Condensed Consolidating Financial Information - Cash Flow, Restricted Cash Reconciliation (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Restricted Cash and Cash Equivalents [Abstract]
Cash and cash equivalents	$ 33,065	$ 33,551	$ 52,056
Total cash, cash equivalents, and restricted cash shown in consolidated statements of cash flows	33,118	33,854	52,419	$ 53,433
Prepaid expenses and other current assets
Restricted Cash and Cash Equivalents [Abstract]
Restricted cash	53	0	60
Other long-term assets
Restricted Cash and Cash Equivalents [Abstract]
Restricted cash	0	303	303
Reportable Legal Entities | ION Geophysical Corporation
Restricted Cash and Cash Equivalents [Abstract]
Cash and cash equivalents	8,426	13,782	39,344
Total cash, cash equivalents, and restricted cash shown in consolidated statements of cash flows	8,479	14,085	39,707	23,823
Reportable Legal Entities | ION Geophysical Corporation | Prepaid expenses and other current assets
Restricted Cash and Cash Equivalents [Abstract]
Restricted cash	53		60
Reportable Legal Entities | ION Geophysical Corporation | Other long-term assets
Restricted Cash and Cash Equivalents [Abstract]
Restricted cash		303	303
Reportable Legal Entities | The Guarantors
Restricted Cash and Cash Equivalents [Abstract]
Cash and cash equivalents	26	47	66
Total cash, cash equivalents, and restricted cash shown in consolidated statements of cash flows	26	47	66	215
Reportable Legal Entities | The Guarantors | Prepaid expenses and other current assets
Restricted Cash and Cash Equivalents [Abstract]
Restricted cash	0		0
Reportable Legal Entities | The Guarantors | Other long-term assets
Restricted Cash and Cash Equivalents [Abstract]
Restricted cash		0	0
Reportable Legal Entities | All Other Subsidiaries
Restricted Cash and Cash Equivalents [Abstract]
Cash and cash equivalents	24,613	19,722	12,646
Total cash, cash equivalents, and restricted cash shown in consolidated statements of cash flows	24,613	19,722	12,646	$ 29,395
Reportable Legal Entities | All Other Subsidiaries | Prepaid expenses and other current assets
Restricted Cash and Cash Equivalents [Abstract]
Restricted cash	0		0
Reportable Legal Entities | All Other Subsidiaries | Other long-term assets
Restricted Cash and Cash Equivalents [Abstract]
Restricted cash		0	$ 0
Consolidating Adjustments
Restricted Cash and Cash Equivalents [Abstract]
Cash and cash equivalents		$ 0
Total cash, cash equivalents, and restricted cash shown in consolidated statements of cash flows	$ 0