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CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Common Stock
Additional Paid-in Capital
Accumulated Deficit
Series E preferred shares
Series F preferred shares
Series G preferred shares
Total
Balance as of beginning of period at Dec. 31, 2022 $ 2 $ 606,182 $ (587,210)       $ 18,974
Balance as of beginning of period (in shares) at Dec. 31, 2022 1,706,971     53,144      
Stockholders' Equity              
At the market offering, net of offering costs   14,893         14,893
At the market offering, net of offering costs (in shares) 475,265            
Issuance of common stock for vested restricted stock units (in shares) 2,202            
Issuance of common stock to satisfy deferred purchase consideration   365         365
Issuance of common stock to satisfy deferred purchase consideration (in shares) 19,350            
Issuance of common stock to satisfy contingent consideration   2,354         2,354
Issuance of common stock to satisfy contingent consideration (in shares) 105,038            
Issuance of common stock under employee stock purchase plan   6         6
Issuance of common stock under employee stock purchase plan (in shares) 461            
Stock-based compensation expense   1,324         1,324
Net loss     (14,455)       (14,455)
Balance as of end of period at Mar. 31, 2023 $ 2 625,124 (601,665)       23,461
Balance as of end of period (in shares) at Mar. 31, 2023 2,309,287     53,144      
Balance as of beginning of period at Dec. 31, 2023 $ 3 636,910 (629,409)       7,504
Balance as of beginning of period (in shares) at Dec. 31, 2023 2,759,372     51,246 2,928    
Stockholders' Equity              
Issuance of common stock for vested restricted stock units (in shares) 49,503            
Issuance of common stock under employee stock purchase plan   21         21
Issuance of common stock under employee stock purchase plan (in shares) 3,579            
Issuance of common stock to satisfy service contract   29         29
Issuance of common stock to satisfy service contract (in shares) 4,000            
Issuance of common stock upon conversion of Preferred Stock   8,538         8,538
Issuance of common stock upon conversion of Preferred Stock (in shares)           10,901  
Stock-based compensation expense   2,376         2,376
Net loss     (11,807)       (11,807)
Balance as of end of period at Mar. 31, 2024 $ 3 $ 647,874 $ (641,216)       $ 6,661
Balance as of end of period (in shares) at Mar. 31, 2024 2,816,454     51,246 2,928 10,901