Note 3 - Acquisition of SynGen Inc.- Supplemental Pro Forma Data (Details) - SynGen [Member] - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2017
Net revenues	$ 3,758,000	$ 7,138,000
Net loss	$ (1,712,000)	$ (3,960,000)
Basic and diluted net loss per common share (in dollars per share)	$ (0.17)	$ (0.40)