Warrants - Issued and Outstanding (Details) - Common Stock - USD ($) $ / shares in Units, $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Warrants Issued 3/1/2017
Class of Warrant or Right [Line Items]
Number of Shares Underlying Warrants (in shares)	1,388	1,388
Price per Share (in dollars per share)	$ 5.94	$ 5.94
Fair Value	$ 5	$ 5
Warrants Issued 7/22/2013
Class of Warrant or Right [Line Items]
Number of Shares Underlying Warrants (in shares)	32,983	32,983
Price per Share (in dollars per share)	$ 9.10	$ 9.10
Fair Value	$ 122	$ 122
Warrants Issued 11/26/2014
Class of Warrant or Right [Line Items]
Number of Shares Underlying Warrants (in shares)	6,680	6,680
Price per Share (in dollars per share)	$ 16.47	$ 16.47
Fair Value	$ 49	$ 49
Warrants Issued 10/20/2015
Class of Warrant or Right [Line Items]
Number of Shares Underlying Warrants (in shares)	41,650	41,650
Price per Share (in dollars per share)	$ 16.47	$ 16.47
Fair Value	$ 396	$ 396
Warrants Issued 11/9/2015
Class of Warrant or Right [Line Items]
Number of Shares Underlying Warrants (in shares)	25,709	25,709
Price per Share (in dollars per share)	$ 16.47	$ 16.47
Fair Value	$ 244	$ 244
Warrants Issued 12/22/2016
Class of Warrant or Right [Line Items]
Number of Shares Underlying Warrants (in shares)	9,712	9,712
Price per Share (in dollars per share)	$ 10.03	$ 10.03
Fair Value	$ 45	$ 45
Common Stock Warrants
Class of Warrant or Right [Line Items]
Number of Shares Underlying Warrants (in shares)	118,122	118,122
Fair Value	$ 861	$ 861