Note 13 - Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Share-based Payment Arrangement, Option, Activity [Table Text Block]

	Shares Under Option			Weighted- Average Exercise Price
Outstanding—January 1, 2017:		56,131		$	10.85
Granted		-			-
Exercised		(11,063	)		11.13
Canceled		-			-
Outstanding—December 31, 2017:		45,068		$	10.79
Granted		-			-
Exercised		(45,005	)		10.79
Canceled		(63	)		11.22
Outstanding—December 31, 2018:		-		$	-
Granted		-			-
Exercised		-			-
Canceled		-			-
Outstanding—December 31, 2019:		-		$	-
Options exercisable—December 31, 2019:		-		$	-

Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]

	Restricted Stock
	Number of Shares			Weighted- Average Grant Date Fair Value
Nonvested at January 1, 2019		100,917		$	23.09
Granted		2,058			48.75
Canceled/forfeited/expired		(3,500	)		36.35
Vested		(44,016	)		21.65
Nonvested at December 31, 2019		55,459		$	24.35