Business Description And Significant Accounting Policies (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Business Description And Significant Accounting Policies [Line Items]
Cash held in foreign accounts	$ 3,585,000	$ 2,296,000
Demonstration inventory useful life	36 months
Recognized foreign currency transactions gains	$ 11,000	$ 34,000
Maximum [Member]
Business Description And Significant Accounting Policies [Line Items]
Estimated useful lives of the equipment	10 years
Minimum [Member]
Business Description And Significant Accounting Policies [Line Items]
Estimated useful lives of the equipment	3 years
Developed Technology [Member] | Maximum [Member]
Business Description And Significant Accounting Policies [Line Items]
Amortization period, based on estimated life	10 years
Developed Technology [Member] | Minimum [Member]
Business Description And Significant Accounting Policies [Line Items]
Amortization period, based on estimated life	6 years
Patents [Member]
Business Description And Significant Accounting Policies [Line Items]
Amortization period, based on estimated life	3 years