Note 11 - Earn-out Milestone Liability - Schedule of Milestone Risk-adjustment Assessment (Details)	3 Months Ended				12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015
Discount rate	9.00%	9.00%	9.00%	9.00%	9.00%	9.00%
Minimum [Member]
Estimated time to achieve (Year)	1 year 182 days	1 year 273 days	182 days	91 days	2 years	182 days
Risk-adjustment assessment	50.00%	50.00%	10.00%	10.00%	50.00%	10.00%
Maximum [Member]
Estimated time to achieve (Year)	2 years	2 years 91 days	2 years	2 years 91 days	2 years 182 days	2 years 182 days
Risk-adjustment assessment	80.00%	80.00%	75.00%	75.00%	80.00%	75.00%