing operations is based upon loss from continuing operations before provision for income taxes as follows (in thousands):
 
Year ended December 31,
 
2014
 
2013
 
2012
Domestic
$
(15,592
)
 
$
(14,358
)
 
$
(13,614
)
Foreign
192

 
(70
)
 
652

 
$
(15,400
)
 
$
(14,428
)
 
$
(12,962
)