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Condensed Consolidating Financial Information - Condensed Consolidating Statement of Cash Flows (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Cash flows from operating activities:      
Net cash provided by (used in) operating activities $ 7,098 $ 27,612 $ 993
Cash flows from investing activities:      
Investment in multi-client data library (28,276) (23,710) (14,884)
Purchase of property, plant, equipment and seismic rental equipment (1,514) (1,063) (1,458)
Proceeds from sale of cost method investments 0 0 2,698
Net cash used in investing activities (29,790) (24,773) (13,644)
Cash flows from financing activities:      
Repayments under revolving line of credit (10,000) 0 (5,000)
Borrowings under revolving line of credit 0 0 15,000
Payments on notes payable and long-term debt (30,807) (4,816) (23,634)
Cost associated with issuance of debt (1,247) (53) (6,744)
Repurchase of common stock 0 0 (964)
Intercompany lending 0 0 0
Proceeds from employee stock purchases and exercise of stock options 214 1,619 0
Payments to repurchase bonds   0  
Net proceeds from issuance of stocks 46,999 0 0
Dividend payment to noncontrolling interest (200) (100) 0
Other financing activities (1,151) (243) (252)
Net cash provided by (used in) financing activities 3,808 (3,593) (21,594)
Effect of change in foreign currency exchange rates on cash, cash equivalents and restricted cash 319 (260) 1,386
Net decrease in cash, cash equivalents and restricted cash (18,565) (1,014) (32,859)
Cash, cash equivalents and restricted cash at beginning of period 52,419 53,433 86,292
Cash, cash equivalents and restricted cash at end of period 33,854 52,419 53,433
Reportable Legal Entities | ION Geophysical Corporation      
Cash flows from operating activities:      
Net cash provided by (used in) operating activities (37,659) (22,315) (30,732)
Cash flows from investing activities:      
Investment in multi-client data library 0 0 0
Purchase of property, plant, equipment and seismic rental equipment (392) (165) (73)
Proceeds from sale of cost method investments     2,698
Net cash used in investing activities (392) (165) 2,625
Cash flows from financing activities:      
Repayments under revolving line of credit (10,000)   (5,000)
Borrowings under revolving line of credit     15,000
Payments on notes payable and long-term debt (30,169) (1,591) (17,070)
Cost associated with issuance of debt (1,247) (53) (6,744)
Repurchase of common stock     (964)
Intercompany lending 7,983 38,732 31,867
Proceeds from employee stock purchases and exercise of stock options 214 1,619  
Payments to repurchase bonds   0  
Net proceeds from issuance of stocks 46,999    
Dividend payment to noncontrolling interest (200) (100)  
Other financing activities (1,151) (243) (252)
Net cash provided by (used in) financing activities 12,429 38,364 16,837
Effect of change in foreign currency exchange rates on cash, cash equivalents and restricted cash 0 0 0
Net decrease in cash, cash equivalents and restricted cash (25,622) 15,884 (11,270)
Cash, cash equivalents and restricted cash at beginning of period 39,707 23,823 35,093
Cash, cash equivalents and restricted cash at end of period 14,085 39,707 23,823
Reportable Legal Entities | The Guarantors      
Cash flows from operating activities:      
Net cash provided by (used in) operating activities 39,407 73,154 53,107
Cash flows from investing activities:      
Investment in multi-client data library (25,307) (23,710) (14,884)
Purchase of property, plant, equipment and seismic rental equipment (959) (817) (313)
Proceeds from sale of cost method investments     0
Net cash used in investing activities (26,266) (24,527) (15,197)
Cash flows from financing activities:      
Repayments under revolving line of credit 0   0
Borrowings under revolving line of credit     0
Payments on notes payable and long-term debt (638) (3,167) (6,316)
Cost associated with issuance of debt 0 0 0
Repurchase of common stock     0
Intercompany lending (12,522) (45,609) (34,771)
Proceeds from employee stock purchases and exercise of stock options 0 0  
Payments to repurchase bonds   0  
Net proceeds from issuance of stocks 0    
Dividend payment to noncontrolling interest 0 0  
Other financing activities 0 0 0
Net cash provided by (used in) financing activities (13,160) (48,776) (41,087)
Effect of change in foreign currency exchange rates on cash, cash equivalents and restricted cash 0 0 0
Net decrease in cash, cash equivalents and restricted cash (19) (149) (3,177)
Cash, cash equivalents and restricted cash at beginning of period 66 215 3,392
Cash, cash equivalents and restricted cash at end of period 47 66 215
Reportable Legal Entities | All Other Subsidiaries      
Cash flows from operating activities:      
Net cash provided by (used in) operating activities 5,350 (23,227) (21,382)
Cash flows from investing activities:      
Investment in multi-client data library (2,969) 0 0
Purchase of property, plant, equipment and seismic rental equipment (163) (81) (1,072)
Proceeds from sale of cost method investments     0
Net cash used in investing activities (3,132) (81) (1,072)
Cash flows from financing activities:      
Repayments under revolving line of credit 0   0
Borrowings under revolving line of credit     0
Payments on notes payable and long-term debt 0 (58) (248)
Cost associated with issuance of debt 0 0 0
Repurchase of common stock     0
Intercompany lending 4,539 6,877 2,904
Proceeds from employee stock purchases and exercise of stock options 0 0  
Payments to repurchase bonds   0  
Net proceeds from issuance of stocks 0    
Dividend payment to noncontrolling interest 0 0  
Other financing activities 0 0 0
Net cash provided by (used in) financing activities 4,539 6,819 2,656
Effect of change in foreign currency exchange rates on cash, cash equivalents and restricted cash 319 (260) 1,386
Net decrease in cash, cash equivalents and restricted cash 7,076 (16,749) (18,412)
Cash, cash equivalents and restricted cash at beginning of period 12,646 29,395 47,807
Cash, cash equivalents and restricted cash at end of period 19,722 $ 12,646 $ 29,395
Consolidating Adjustments      
Cash flows from financing activities:      
Cash, cash equivalents and restricted cash at end of period $ 0