Preferred Stock and Common Stock Warrants - Preferred Stock (Details) $ in Thousands		1 Months Ended			3 Months Ended	6 Months Ended	9 Months Ended
	Jul. 15, 2019 USD ($)	May 31, 2019 $ / shares shares	Sep. 30, 2018 shares	Aug. 31, 2018 USD ($) $ / shares shares	Jun. 30, 2019 USD ($) $ / shares	Jun. 30, 2019 $ / shares	May 31, 2019 USD ($) $ / shares shares
Convertible Preferred Stock
Stockholders’ Equity
Temporary equity, issued value per share					1,000	1,000
Dividends, temporary equity percentage						12.00%
Series A convertible preferred stock
Stockholders’ Equity
Number of shares issued | shares				50,000
Convertible preferred stock, par value				$ 0.0001
Temporary equity, issued value per share				1,000
Aggregate purchase price | $				$ 50,000
Additional shares issued as origination fees | shares				1,000
Paid-in-kind dividends | $	$ 1,600				$ 3,100
Series B convertible preferred stock
Stockholders’ Equity
Number of shares issued | shares		20,945	29,055
Convertible preferred stock, par value		$ 0.0001					$ 0.0001
Temporary equity, issued value per share		1,000					1,000
Aggregate purchase price | $							$ 50,000
Additional shares issued as origination fees | shares							999
Paid-in-kind dividends | $	$ 1,200				$ 1,800