Segment Information and Concentration of Business Risk, Revenue from Significant Partners (Details) - Partner	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenue [Member] | Significant Partner [Member] | Partner A [Member]
Significant Partners [Abstract]
Concentration percentage	60.00%	37.00%	58.00%
Revenue [Member] | Significant Partner [Member] | Partner B [Member]
Significant Partners [Abstract]
Concentration percentage	19.00%	2.00%	13.00%
Revenue [Member] | Significant Partner [Member] | Partner C [Member]
Significant Partners [Abstract]
Concentration percentage	4.00%	12.00%	17.00%
Revenue [Member] | Significant Partner [Member] | Partner D [Member]
Significant Partners [Abstract]
Concentration percentage	2.00%	33.00%	0.00%
Revenue [Member] | Significant Partner [Member] | Partner E [Member]
Significant Partners [Abstract]
Concentration percentage	2.00%	11.00%	4.00%
Contracts Receivables [Member] | Significant Partners [Member]
Significant Partners [Abstract]
Number of significant partners	2	2
Contracts Receivables [Member] | Significant Partner [Member] | Significant Partners [Member]
Significant Partners [Abstract]
Concentration percentage	92.00%	99.00%