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Stockholders' Equity (Tables)
3 Months Ended
Mar. 31, 2018
Stockholders' Equity Attributable to Parent [Abstract]  
Schedule of Stock by Class [Table Text Block]
Changes in the number of shares outstanding follow:
 
Preferred Stock,
Series B
 
Common Stock,
Class A
 
Common Stock,
Class B
 
 
 
 
 
 
Balance at December 31, 2016

 
7,563,600

 
1,436,400

Issuance of Preferred Stock
104,574

 

 

Balance at March 31, 2017
104,574

 
7,563,600

 
1,436,400

 
 
 
 
 
 
Balance at December 31, 2017 and March 31, 2018
104,574

 
7,632,669

 
1,406,082