Changes In Stockholders' Equity (Schedule of Changes in Stockholders' Equity) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Increase (Decrease) in Stockholders' Equity [Roll Forward]
BALANCE			$ 48,898
BALANCE, shares			6,901,887
Increase related to adoption of ASU 2016-09	$ 285		$ 285
Exercise of stock options, vesting of restricted stock units, net of shares exchanged as payment			330
Stock-based compensation			640
Issuance of common stock under Employee Stock Purchase Plan			258
Other comprehensive income, net of tax	122	$ (152)	434	$ 199
Net income	(72)	$ 1,172	809	$ 5,476
BALANCE	$ 51,654		$ 51,654
BALANCE, shares	6,972,515		6,972,515
Common Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
BALANCE			$ 32,801
BALANCE, shares			6,902,000
Increase related to adoption of ASU 2016-09	$ 23		$ 23
Exercise of stock options, vesting of restricted stock units, net of shares exchanged as payment			$ 330
Exercise of stock options, vesting of restricted stock units, net of shares exchanged as payment, shares			53,000
Stock-based compensation			$ 640
Issuance of common stock under Employee Stock Purchase Plan			$ 258
Issuance of common stock under Employee Stock Purchase Plan, shares			18,000
Other comprehensive income, net of tax			$ 0
Net income			0
BALANCE	$ 34,052		$ 34,052
BALANCE, shares	6,973,000		6,973,000
Accumulated Other Comprehensive Income (Loss) [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
BALANCE			$ (1,940)
Increase related to adoption of ASU 2016-09	$ 0		0
Exercise of stock options, vesting of restricted stock units, net of shares exchanged as payment			0
Stock-based compensation			0
Issuance of common stock under Employee Stock Purchase Plan			0
Other comprehensive income, net of tax			434
Net income			0
BALANCE	(1,506)		(1,506)
Retained Earnings [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
BALANCE			18,037
Increase related to adoption of ASU 2016-09	262		262
Exercise of stock options, vesting of restricted stock units, net of shares exchanged as payment			0
Stock-based compensation			0
Issuance of common stock under Employee Stock Purchase Plan			0
Other comprehensive income, net of tax			0
Net income			809
BALANCE	$ 19,108		$ 19,108