Common Stock - Private Placement of Common Stock (Details) $ / shares in Units, $ in Thousands			12 Months Ended
	Jan. 03, 2020 USD ($) Vote item $ / shares shares	Feb. 05, 2019 $ / shares shares	Dec. 31, 2020 USD ($) $ / shares	Mar. 05, 2020 $ / shares shares	Dec. 31, 2019 $ / shares	Jan. 31, 2019 $ / shares
Private Placement of Common Stock
Common stock issued | shares		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 | shares	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 | shares				14,413,902
Common Stock, Par or Stated Value Per Share				$ 0.001
Value of beneficial conversion features | $	$ 5,226
Number of special voting stock | Vote	1
Number of members to elect of board of directors | item	1
Series B Preferred | January 2020 Private Placement
Private Placement of Common Stock
Common stock issued | shares	1,137,442
Price per share (in dollars per share)	$ 10.55
Convertible Preferred Stock, Shares Issued upon Conversion | shares				11,531,133
Common Stock, Par or Stated Value Per Share				$ 0.001
Value of beneficial conversion features | $	$ 4,173