Concentration of Business Risk (Details)	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended			12 Months Ended
	Sep. 30, 2014 Revenue [Member] Partner A [Member]	Sep. 30, 2013 Revenue [Member] Partner A [Member]	Sep. 30, 2014 Revenue [Member] Partner A [Member]	Sep. 30, 2013 Revenue [Member] Partner A [Member]	Sep. 30, 2014 Revenue [Member] Partner B [Member]	Sep. 30, 2013 Revenue [Member] Partner B [Member]	Sep. 30, 2014 Revenue [Member] Partner B [Member]	Sep. 30, 2013 Revenue [Member] Partner B [Member]	Sep. 30, 2014 Revenue [Member] Partner C [Member]	Sep. 30, 2013 Revenue [Member] Partner C [Member]	Sep. 30, 2014 Revenue [Member] Partner C [Member]	Sep. 30, 2013 Revenue [Member] Partner C [Member]	Sep. 30, 2014 Revenue [Member] Partner D [Member]	Sep. 30, 2013 Revenue [Member] Partner D [Member]	Sep. 30, 2014 Revenue [Member] Partner D [Member]	Sep. 30, 2013 Revenue [Member] Partner D [Member]	Sep. 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)	72.00%	25.00%	59.00%	16.00%	12.00%	48.00%	9.00%	22.00%	1.00%	18.00%	15.00%	21.00%	0.00%	0.00%	0.00%	31.00%	94.00%	91.00%
Number of significant partners																	2	3