Significant Customers, Geographic Areas, And Business Segments (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Revenue, Major Customer [Line Items]
Accounts receivable	$ 6,129,000	$ 11,909,000
Revenue, export sales percentage	85.00%	85.00%
Significant Customer A [Member]
Revenue, Major Customer [Line Items]
Accounts receivable	312,000	1,393,000
Major customers, total revenue percentage	13.00%	16.00%
Significant Customer B [Member]
Revenue, Major Customer [Line Items]
Accounts receivable	414,000
Major customers, total revenue percentage	12.00%
Significant Customer C [Member]
Revenue, Major Customer [Line Items]
Accounts receivable		$ 1,120,000
Major customers, total revenue percentage		14.00%
LaserAlign Customer [Member]
Revenue, Major Customer [Line Items]
Major customers, total revenue percentage	18.00%	20.00%