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Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($)
$ in Thousands
Total
Common stock
Additional paid-in capital
Treasury stock
Retained deficit
Accumulated other comprehensive income / (loss)
Balance at beginning of period at Dec. 31, 2022 $ 307,035 $ 62 $ 1,253,613 $ (138,560) $ (680,595) $ (127,485)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Stock-based compensation expense 841   841      
Restricted stock issuance, net of forfeitures (1,873) 1 (1,874)      
Conversion of debt to common stock 113,650 46 113,604      
Stock issuance related to business acquisition 0          
Treasury stock (3,497)     (3,497)    
Currency translation adjustment 4,158         4,158
Change in pension liability 15         15
Net loss (3,486)       (3,486)  
Balance at end of period at Mar. 31, 2023 416,843 109 1,366,184 (142,057) (684,081) (123,312)
Balance at beginning of period at Dec. 31, 2023 412,633 109 1,369,288 (142,057) (699,471) (115,236)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Stock-based compensation expense 1,573   1,573      
Restricted stock issuance, net of forfeitures (1,090) 1 (1,091)      
Stock issuance related to business acquisition 44,220 20 44,200      
Currency translation adjustment (804)         (804)
Change in pension liability (15)         (15)
Net loss (10,315)       (10,315)  
Balance at end of period at Mar. 31, 2024 $ 446,202 $ 130 $ 1,413,970 $ (142,057) $ (709,786) $ (116,055)