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Stock Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
 

Number

of shares

  

Weighted-Average

Exercise Price

  

Weighted-Average Remaining Contractual Term

(in years)

  

Aggregate Intrinsic Value

(in thousands)
   

Outstanding at December 31, 2014

1,371,354

 

$

5.97

 

5.7

 

 

 

Forfeited

(184,798)

    

4.31

         

Expired

(20,364)

 

 

23.41

 

  

 

 

 
                   

Outstanding at December 31, 2015

1,166,192

 

$

5.93

 

4.7

 

 

 

Expired

(36,610)

 

 

23.88

 

  

 

 

 
                   

Outstanding at December 31, 2016

1,129,582

 

$

5.35

 

3.8

 

$

-
                   

Exercisable at December 31, 2016

1,129,582

 

$

5.35

 

3.8

 

$

-
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]
     

Weighted-Average

Grant Date

 Fair Value
 

Number

of shares

  
   

Outstanding at December 31, 2014

544,248

 

$

3.74

Forfeited

(97,549)

  

$

3.45

Vested

(140,442)

 

$

3.29

Granted

228,676

 

$

2.86

   

 

 

  

Outstanding at December 31, 2015

534,933

 

$

3.53

Vested

(221,745)

 

$

4.01

Granted

230,836

 

$

2.52

 

  

 

 

  

Outstanding at December 31, 2016

544,024

 

$

2.89