Computation of Net Loss Per Share of Common Stock (Components Of Net Income (Loss) Per Basic And Diluted Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net loss per share – basic
Net loss	$ (1,531)	$ (2,611)	$ (6,061)	$ (6,173)
Weighted average number of shares outstanding, basic (in shares)	9,484	9,356	9,427	9,301
Earnings per share, basic (in dollars per share)	$ (0.16)	$ (0.28)	$ (0.64)	$ (0.66)
Net loss per share – diluted
Warrant fair value adjustment net of tax	$ 0	$ (11)	$ 0	$ 0
Net income (loss) available to common stockholders, diluted	$ (1,531)	$ (2,622)	$ (6,061)	$ (6,173)
Incremental common shares attributable to dilutive effect of call options and warrants (in shares)	0	1	0	0
Weighted average number of shares outstanding, diluted (in shares)	9,484	9,357	9,427	9,301
Earnings per share, diluted (in dollars per share)	$ (0.16)	$ (0.28)	$ (0.64)	$ (0.66)
Warrants
Net loss per share – diluted
Incremental common shares attributable to dilutive effect of call options and warrants (in shares)	0	1	0	0