Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Dec. 31, 2015	13,385,000
Balance at Dec. 31, 2015	$ 24,214	$ 66,562	$ (254)	$ 90,522
Net income		5,259		5,259
Other comprehensive income (loss), net of tax			(405)	(405)
Comprehensive income				4,854
Dividend on common stock		(1,603)		(1,603)
Restricted stock granted, net (in shares)	53,000
Restricted stock granted, net	$ 84			84
Stock options exercised (in shares)	2,000
Stock options exercised	$ 10			10
Compensation expense associated with stock options	24			24
Compensation expense associated with restricted stock, net of cash paid for shares surrendered for tax-withholding purposes	$ 215			215
Stock issued under employee plans
Balance (in shares) at Dec. 31, 2016	13,440,000
Balance at Dec. 31, 2016	$ 24,547	70,218	(659)	94,106
Net income		7,344		7,344
Other comprehensive income (loss), net of tax			393	393
Comprehensive income				7,737
Dividend on common stock		(1,862)		(1,862)
Restricted stock granted, net (in shares)	37,000
Restricted stock granted, net
Stock options exercised (in shares)	52,000			51,900
Stock options exercised	$ 245			$ 245
Compensation expense associated with stock options	23			23
Compensation expense associated with restricted stock, net of cash paid for shares surrendered for tax-withholding purposes	$ 196			196
Stock issued pursuant to public offering, net of underwriting discounts and expenses of $1.7 million (in shares)	2,738,000
Stock issued pursuant to public offering, net of underwriting discounts and expenses of $1.7 million	$ 26,778			26,778
Stock compensation grants (in shares)	5,000
Stock issued under employee plans	$ 41			$ 41
Balance (in shares) at Dec. 31, 2017	16,272,000			16,271,563
Balance at Dec. 31, 2017	$ 51,830	75,700	(266)	$ 127,264
Net income		15,730		15,730
Other comprehensive income (loss), net of tax			(2,690)	(2,690)
Comprehensive income				13,040
Dividend on common stock		(2,437)		(2,437)
Restricted stock granted, net (in shares)	20,000
Restricted stock granted, net
Stock options exercised (in shares)	37,000			37,100
Stock options exercised	$ 216			$ 216
Compensation expense associated with stock options	8			8
Compensation expense associated with restricted stock, net of cash paid for shares surrendered for tax-withholding purposes	$ 185			185
Stock compensation grants (in shares)	5,000
Stock issued under employee plans	$ 45			45
Reclassification of accumulated other comprehensive income due to tax rate change		52	(52)
Balance (in shares) at Dec. 31, 2018	16,334,000			16,333,502
Balance at Dec. 31, 2018	$ 52,284	$ 89,045	$ (3,008)	$ 138,321