Note 17 - Equity Offerings (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

Schedule of Sales Under Sales Agency Agreement [Table Text Block]

	2019 ATM Offering		2019 ATM Offering		2020 ATM Offering
	For the year ended		For the year ended		For the year ended
	December 31, 2019		December 31, 2020		December 31, 2020
Total shares of common stock sold		1,374,686		6,687,846		16,320,793
Average price per share	$	5.23	$	1.73	$	0.58
Gross proceeds	$	7,193	$	11,558	$	9,264
Commissions earned by Cantor	$	212	$	347	$	278
Net Proceeds	$	6,981	$	11,211	$	8,986