Concentration of Business Risk (Details)	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended			12 Months Ended
	Jun. 30, 2014 Revenue [Member] Partner A [Member]	Jun. 30, 2013 Revenue [Member] Partner A [Member]	Jun. 30, 2014 Revenue [Member] Partner A [Member]	Jun. 30, 2013 Revenue [Member] Partner A [Member]	Jun. 30, 2014 Revenue [Member] Partner B [Member]	Jun. 30, 2013 Revenue [Member] Partner B [Member]	Jun. 30, 2014 Revenue [Member] Partner B [Member]	Jun. 30, 2013 Revenue [Member] Partner B [Member]	Jun. 30, 2014 Revenue [Member] Partner C [Member]	Jun. 30, 2013 Revenue [Member] Partner C [Member]	Jun. 30, 2014 Revenue [Member] Partner C [Member]	Jun. 30, 2013 Revenue [Member] Partner C [Member]	Jun. 30, 2014 Revenue [Member] Partner D [Member]	Jun. 30, 2013 Revenue [Member] Partner D [Member]	Jun. 30, 2014 Revenue [Member] Partner D [Member]	Jun. 30, 2013 Revenue [Member] Partner D [Member]	Jun. 30, 2014 Contract Receivables [Member] Significant Partners [Member] Partner	Dec. 31, 2013 Contract Receivables [Member] Significant Partners [Member] Partner
Concentration Risk [Line Items]
Concentration percentage (in hundredths)	60.00%	19.00%	52.00%	14.00%	27.00%	40.00%	22.00%	22.00%	0.00%	20.00%	0.00%	40.00%	6.00%	6.00%	8.00%	15.00%	97.00%	91.00%
Number of significant partners																	3	3