Changes In Stockholders' Equity (Schedule of Changes in Stockholders' Equity) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Increase (Decrease) in Stockholders' Equity [Roll Forward]
BALANCE	$ 65,528	$ 58,324
BALANCE, shares	7,294,617
Exercise of stock options, net of shares exchanged as payment	$ 57	85
Exercise of stock options, net of shares exchanged as payment, shares	7,250
Share-based compensation	$ 334	272
Other comprehensive loss, net of tax	(204)	(490)
Net income	1,441	844
BALANCE	$ 67,156	59,035
BALANCE, shares	7,299,376
Common Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
BALANCE	$ 37,817	$ 36,659
BALANCE, shares	7,295,000	7,155,000
Exercise of stock options, net of shares exchanged as payment	$ 57	$ 85
Exercise of stock options, net of shares exchanged as payment, shares	4,000	10,000
Share-based compensation	$ 334	$ 272
Other comprehensive loss, net of tax	0	0
Net income	0	0
BALANCE	$ 38,208	$ 37,016
BALANCE, shares	7,299,000	7,165,000
Accumulated Other Comprehensive Loss [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
BALANCE	$ (1,102)	$ (1,406)
Exercise of stock options, net of shares exchanged as payment	0	0
Share-based compensation	0	0
Other comprehensive loss, net of tax	(204)	(490)
Net income	0	0
BALANCE	(1,306)	(1,896)
Retained Earnings [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
BALANCE	28,813	23,071
Exercise of stock options, net of shares exchanged as payment	0	0
Share-based compensation	0	0
Other comprehensive loss, net of tax	0	0
Net income	1,441	844
BALANCE	$ 30,254	$ 23,915