Quarterly report pursuant to Section 13 or 15(d)

Stock Holders Equity (Tables)

Stock Holders Equity (Tables)
6 Months Ended
Jun. 30, 2017
Stockholders' Equity Note [Abstract]  
Schedule of Stockholders Equity Note, Warrants or Rights [Table Text Block]
A summary of equity warrants outstanding as of June 30, 2017 is presented below, all of which are fully vested.
Total Warrants Outstanding at December 31, 2016
Warrants tendered on January 13,  2017
Warrants exercised first quarter, 2017 outside of tender offer
Warrants exercised second quarter, 2017
Total Warrants Outstanding at June 30,  2017