Note 14 - Warrants (Tables)

6 Months Ended

Jun. 30, 2016

Notes Tables

Schedule of Warrant Activity [Table Text Block]

Warrants	Number of Warrants Issued			Weighted Average Exercise Price
Warrants outstanding at December 31, 2015		5,894,675		$	6.37
Warrants issued during the six months ended June 30, 2016 (see Note 11)		10,923,528			1.13
Warrants expired during the six months ended June 30, 2016		–
Warrants outstanding at June 30, 2016		16,818,203		$	2.97
Aggregate intrinsic value of outstanding warrants at June 30, 2016	$	2,646,000
Weighted average remaining contractual terms at June 30, 2016 (in years)		2.86	(1)