Note 17 - Subsequent Events (Details Textual) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Feb. 13, 2020	Dec. 31, 2019	Dec. 31, 2018
Proceeds from Issuance of Common Stock			$ 14,726
Subsequent Event [Member]
Stock Issued During Period, Shares, New Issues	2,125,000
Shares Issued, Price Per Share	$ 4
Proceeds from Issuance of Common Stock	$ 8,500
Proceeds from Issuance of Common Stock, Net	$ 7,700