Note 19 - Subsequent Events (Details Textual) - USD ($) $ in Thousands		1 Months Ended	2 Months Ended	12 Months Ended
	Mar. 20, 2019	Sep. 30, 2021	Feb. 24, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Stock Issued During Period, Shares, New Issues (in shares)	1,200,000
Proceeds from Issuance of Common Stock	$ 2,500			$ 0	$ 9,175	$ 2,540
The September 2021 ATM [Member]
Stock Issued During Period, Shares, New Issues (in shares)		0
The September 2021 ATM [Member] | Subsequent Event [Member]
Stock Issued During Period, Shares, New Issues (in shares)			216,000
Proceeds from Issuance of Common Stock			$ 1,000