Note 9 - Per Share Data - Antidilutive Securities Excluded from Computation (Details) - shares		3 Months Ended		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Antidilutive securities (in shares)			51,930		53,353
Share-Based Payment Arrangement, Option [Member]
Antidilutive securities (in shares)		231,570		229,248
Restricted Stock Units (RSUs) [Member]
Antidilutive securities (in shares)	[1]	428,566		362,360

[1] For the three months ended June 30, 2023, the total includes a weighted average of 36,384 units which are expected to settle in cash. For the six months ended June 30, 2023, the total includes a weighted average of 33,559 units which are expected to settle in cash