Consolidated Statements Of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Accumulated Other Comprehensive Loss [Member]	Retained Earnings [Member]
BALANCE at Dec. 31, 2019	$ 58,324	$ 36,659	$ (1,406)	$ 23,071
BALANCE, shares at Dec. 31, 2019		7,155
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options and vesting of restricted stock units, net of shares exchanged as payment	358	$ 358		0
Exercise of stock options and vesting of restricted stock units, net of shares exchanged as payment, shares		135
Tax payments related to shares withheld for share-based compensation plans	(605)	$ (605)
Tax payments related to shares withheld for share-based compensation plans, shares		(23)
Share issuances for director compensation	0	$ 0
Share issuances for director compensation, shares		8
Share-based compensation	1,181	$ 1,181
Issuance of common stock under Employee Stock Purchase Plan	224	$ 224
Issuance of common stock under Employee Stock Purchase Plan, shares		20
Other comprehensive income, net of tax	304		304
Net income	5,742			5,742
BALANCE at Dec. 31, 2020	65,528	$ 37,817	(1,102)	28,813
BALANCE, shares at Dec. 31, 2020		7,295
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options and vesting of restricted stock units, net of shares exchanged as payment	428	$ 428		0
Exercise of stock options and vesting of restricted stock units, net of shares exchanged as payment, shares		100
Tax payments related to shares withheld for share-based compensation plans	(787)	$ (787)
Tax payments related to shares withheld for share-based compensation plans, shares		(18)
Share issuances for director compensation	0	$ 0
Share issuances for director compensation, shares		8
Share-based compensation	1,347	$ 1,347
Issuance of common stock under Employee Stock Purchase Plan	247	$ 247
Issuance of common stock under Employee Stock Purchase Plan, shares		7
Other comprehensive income, net of tax	(408)		(408)
Net income	12,751			12,751
BALANCE at Dec. 31, 2021	$ 79,106	$ 39,052	$ (1,510)	$ 41,564
BALANCE, shares at Dec. 31, 2021		7,392