Quarterly report pursuant to Section 13 or 15(d)

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY

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CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($)
shares in Thousands, $ in Thousands
Total
At the market offering
Preferred shares
Common shares
Common shares
At the market offering
ATM proceeds receivable
ATM proceeds receivable
At the market offering
Additional paid-in capital
Additional paid-in capital
At the market offering
Accumulated other comprehensive income (loss)
Accumulated deficit
Balance at beginning of period (in shares) at Dec. 31, 2020     14 56,003              
Balance at beginning of period at Dec. 31, 2020 $ 31,027   $ 0 $ 56   $ 0   $ 242,672   $ (295) $ (211,406)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                      
Net loss (4,172)                   (4,172)
Foreign currency translation adjustment 489                 489 0
Stock based compensation expense 1,199             1,199      
Issuance of common stock resulting from exercise of stock options (in shares)       10              
Issuance of common stock resulting from exercise of stock options 20             20      
Issuance of common stock pursuant to private placement offering (in shares)     0 3,706              
Issuance of common stock pursuant to private placement offering 9,673     $ 4       9,669      
Balance at end of period (in shares) at Mar. 31, 2021     14 59,719              
Balance at end of period at Mar. 31, 2021 38,236   $ 0 $ 60   0   253,560   194 (215,578)
Balance at beginning of period (in shares) at Dec. 31, 2021     16 72,222              
Balance at beginning of period at Dec. 31, 2021 50,755   $ 0 $ 72   0   306,998   829 (257,144)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                      
Net loss (5,101)                   (5,101)
Foreign currency translation adjustment 143                 143  
Unrealized loss on investments (19)                 (19)  
Stock based compensation expense 1,178             1,178      
Issuance of common stock resulting from exercise of stock options (in shares)       43              
Issuance of common stock resulting from exercise of stock options 85             85      
Issuance of common stock pursuant to offering (in shares)         1,833            
Issuance of common stock pursuant to offering value   $ 6,409     $ 2   $ 0   $ 6,407    
Balance at end of period (in shares) at Mar. 31, 2022     16 74,098              
Balance at end of period at Mar. 31, 2022 $ 53,450   $ 0 $ 74   $ 0   $ 314,668   $ 953 $ (262,245)