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Liquidity and Earnings (Loss) Per Share (Tables)
 6 Months Ended 12 Months Ended
Jun. 30, 2015
Dec. 31, 2014
Earnings Per Share [Abstract]    
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Basic net (loss) and diluted net (loss) per share data were computed as follows:
 
 
 
Three months
ended
June 30,
2015
 
Six months
ended
June 30,
2015
Numerator:
 
 
  
 
 
 
  
 
Net (loss) for basic earnings per share
 
 
(3,343
) 
 
 
(7,020
) 
Less gain on change in fair value of warrant liability
 
 
—
 
 
 
791
 
Net (loss) for diluted earnings per share
 
 
(3,343
) 
 
 
(7,811
) 
Denominator:
 
 
  
 
 
 
  
 
Weighted-average basic common shares outstanding
 
 
6,849
 
 
 
6,811
 
Assumed conversion of dilutive securities:
 
 
  
 
 
 
  
 
Common stock purchase warrants
 
 
—
 
 
 
40
 
Denominator for dilutive earnings per share – adjusted
weighted-average shares
 
 
6,849
 
 
 
6,851
 
Basic net (loss) per share
 
$
(0.49
) 
 
$
(1.03
) 
Diluted net (loss) per share
 
$
(0.49
) 
 
$
(1.14
) 
 
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
The following table summarizes potentially dilutive shares outstanding as of June 30, 2015, which were excluded from the calculation due to being anti-dilutive:
 
 
 
2015
Common stock purchase warrants
 
 
1,782
 
Stock options
 
 
748
 
Restricted shares of common stock
 
 
—
 
The following table summarizes potentially dilutive shares outstanding as of December 31, 2014, which were excluded from the calculation due to being anti-dilutive:
 
 
 
2014
 
2013
Common stock purchase warrants
 
 
1,782
 
 
 
22
 
Stock options
 
 
1,245
 
 
 
750
 
Restricted shares of common stock
 
 
100
 
 
 
51