Note 13 - Acquisitions - Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Total revenue	$ 37,728	$ 32,353
Net income (loss)	$ (3,160)	$ (3,397)
Basic and diluted (in dollars per share)	$ (0.16)	$ (0.20)