Operating Segments and Related Information (Revenue Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Revenue from contracts with United States Government Agencies	$ 1.8	$ 8.6
Percentage of Total Revenue	8.00%	15.00%
Solar Equipment [Member] | Customer A [Member]
Segment Reporting Information [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	12.00%	11.00%
Solar Equipment [Member] | Customer S [Member]
Segment Reporting Information [Line Items]
Entity-Wide Revenue, Major Customer, Percentage		16.00%
Solar Equipment [Member] | Customer G [Member]
Segment Reporting Information [Line Items]
Entity-Wide Revenue, Major Customer, Percentage		1.00%
Biomedical Service [Member] | Customer B [Member]
Segment Reporting Information [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	14.00%
Solar Cell Material [Member] | Customer G [Member]
Segment Reporting Information [Line Items]
Entity-Wide Revenue, Major Customer, Percentage		12.00%
Solar Photovoltaic System [Member] | Customer D [Member]
Segment Reporting Information [Line Items]
Entity-Wide Revenue, Major Customer, Percentage		13.00%