Loss Per Share (Tables)

6 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

Such excluded shares are summarized as follows:

	Three month period				Six month period
	ended June 30,				ended June 30,
	2018		2017		2018		2017
Common stock options		575,597		490,541		575,597		490,541
Shares issuable upon conversion of Series E Preferred Stock (not including dividends)		16,171,200		-		16,171,200		-
Shares potentially issuable upon conversion of May 2018 convertible notes (assuming $0.375 price)		7,416,667		-		7,416,667		-
Shares potentially issuable upon conversion of April 2017 convertible notes (assuming $1.00 floor price)		-		305,000		-		305,000
Shares potentially issuable upon conversion of May 2017 convertible notes (assuming $1.00 floor price)		-		2,344,354		-		2,344,354
Warrants		19,170,344		715,413		19,170,344		715,413
Total shares excluded from calculation		43,333,808		3,855,308		43,333,808		3,855,308