Share-Based Compensation (Schedule Of Stock-Based Compensation Expense By Statement Of Operations) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Share-based employee compensation expense	$ 201,000	$ 96,000	$ 506,000	$ 481,000
Cost of contract revenue
Share-based employee compensation expense	0	0	0	4,000
Cost of product revenue
Share-based employee compensation expense	0	0	0	1,000
Research and development expense
Share-based employee compensation expense	(127,000)	(72,000)	(13,000)	88,000
Sales, marketing, general and administrative expense
Share-based employee compensation expense	$ 328,000	$ 168,000	$ 519,000	$ 388,000