| Schedule of Segment Reporting Information, by Segment [Table Text Block] |
| | | Three Months Ended June 30, | | | Six Months Ended June 30, | |
| | | 2024 | | | 2023 | | | 2024 | | | 2023 | |
| Fluent segment revenue(1): | | | | | | | | | | | | | | | | |
| United States | | $ | 34,654 | | | $ | 40,200 | | | $ | 74,970 | | | $ | 83,108 | |
| International | | | 20,911 | | | | 39,809 | | | | 43,773 | | | | 72,139 | |
| Fluent segment revenue | | $ | 55,565 | | | $ | 80,009 | | | $ | 118,743 | | | $ | 155,247 | |
| All Other segment revenue(1): | | | | | | | | | | | | | | | | |
| United States | | $ | 3,152 | | | $ | 2,136 | | | $ | 5,957 | | | $ | 4,152 | |
| International | | | — | | | | — | | | | — | | | | — | |
| All Other segment revenue | | $ | 3,152 | | | $ | 2,136 | | | $ | 5,957 | | | $ | 4,152 | |
| Segment EBITDA | | | | | | | | | | | | | | | | |
| Fluent segment EBITDA | | $ | (7,041 | ) | | $ | 9,685 | | | $ | (8,890 | ) | | $ | (18,894 | ) |
| All Other segment EBITDA | | | (770 | ) | | | 149 | | | | (303 | ) | | | (66 | ) |
| Total EBITDA | | | (7,811 | ) | | | 9,834 | | | | (9,193 | ) | | | (18,960 | ) |
| Depreciation and amortization | | | 2,567 | | | | 3,095 | | | | 5,138 | | | | 5,454 | |
| Total loss from operations | | $ | (10,378 | ) | | $ | 6,739 | | | $ | (14,331 | ) | | $ | (24,414 | ) |
| | | June 30, | | | December 31, | |
| | | 2024 | | | 2023 | |
| Total assets: | | | | | | |
| Fluent | | $ | 83,680 | | | $ | 97,629 | |
| All Other | | | 14,815 | | | | 14,238 | |
| Total assets | | $ | 98,495 | | | $ | 111,867 | |
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