Note 8 - Basic and Diluted (Loss) Income Per Share (Details Textual) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Weighted Average Number Diluted Shares Outstanding Adjustment, Total (in shares)	0	0	0	0
Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	1,648,609	955,792	1,714,827	857,453
Share-based Payment Arrangement, Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	349,262		276,451	43,454