Operating Segments and Related Information Narrative Revenue (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Segment Reporting Information [Line Items]
Revenue from contracts with United States Government Agencies	$ 446	$ 424
Percentage of Total Revenue	14.00%	6.00%
Solar Equipment [Member]
Segment Reporting Information [Line Items]
The Number of Major Customers That Account for 10% or Greater of the Company's Revenue		3
Solar Equipment [Member] | Customer J [Member]
Segment Reporting Information [Line Items]
Entity-Wide Revenue, Major Customer, Percentage		19.00%
Solar Equipment [Member] | Customer K [Member]
Segment Reporting Information [Line Items]
Entity-Wide Revenue, Major Customer, Percentage		13.00%
Solar Equipment [Member] | Customer R [Member]
Segment Reporting Information [Line Items]
Entity-Wide Revenue, Major Customer, Percentage		23.00%
Biomedical Service [Member]
Segment Reporting Information [Line Items]
The Number of Major Customers That Account for 10% or Greater of the Company's Revenue	2
Biomedical Service [Member] | Customer A [Member]
Segment Reporting Information [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	16.00%
Biomedical Service [Member] | Customer C [Member]
Segment Reporting Information [Line Items]
Entity-Wide Revenue, Major Customer, Percentage	23.00%