Common Stock - Private Placement of Common Stock (Details) - USD ($) $ / shares in Units, $ in Thousands			9 Months Ended
	Jan. 03, 2020	Feb. 05, 2019	Sep. 30, 2020	Mar. 05, 2020	Dec. 31, 2019	Jan. 31, 2019
Private Placement of Common Stock
Common stock issued		7,557,142
Price per share (in dollars per share)		$ 1.75
Common Stock, Par or Stated Value Per Share			$ 0.001		$ 0.001
January 2020 Private Placement
Private Placement of Common Stock
Exercise price of warrant			$ 1.055	$ 2.11		$ 1.75
Fixed cumulative percentage per annum			8.00%
Cumulative Dividends			$ 372
Series A Preferred | January 2020 Private Placement
Private Placement of Common Stock
Common stock issued	1,421,801
Price per share (in dollars per share)	$ 10.54
Net proceeds from issuance of stock in private placement	$ 25,322
Convertible Preferred Stock, Shares Issued upon Conversion				14,413,902
Common Stock, Par or Stated Value Per Share				$ 0.001
Value of beneficial conversion features	$ 5,226
Series B Preferred | January 2020 Private Placement
Private Placement of Common Stock
Common stock issued	1,137,442
Price per share (in dollars per share)	$ 10.55
Convertible Preferred Stock, Shares Issued upon Conversion				11,531,133
Common Stock, Par or Stated Value Per Share				$ 0.001
Value of beneficial conversion features	$ 4,173