Commitments And Contingencies (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Commitments And Contingencies [Line Items]
Rent expense	$ 302,000	$ 302,000	$ 905,000	$ 889,000
Equipment purchases commitments			1,700,000
Minimum [Member]
Commitments And Contingencies [Line Items]
Loss contingency			0
Maximum [Member]
Commitments And Contingencies [Line Items]
Loss contingency			$ 250,000
Hopewell Junction, New York [Member]
Commitments And Contingencies [Line Items]
Area of leased real estate property	37,000		37,000
Lease expiration date			May 31, 2014
Bellevue, Washington [Member]
Commitments And Contingencies [Line Items]
Area of leased real estate property	6,300		6,300
Lease expiration date			Aug. 31, 2014
Santa Clara, California [Member]
Commitments And Contingencies [Line Items]
Area of leased real estate property	2,400		2,400
Lease expiration date			Oct. 31, 2015