Note 10 - Equity Incentive Plans (Tables)

9 Months Ended

Sep. 30, 2021

Stock Incentive Plan 2010 [Member]

Notes Tables

Nonvested Restricted Stock Shares Activity [Table Text Block]

Period	Total Number of Restricted Shares Issued			Total Number of Non-qualified Stock Options Granted		Vesting Periods Years
January 1, 2021 to March 31, 2021	(121,499	)	(1)	—			N/A
April 1, 2021 to June 30, 2021	(89,673	)	(2)(3)	—		0	to	4
July 1, 2021 to September 30, 2021	3,915,502		(2)(4)(6)	4,668,727	(5)(7)	2	to	3
Total	3,704,330			4,668,727