Operating Segments and Related Information Narrative Revenue (Details)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Segment Reporting Information [Line Items]
Concentration risk, government contracts	1	446
Government contracts concentration risk
Segment Reporting Information [Line Items]
Concentration risk, percentage	0.02%	14.00%
Biomedical Service
Segment Reporting Information [Line Items]
The number of major customers that account for 10% or greater of the company's revenue	2	2
Biomedical Service | Customer A
Segment Reporting Information [Line Items]
Concentration risk, percentage	18.00%	16.00%
Biomedical Service | Customer C
Segment Reporting Information [Line Items]
Concentration risk, percentage	18.00%	23.00%
Solar | Customer D
Segment Reporting Information [Line Items]
Concentration risk, percentage	26.00%
The number of major customers that account for 10% or greater of the company's revenue	1
Solar | Customer K
Segment Reporting Information [Line Items]
Concentration risk, percentage	12.00%
The number of major customers that account for 10% or greater of the company's revenue	1