Concentrations of Risk (Details) (USD $)			6 Months Ended											12 Months Ended	6 Months Ended	12 Months Ended	6 Months Ended	12 Months Ended	6 Months Ended	12 Months Ended	6 Months Ended
	Jun. 30, 2012 Cash and cash equivalents Credit concentration	Jun. 30, 2012 Cash and cash equivalents Credit concentration Maximum	Jun. 30, 2012 Revenue Customer concentration item	Jun. 30, 2011 Revenue Customer concentration item	Jun. 30, 2012 Revenue Customer concentration Customer one	Jun. 30, 2011 Revenue Customer concentration Customer one	Jun. 30, 2012 Revenue Customer concentration Customer two	Jun. 30, 2011 Revenue Customer concentration Customer two	Jun. 30, 2012 Revenue Customer concentration Customer three	Jun. 30, 2012 Revenue Customer concentration Customer four	Jun. 30, 2012 Revenue Segment concentration Health Sciences business	Jun. 30, 2011 Revenue Segment concentration Health Sciences business	Jun. 30, 2012 Trade accounts receivable Credit concentration item	Dec. 31, 2011 Trade accounts receivable Credit concentration item	Jun. 30, 2012 Trade accounts receivable Credit concentration Major contract one	Dec. 31, 2011 Trade accounts receivable Credit concentration Major contract one	Jun. 30, 2012 Trade accounts receivable Credit concentration Major contract two	Dec. 31, 2011 Trade accounts receivable Credit concentration Major contract two	Jun. 30, 2012 Trade accounts receivable Credit concentration Major contract three	Dec. 31, 2011 Trade accounts receivable Credit concentration Major contract three	Jun. 30, 2012 Trade accounts receivable Credit concentration Major contract four
Concentrations of Risk
Deposits insured by the Federal Deposit Corporation		$ 250,000
Uninsured bank deposit balance	$ 3,900,000
Percentage of concentration risk under a specified benchmark					34.00%	44.00%	24.00%	23.00%	11.00%	10.00%	100.00%	100.00%	67.00%	62.00%	24.00%	35.00%	18.00%	14.00%	13.00%	13.00%	12.00%
Number of customers			4	2
Number of major contracts													4	3