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Consolidated Statements of Stockholders' Deficit - USD ($)
$ in Thousands
Total
At-the-market Offering
Senior Convertible Notes Principal
Promissory notes
Mann Group
Senior Convertible Notes
Senior Convertible Notes Interest
Convertible Note Principal
Mann Group
Convertible Note Interest
Mann Group
Common Stock
Common Stock
At-the-market Offering
Common Stock
Senior Convertible Notes Principal
Common Stock
Promissory notes
Mann Group
Common Stock
Senior Convertible Notes
Common Stock
Senior Convertible Notes Interest
Common Stock
Convertible Note Principal
Mann Group
Common Stock
Convertible Note Interest
Mann Group
Additional Paid-in Capital
Additional Paid-in Capital
At-the-market Offering
Additional Paid-in Capital
Senior Convertible Notes Principal
Additional Paid-in Capital
Promissory notes
Mann Group
Additional Paid-in Capital
Senior Convertible Notes
Additional Paid-in Capital
Senior Convertible Notes Interest
Additional Paid-in Capital
Convertible Note Principal
Mann Group
Additional Paid-in Capital
Convertible Note Interest
Mann Group
Accumulated Other Comprehensive Income (Loss)
Accumulated Deficit
Beginning Balance at Dec. 31, 2018 $ (175,082)               $ 1,870               $ 2,763,067               $ (19) $ (2,940,000)
Beginning Balance (in shares) at Dec. 31, 2018                 187,030,000                                  
Exercise of stock options 124               $ 1               123                  
Exercise of stock options (in shares)                 68,000                                  
Issuance of common stock under Employee Stock Purchase Plan 656               $ 7               649                  
Issuance of common stock under Employee Stock Purchase Plan (in shares)                 653,000                                  
Stock-based compensation expense 6,203                               6,203                  
Issuance of common stock pursuant to conversion notes 4,575     $ 8,000 $ 5,575       $ 42     $ 71 $ 49       4,533     $ 7,929 $ 5,526          
Issuance of common stock pursuant to conversion notes (in shares)                 4,193,000     7,143,000 4,911,000                          
Issuance of common stock from the release of restricted stock units (2)               $ 7               (9)                  
Issuance of common stock from the release of restricted stock units (in shares)                 705,000                                  
Issuance of common stock in at-the-market offering   $ 3,199               $ 26               $ 3,173                
Issuance of common stock in at-the-market offering (in shares)                   2,585,000                                
Issuance cost associated with at-the-market offering (60)                               (60)                  
Issuance of warrants pursuant to MidCap Credit Facility 1,854                               1,854                  
Issuance of common stock from the exercise of warrants 5,900               $ 45               5,855                  
Issuance of common stock from the exercise of warrants (in Share)                 4,500,000                                  
Warrant modification 688                               688                  
Repurchase of warrants (253)                               (253)                  
Net loss (51,903)                                                 (51,903)
Ending Balance at Dec. 31, 2019 (190,526)               $ 2,118               2,799,278               (19) (2,991,903)
Ending Balance (in shares) at Dec. 31, 2019                 211,788,000                                  
Net issuance of common stock in association with stock options and restricted stock units $ 233               $ 6               227                  
Net issuance of common stock associated with stock options and restricted stock units (in shares)                 653,000                                  
Exercise of stock options (in shares) 432,166                                                  
Issuance of common stock under Employee Stock Purchase Plan $ 684               $ 6               678                  
Issuance of common stock under Employee Stock Purchase Plan (in shares)                 627,000                                  
Stock-based compensation expense 6,511                               6,511                  
Issuance of common stock pursuant to conversion notes     $ 5,261     $ 288 $ 7,000 $ 3,000     $ 26     $ 2 $ 28 $ 12     $ 5,235     $ 286 $ 6,972 $ 2,988    
Issuance of common stock pursuant to conversion notes (in shares)                     2,612,000     188,000 2,800,000 1,200,000                    
Issuance of common stock in at-the-market offering   $ 23,530               $ 118               $ 23,412                
Issuance of common stock in at-the-market offering (in shares)                   11,853,000                                
Issuance cost associated with at-the-market offering (519)                               (519)                  
Issuance of common stock from acquisition 9,250               $ 31               9,219                  
Issuance of common stock from acquisition (in shares)                 3,067,000                                  
Issuance of warrants pursuant to MidCap Credit Facility 275                               275                  
Issuance of common stock from the exercise of warrants 11,600               $ 73               11,527                  
Issuance of common stock from the exercise of warrants (in Share)                 7,250,000                                  
Issuance of common stock from market price stock purchase 215               $ 1               214                  
Issuance of common stock under Market Price Stock Purchase Plan (in shares)                 80,000                                  
Cumulative translation loss 19                                               $ 19  
Net loss (57,240)                                                 (57,240)
Ending Balance at Dec. 31, 2020 $ (180,419)               $ 2,421               $ 2,866,303                 $ (3,049,143)
Ending Balance (in shares) at Dec. 31, 2020                 242,118,000