Note 11 - Stock Option Plan (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

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

	DECEMBER 31, 201 9					DECEMBER 31, 201 8
	Shares			Weighted- Average Exercise Price		Shares			Weighted- Average Exercise Price
Outstanding at beginning of year		1,000		$	5.74		3,500		$	5.94
Granted		0		$	0.00		0		$	0.00
Exercised		(1,000	)	$	5.74		(1,500	)	$	4.58
Forfeited		0		$	0.00		(1,000	)	$	8.25
Outstanding at end of year		0		$	0.00		1,000		$	5.74

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

	DECEMBER 31, 201 9					DECEMBER 31, 201 8
	Shares			Weighted Average Grant Date Fair Value		Shares			Weighted Average Grant Date Fair Value
Unvested at beginning of year		107,600		$	20.09		24,800		$	11.07
Granted		26,095		$	17.59		96,650		$	21.40
Vested		(27,640	)	$	18.97		(11,900	)	$	11.93
Cancelled		(4,500	)	$	20.11		(1,950	)	$	20.21
Unvested at end of year		101,555		$	19.75		107,600		$	20.09

Weighted Average [Member]

Notes Tables

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

(dollars in thousands)	December 31,
	201 9		201 8
Weighted-average fair value of options granted during the year		N/A		N/A
Intrinsic value of options exercised	$	12	$	20
Options outstanding and exercisable at year end:		0		1,000
Weighted average exercise price		N/A	$	5.74
Intrinsic value		N/A	$	13
Weighted average remaining contractual life		N/A	1 month