Income Taxes Components of Deferred tax asset/ liability (Tables)
 12 Months Ended
Dec. 31, 2013
Components of deferred tax asset/ liability [Abstract]  
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
As of December 31, 2013 and 2012, a valuation allowance has been recorded against 100% of gross deferred tax assets as a result of uncertainties regarding the realization of the asset balance. As of December 31, 2013 and 2012, the Company had no significant deferred tax liabilities. The components of the net deferred income tax asset are as follows (in thousands):
 
Year ended 31 December
 
2013
 
2012
Net operating loss carry forwards
$
60,961

 
$
55,669

Tax credit carry forwards
26,869

 
24,826

Fixed and intangible assets
7,246

 
7,486

Capitalized research and development costs
58

 
58

Reserves and other cumulative temporary differences
19,380

 
20,910

Gross deferred income tax assets
114,514

 
108,949

Valuation allowance
(114,514
)
 
(108,949
)
Net deferred income tax assets
$
—

 
$
—