Note 16 - Subsequent Event (Details Textual) - USD ($) $ / shares in Units, $ in Thousands		6 Months Ended
	Jul. 07, 2020	Jun. 30, 2020	Jun. 30, 2019
Proceeds from Issuance of Common Stock		$ 19,914	$ 0
Subsequent Event [Member]
Stock Issued During Period, Shares, New Issues (in shares)	5,951,250
Shares Issued, Price Per Share (in dollars per share)	$ 14.50
Proceeds from Issuance of Common Stock	$ 86,000
Subsequent Event [Member] | Over-Allotment Option [Member]
Stock Issued During Period, Shares, New Issues (in shares)	776,250