Segment Information and Concentration of Business Risk, Revenue from Significant Partners (Details) - Partner	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Revenue [Member] | Customer Concentration [Member] | Partner A [Member]
Significant Partners [Abstract]
Concentration percentage	76.00%	25.00%	46.00%	41.00%
Revenue [Member] | Customer Concentration [Member] | Partner B [Member]
Significant Partners [Abstract]
Concentration percentage	14.00%	0.00%	11.00%	0.00%
Revenue [Member] | Customer Concentration [Member] | Partner C [Member]
Significant Partners [Abstract]
Concentration percentage	1.00%	10.00%	31.00%	7.00%
Revenue [Member] | Customer Concentration [Member] | Partner D [Member]
Significant Partners [Abstract]
Concentration percentage	0.00%	39.00%	0.00%	20.00%
Contracts Receivables [Member] | Credit Concentration [Member] | Significant Partners [Member]
Significant Partners [Abstract]
Concentration percentage			99.00%		92.00%
Number of significant partners			1		2