Debt - Notes Payable (Details) - USD ($)	May 28, 2018	Sep. 30, 2019	Jun. 30, 2019	Jun. 26, 2019	Dec. 31, 2018	Feb. 28, 2015
Notes payable
Convertible debt, Gross					$ 11,294,770
Notes payable, net of discount					4,845,575
Notes payable - current, net		$ 6,678,461
Notes payable						$ 150,000
Notes payable
Notes payable
Convertible debt, Gross		6,678,461			5,180,857
Less: unamortized debt discount and net issuance costs					(335,282)
Note payable, net		6,678,461			4,845,575
Notes payable, net of discount		6,678,461
Notes payable - current, net					4,845,575
December 2017 note payable | Notes payable
Notes payable
Convertible debt, Gross					1,673,237
February 2018 note payable | Notes payable
Notes payable
Convertible debt, Gross					2,359,750
March 2018 note payable | Notes payable
Notes payable
Convertible debt, Gross					$ 1,147,870
2019 Exchange Note 1
Notes payable
Accrued interest on notes payable	$ 410,562
Notes payable	$ 10,125,339
Interest rate (as a percent)	10.00%
2019 Exchange Note 1 | Notes payable
Notes payable
Convertible debt, Gross		4,381,535
2019 Exchange Note 2
Notes payable
Notes payable	$ 2,296,926
Interest rate (as a percent)	10.00%
2019 Exchange Note 2 | Notes payable
Notes payable
Convertible debt, Gross		$ 2,296,926
2019 Bridge Notes
Notes payable
Notes payable			$ 5,050,000
Interest rate (as a percent)				12.00%