Condensed Consolidating Financial Information - Income Statement (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Condensed Income Statements
Net revenues	$ 16,234,000	$ 53,239,000	$ 95,379,000	$ 131,970,000
Cost of services and products	14,945,000	27,951,000	59,995,000	77,187,000
Impairment of multi-client data library	0	0	1,167,000	0
Gross profit (loss)	1,289,000	25,288,000	34,217,000	54,783,000
Total operating expenses			40,377,000
Total operating expenses	12,453,000	21,430,000	44,527,000	69,415,000
Impairment of goodwill	0	0	4,150,000	0
Income (loss) from operations	(11,164,000)	3,858,000	(10,310,000)	(14,632,000)
Interest expense, net	(3,669,000)	(3,155,000)	(10,304,000)	(9,378,000)
Intercompany interest, net	0	0	0	0
Equity in earnings (losses) of investments	0	0	0	0
Other income (expense)	(525,000)	(242,000)	6,675,000	(938,000)
Net income (loss) before income taxes	(15,358,000)	461,000	(13,939,000)	(24,948,000)
Income tax expense	1,056,000	3,790,000	9,982,000	7,916,000
Net loss	(16,414,000)	(3,329,000)	(23,921,000)	(32,864,000)
Net income attributable to noncontrolling interest	(193,000)	(394,000)	(168,000)	(841,000)
Net income (loss) attributable to ION	(16,607,000)	(3,723,000)	(24,089,000)	(33,705,000)
Comprehensive net income (loss)	(15,642,000)	(4,357,000)	(25,664,000)	(33,862,000)
Comprehensive income attributable to noncontrolling interest	(144,000)	(394,000)	(119,000)	(841,000)
Comprehensive net loss attributable to ION	(15,786,000)	(4,751,000)	(25,783,000)	(34,703,000)
Reportable legal entities | ION Geophysical Corporation
Condensed Income Statements
Net revenues	0	0	0	0
Cost of services and products	0	0	0	0
Impairment of multi-client data library			0
Gross profit (loss)	0	0	0	0
Total operating expenses			19,787,000
Total operating expenses	6,335,000	9,514,000		31,330,000
Impairment of goodwill			0
Income (loss) from operations	(6,335,000)	(9,514,000)	(19,787,000)	(31,330,000)
Interest expense, net	(3,368,000)	(3,197,000)	(9,923,000)	(9,560,000)
Intercompany interest, net	(247,000)	65,000	(705,000)	588,000
Equity in earnings (losses) of investments	(6,081,000)	8,988,000	1,865,000	7,330,000
Other income (expense)	(4,000)	16,000	8,139,000	4,000
Net income (loss) before income taxes	(16,035,000)	(3,642,000)	(20,411,000)	(32,968,000)
Income tax expense	572,000	81,000	3,678,000	737,000
Net loss	(16,607,000)	(3,723,000)	(24,089,000)	(33,705,000)
Net income attributable to noncontrolling interest	0	0	0	0
Net income (loss) attributable to ION	(16,607,000)	(3,723,000)	(24,089,000)	(33,705,000)
Comprehensive net income (loss)	(15,786,000)	(4,751,000)	(25,783,000)	(34,703,000)
Comprehensive income attributable to noncontrolling interest	0	0	0	0
Comprehensive net loss attributable to ION	(15,786,000)	(4,751,000)	(25,783,000)	(34,703,000)
Reportable legal entities | The Guarantors
Condensed Income Statements
Net revenues	9,799,000	21,474,000	61,969,000	65,552,000
Cost of services and products	11,326,000	20,165,000	46,357,000	56,106,000
Impairment of multi-client data library			1,167,000
Gross profit (loss)	(1,527,000)	1,309,000	14,445,000	9,446,000
Total operating expenses			13,974,000
Total operating expenses	4,270,000	7,976,000		26,204,000
Impairment of goodwill			0
Income (loss) from operations	(5,797,000)	(6,667,000)	471,000	(16,758,000)
Interest expense, net	(322,000)	(49,000)	(484,000)	(156,000)
Intercompany interest, net	(1,425,000)	(2,077,000)	(4,884,000)	521,000
Equity in earnings (losses) of investments	1,722,000	18,398,000	7,614,000	26,786,000
Other income (expense)	(282,000)	(55,000)	(276,000)	(265,000)
Net income (loss) before income taxes	(6,104,000)	9,550,000	2,441,000	10,128,000
Income tax expense	185,000	(403,000)	770,000	(532,000)
Net loss	(6,289,000)	9,953,000	1,671,000	10,660,000
Net income attributable to noncontrolling interest	0	0	0	0
Net income (loss) attributable to ION	(6,289,000)	9,953,000	1,671,000	10,660,000
Comprehensive net income (loss)	(6,289,000)	9,953,000	1,628,000	10,617,000
Comprehensive income attributable to noncontrolling interest	0	0	0	0
Comprehensive net loss attributable to ION	(6,289,000)	9,953,000	1,628,000	10,617,000
Reportable legal entities | All Other Subsidiaries
Condensed Income Statements
Net revenues	6,435,000	31,765,000	33,410,000	66,418,000
Cost of services and products	3,619,000	7,786,000	13,638,000	21,081,000
Impairment of multi-client data library			0
Gross profit (loss)	2,816,000	23,979,000	19,772,000	45,337,000
Total operating expenses			6,616,000
Total operating expenses	1,848,000	3,940,000		11,881,000
Impairment of goodwill			4,150,000
Income (loss) from operations	968,000	20,039,000	9,006,000	33,456,000
Interest expense, net	21,000	91,000	103,000	338,000
Intercompany interest, net	1,672,000	2,012,000	5,589,000	(1,109,000)
Equity in earnings (losses) of investments	0	0	0	0
Other income (expense)	(239,000)	(203,000)	(1,188,000)	(677,000)
Net income (loss) before income taxes	2,422,000	21,939,000	13,510,000	32,008,000
Income tax expense	299,000	4,112,000	5,534,000	7,711,000
Net loss	2,123,000	17,827,000	7,976,000	24,297,000
Net income attributable to noncontrolling interest	(193,000)	(394,000)	(168,000)	(841,000)
Net income (loss) attributable to ION	1,930,000	17,433,000	7,808,000	23,456,000
Comprehensive net income (loss)	2,746,000	16,403,000	6,113,000	22,444,000
Comprehensive income attributable to noncontrolling interest	(144,000)	(394,000)	(119,000)	(841,000)
Comprehensive net loss attributable to ION	2,602,000	16,009,000	5,994,000	21,603,000
Consolidating Adjustments
Condensed Income Statements
Net revenues	0	0	0	0
Cost of services and products	0	0	0	0
Impairment of multi-client data library			0
Gross profit (loss)	0	0	0	0
Total operating expenses			0
Total operating expenses	0	0		0
Impairment of goodwill			0
Income (loss) from operations	0	0	0	0
Interest expense, net	0	0	0	0
Intercompany interest, net	0	0	0	0
Equity in earnings (losses) of investments	4,359,000	(27,386,000)	(9,479,000)	(34,116,000)
Other income (expense)	0	0	0	0
Net income (loss) before income taxes	4,359,000	(27,386,000)	(9,479,000)	(34,116,000)
Income tax expense	0	0	0	0
Net loss	4,359,000	(27,386,000)	(9,479,000)	(34,116,000)
Net income attributable to noncontrolling interest	0	0	0	0
Net income (loss) attributable to ION	4,359,000	(27,386,000)	(9,479,000)	(34,116,000)
Comprehensive net income (loss)	3,687,000	(25,962,000)	(7,622,000)	(32,220,000)
Comprehensive income attributable to noncontrolling interest	0	0	0	0
Comprehensive net loss attributable to ION	$ 3,687,000	$ (25,962,000)	$ (7,622,000)	$ (32,220,000)