Preferred Stock and Common Stock Warrants - Preferred Stock (Details) $ / shares in Units, $ in Thousands		1 Months Ended		3 Months Ended
	Apr. 15, 2019 USD ($)	Sep. 30, 2018 USD ($) $ / shares shares	Aug. 31, 2018 USD ($) $ / shares shares	Mar. 31, 2019 USD ($) $ / shares
Convertible Preferred Stock
Stockholders’ Equity
Temporary equity, issued value per share				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			$ 1,600
Series B Convertible Preferred stock
Stockholders’ Equity
Number of shares issued | shares		29,055
Convertible preferred stock, par value		$ 0.0001
Temporary equity, issued value per share		1,000
Aggregate purchase price | $		$ 29,055
Additional shares issued as origination fees | shares		581
Paid-in-kind dividends | $	$ 900			$ 900