Common Stock And Stock Options (Tables)

12 Months Ended

Dec. 31, 2017

Common Stock And Stock Options [Abstract]

Summary Of Stock Option Activity

			Weighted-average		Aggregate
	Number of Shares		Exercise Price		Intrinsic Value
Outstanding at December 31, 2014	1,313	$	5.86
Options granted	170		7.14
Options exercised	(159)		3.12
Outstanding at December 31, 2015	1,324		6.36
Options forfeited or cancelled	(70)		5.75
Options granted	192		7.11
Options exercised	(61)		5.22
Outstanding at December 31, 2016	1,385		6.54
Options forfeited or cancelled	(15)		12.42
Options granted	303		7.28
Options exercised	(220)		10.67
Outstanding at December 31, 2017	1,453	$	5.95	$	19,000
Exercisable at December 31, 2016	1,025	$	6.45	$	1,615
Exercisable at December 31, 2017	970	$	5.42	$	13,958
Available for future grant at December 31, 2017	251

Schedule Of Weighted Average Assumptions

	2017		2016		2015
Dividend yield	0.0	%	0.0	%	0.0	%
Expected volatility	59.29 - 63.51	%	61.66 - 66.45	%	65.15 - 72.81	%
Risk-free interest rate	1.87-2.16	%	1.36-2.00	%	1.42-1.88	%
Expected life (years)	6.0		6.0		6.0