Note 2 - Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2018

Notes Tables

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

	March 31,
	2018		2017
Warrants to purchase common stock - liability classified (see Note 6)		7,192,373		14,017,373
Warrant to purchase common stock - equity classified		1,393		1,393
2017 Notes		–		47,827
2020 Notes		28,093,500		–
2022 Notes		–		688
Outstanding options to purchase common stock		46,431		76,915
Unvested restricted common stock		2,204		7,536
Total		35,335,901		14,151,732