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Inventories
3 Months Ended
Mar. 31, 2015
Inventory Disclosure [Abstract]  
Inventory Disclosure [Text Block]

4.   Inventories


Inventories consist of the following (in thousands):


 

March 31,

 

December 31,

 

2015

 

2014

Raw materials

 $                 2,559

 

 $                 2,744

Work in process

                    1,047

 

                       902

Finished goods

                    2,426

 

                    2,652

Inventories

 $                 6,032

 

 $                 6,298