Fair Value Measurements - Schedule of Fair Value of Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Profits interest sold	$ 212
Quoted Prices in Active Markets (Level 1) [Member]
Total Derivative Liability
Profits interest sold
Warrant Liability
Total Fair Value
Quoted Prices in Active Markets (Level 1) [Member] | Convertible Notes [Member]
Total Derivative Liability
Quoted Prices in Active Markets (Level 1) [Member] | Related Party Convertible Notes [Member]
Total Derivative Liability
Significant Other Observable Inputs (Level 2) [Member]
Total Derivative Liability
Profits interest sold
Warrant Liability
Total Fair Value
Significant Other Observable Inputs (Level 2) [Member] | Convertible Notes [Member]
Total Derivative Liability
Significant Other Observable Inputs (Level 2) [Member] | Related Party Convertible Notes [Member]
Total Derivative Liability
Significant Unobservable Inputs (Level 3) [Member]
Total Derivative Liability	890	1,018
Profits interest sold	212
Warrant Liability	2,051	4,528
Total Fair Value	3,153	5,546
Significant Unobservable Inputs (Level 3) [Member] | Convertible Notes [Member]
Total Derivative Liability	321	469
Significant Unobservable Inputs (Level 3) [Member] | Related Party Convertible Notes [Member]
Total Derivative Liability	$ 569	$ 549