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Common Stock and Earnings Per Share (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Nov. 08, 2019	Mar. 11, 2013
Common Stock and Earnings Per Share [Abstract]
Net income	$ 16,598	$ 14,402
Shares Used in Computing Basic and Diluted Earnings per Share [Abstract]
Weighted average common shares, basic (in shares)	13,033,681	12,964,080
Effect of dilutive securities [Abstract]
Employee stock-based compensation (in shares)	839	2,212
Weighted average common shares, diluted (in shares)	13,034,520	12,966,292
Stock Repurchase Program [Abstract]
Number of shares authorized to be repurchased under the stock repurchase program (in shares)				1,200,000
Number of shares repurchased and retired under the stock repurchase program (in shares)	0	0
Number of remaining shares authorized to be repurchased under the stock repurchase program (in shares)	618,004
Employee Stock Purchase Plan [Member]
Common Stock [Abstract]
Minimum period full-time employees must be employed to purchase shares	90 days
Maximum percentage of gross compensation allowed to purchase shares	10.00%
Purchase price as a percentage of fair market value of common stock	95.00%
Number of shares issued (in shares)	3,718	3,914
Number of authorized shares remaining to be issued (in shares)	58,007
Dividend Reinvestment and Direct Stock Purchase and Sale Plan [Member]
Common Stock [Abstract]
Number of shares authorized to be issued (in shares)			157,000
Number of shares authorized, unissued, and rolled over under plan (in shares)			344,379
Number of shares issued (in shares)	37,370	60,485
Number of authorized shares remaining to be issued (in shares)	438,519
Optional Dividend Reinvestment Portion of Plan [Member]
Common Stock [Abstract]
Purchase price as a percentage of fair market value of common stock	95.00%
Direct Stock Purchase Portion of Plan [Member]
Common Stock [Abstract]
Purchase price as a percentage of fair market value of common stock	100.00%

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