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Summary of Significant Accounting Policies Computation of Basic and Diluted Net loss per share (Tables)
 12 Months Ended
Dec. 31, 2013
Computation of Basic and Diluted net loss Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
The following is a reconciliation of the numerators and denominators of the basic and diluted net loss per share computations for the years ended December 31, 2013, 2012 and 2011 (in thousands, except per share amounts):
 
Year ended 31 December
 
2013
 
2012
 
2011
Net loss (Numerator):
 
 
 
 
 
Net loss, basic & diluted
$
(17,610
)
 
$
(12,818
)
 
$
(13,000
)
Shares (Denominator):
 
 
 
 
 
Weighted average common shares outstanding
43,092

 
42,650

 
42,083

Shares used in basic computation
43,092

 
42,650

 
42,083

Common shares issuable upon exercise of stock options (treasury stock method)
—

 
—

 
—

Shares used in diluted computation
43,092

 
42,650

 
42,083

Net loss per share:
 
 
 
 
 
Basic
$
(0.41
)
 
$
(0.30
)
 
$
(0.31
)
Diluted
$
(0.41
)
 
$
(0.30
)
 
$
(0.31
)

For the years ended December 31, 2013, 2012 and 2011, the diluted net loss per share calculation is equivalent to the basic net loss per share calculation as there were no potentially dilutive stock options or RSUs due to the Company’s net loss position. The number of stock options, stock appreciation rights, restricted stock units (“RSUs”), and restricted stock awards (“RSAs”) excluded from this calculation for the years ended December 31, 2013, 2012 and 2011 was 5,472,946, 5,868,929 and 5,625,065, respectively.