Commitments and Contingencies (Details)	3 Months Ended
	Mar. 31, 2017
Loss Contingencies [Line Items]
Percentage of royalty obligations, majority are less than	3.00%
Minimum
Loss Contingencies [Line Items]
Percentage of royalty obligations	0.50%
Maximum
Loss Contingencies [Line Items]
Percentage of royalty obligations	5.00%