Long-term Debt and Intangible Assets - Notes Payable (Details)	1 Months Ended	12 Months Ended		13 Months Ended
	Nov. 30, 2013 USD ($) item	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014 USD ($)
Other disclosures
Useful life/amortization period		60 months	60 months
Buy-out Agreement with GMP
Other disclosures
Maximum payment allowed under the agreement in the event of a sale of the Company meeting certain criteria	$ 2,000,000
Buy-out Agreement with GMP | GMP royalty buyout
Other disclosures
Intangible asset purchase amount	$ 17,500,000
Useful life/amortization period	5 years
Notes Payable | GMP Note Parties | November 30, 2013 to December 31, 2014
Other disclosures
Monthly interest only payments				$ 72,900
Notes Payable | GMP Note Parties | January 31, 2015 to December 31, 2016
Other disclosures
Number of periodic payments of principal and interest | item	24
Monthly principal and interest payments	$ 767,700
Notes Payable | GMP Note Parties | Buy-out Agreement with GMP
Other disclosures
Face amount at time of issuance	$ 17,500,000
Interest rate (as a percent)	5.00%