Stockholders' Equity And Share-Based Compensation (Summary Of Stock Option Activity) (Details) - Stock Options [Member] - $ / shares shares in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Balances — December 31, 2015, Number of shares	875
Options granted, Number of shares	171
Options exercised, Number of shares
Options canceled, Number of shares	(6)
Options expired, Number of shares	(19)
Balances — June 30, 2016, Number of shares	1,021	875
Exercisable, Number of shares	142
Balances — December 31, 2015, Weighted average exercise price per share	$ 3.51
Options granted, Weighted average exercise price per share	4.12
Options exercised, Weighted average exercise price per share
Options canceled, Weighted average exercise price per share	4.00
Options expired, Weighted average exercise price per share	2.67
Balances — June 30, 2016, Weighted average exercise price per share	$ 3.63	$ 3.51
Weighted average remaining life	7 years 9 months 4 days	7 years 9 months 7 days