Share-Based Compensation (Schedule Of Stock-Based Compensation Expense By Statement Of Operations) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Share-based employee compensation expense	$ 211,000	$ 515,000	$ 717,000	$ 996,000
Cost of contract revenue
Share-based employee compensation expense	27,000	11,000	27,000	15,000
Cost of product revenue
Share-based employee compensation expense	0	0	0	1,000
Research and development expense
Share-based employee compensation expense	36,000	172,000	23,000	260,000
Sales, marketing, general and administrative expense
Share-based employee compensation expense	$ 148,000	$ 332,000	$ 667,000	$ 720,000