Note 12 - Schedule of Shares Issued (Details) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Employee Benefit Plans (Details) - Employee Stock Purchase Plan [Line Items]
Shares	4,906	5,723	3,310
Price per share			$ 33.53
Minimum [Member]
Employee Benefit Plans (Details) - Employee Stock Purchase Plan [Line Items]
Price per share	$ 27.36	$ 25.52
Maximum [Member]
Employee Benefit Plans (Details) - Employee Stock Purchase Plan [Line Items]
Price per share	$ 32.29	$ 25.56