Summary of Significant Accounting Policies (Schedule Of Stock-Based Compensation Expense By Statement Of Operations) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Stock-based employee compensation expense	$ 1,606,000	$ 2,269,000
Cost of contract revenue
Stock-based employee compensation expense	19,000	34,000
Cost of product revenue
Stock-based employee compensation expense	1,000	54,000
Research and development expense
Stock-based employee compensation expense	466,000	825,000
Sales, marketing, general and administrative expense
Stock-based employee compensation expense	$ 1,120,000	$ 1,356,000