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Unaudited Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-In Capital
Retained Earnings
Accumulated Other Comprehensive Loss
Treasury Stock
Beginning balance at Dec. 31, 2021 $ 695,826 $ 739 $ 1,105,135 $ 281,567 $ (66,031) $ (625,584)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income (loss) (12,425)     (12,425)    
Currency translation adjustments (excluding intercompany advances) (23,571)       (23,571)  
Currency translation adjustments on intercompany advances (187)       (187)  
Issuance of common stock in connection with settlement of disputes with seller of GEODynamics, Inc. 10,332 19 10,313      
Stock-based compensation expense 5,167 8 5,159      
Surrender of stock to settle taxes on stock awards (1,002)         (1,002)
Ending balance at Sep. 30, 2022 674,140 766 1,120,607 269,142 (89,789) (626,586)
Beginning balance at Jun. 30, 2022 671,941 747 1,108,631 266,999 (77,850) (626,586)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income (loss) 2,143     2,143    
Currency translation adjustments (excluding intercompany advances) (10,363)       (10,363)  
Currency translation adjustments on intercompany advances (1,576)       (1,576)  
Issuance of common stock in connection with settlement of disputes with seller of GEODynamics, Inc. 10,332 19 10,313      
Stock-based compensation expense 1,663 0 1,663      
Surrender of stock to settle taxes on stock awards 0         0
Ending balance at Sep. 30, 2022 674,140 766 1,120,607 269,142 (89,789) (626,586)
Beginning balance at Dec. 31, 2022 689,558 766 1,122,292 272,027 (78,941) (626,586)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income (loss) 6,928     6,928    
Currency translation adjustments (excluding intercompany advances) 1,774       1,774  
Currency translation adjustments on intercompany advances (104)       (104)  
Stock-based compensation expense 5,157 6 5,151      
Stock repurchases (3,001)         (3,001)
Surrender of stock to settle taxes on stock awards (1,948)         (1,948)
Ending balance at Sep. 30, 2023 698,364 772 1,127,443 278,955 (77,271) (631,535)
Beginning balance at Jun. 30, 2023 698,105 772 1,125,647 274,743 (71,522) (631,535)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income (loss) 4,212     4,212    
Currency translation adjustments (excluding intercompany advances) (4,429)       (4,429)  
Currency translation adjustments on intercompany advances (1,320)       (1,320)  
Stock-based compensation expense 1,796 0 1,796      
Stock repurchases 0         0
Surrender of stock to settle taxes on stock awards 0         0
Ending balance at Sep. 30, 2023 $ 698,364 $ 772 $ 1,127,443 $ 278,955 $ (77,271) $ (631,535)