Annual report pursuant to Section 13 and 15(d)

Description of the Business and Financial Condition (Details Narrative)

v3.21.1
Description of the Business and Financial Condition (Details Narrative) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 12 Months Ended
Feb. 23, 2021
Dec. 31, 2020
Dec. 31, 2019
Cumulative net loss   $ (119,522) $ (112,740)
Net cash used in operations   (7,807) (2,850)
Offering costs     $ 94,162
Proceeds from issuance of Paycheck Protection Program loan   896  
Subsequent Event | Public Offering      
Sale of stock, number of shares issued [1] 2,127,660    
Proceeds from issuance of stock $ 46,800    
Securities Purchase Agreement (the "2019 PIPE") | Accredited Investors      
Sale of stock, number of shares issued     2,426,455
Share price (in dollars per share)     $ 3.10
Offering costs     $ 94,162
Proceeds from issuance of stock     $ 7,500
Security Purchase Agreement | The "2020 Secured Notes"      
Secured convertible notes   17,500  
Proceeds from debt, net   $ 16,800  
Term of secured notes   5 years  
Increase in secured convertible notes   $ 7,500  
[1] Composed of 1,850,140 shares of common stock initially offered at a public offering price of $23.50 per share and an additional 277,520 shares of common stock sold pursuant to the exercise of the underwriters' option to purchase additional shares at the price of $22.09 per share.