| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 |
| | 10-K/A | 10-K/A | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Revenues | 70.6 | 62.7 | 53.6 | 104.9 | 111.3 | 106.5 | 114.3 | 124.0 |
| Revenues growth | 12.6% | 17.0% | -48.9% | -5.7% | 4.5% | -6.8% | -7.8% | -19.1% |
| Cost of revenues | 10.0 | 11.4 | 10.6 | 11.4 | 12.3 | 12.9 | 13.9 | |
| Gross profit | 60.6 | 51.3 | 43.0 | 93.5 | 99.1 | 93.6 | 100.4 | 105.8 |
| Gross margin | 85.8% | 81.8% | 80.3% | 89.1% | 89.0% | 87.9% | 87.9% | 85.4% |
| |
| Operating expenses: | | | | | | | | |
| Sales and marketing | 33.1 | 30.3 | 30.6 | 51.3 | 58.5 | 57.3 | 58.4 | 65.6 |
| Product development | 2.1 | 2.6 | 3.1 | 6.7 | 9.0 | 9.2 | 9.1 | 12.2 |
| General and administrative | 17.9 | 19.8 | 20.5 | 18.4 | 23.3 | 22.6 | 22.7 | 24.2 |
| Total operating expenses | 53.0 | 52.6 | 57.1 | 76.4 | 90.8 | 89.1 | 90.2 | 102.0 |
| Operating income | 7.6 | -1.3 | -14.1 | 17.0 | 8.2 | 4.5 | 10.2 | 3.8 |
| Operating margin | 10.7% | -2.1% | -26.3% | 16.2% | 7.4% | 4.3% | 8.9% | 3.1% |
| Other income, net | 2.4 | 4.0 | 0.5 | 0.0 | 0.0 | 0.2 | -0.2 | -1.2 |
| Income from continuing operations before income taxes | 10.0 | 2.7 | -13.6 | 17.0 | | | | |
| Income tax expense | 3.3 | 1.8 | -2.4 | 4.7 | 3.6 | 3.1 | 4.0 | -5.9 |
| Income from continuing operations | 6.7 | 0.9 | -11.2 | 12.3 | | | | |
| Income (loss) from discontinued operations, net of taxes | -0.1 | 0.0 | -3.4 | -8.1 | | | | |
| Net income | 13.3 | 1.8 | -14.6 | 16.4 | | | | |
| Net income attributable to non-controlling interest | 0.0 | 0.0 | -1.1 | | | | | |
| Net income attributable to Travelzoo | 6.6 | 0.9 | -13.4 | 4.2 | 4.7 | 3.5 | 6.6 | 10.9 |
| Net income attributable to Travelzoo—continuing operations | 6.7 | 0.9 | -10.0 | 12.3 | 4.7 | 1.6 | 6.0 | 8.5 |
| Net income (loss) attributable to Travelzoo—discontinued operations | -0.1 | 0.0 | -3.4 | -8.1 | | 1.9 | 0.6 | 2.3 |
| |
| Income per share—basic | | | | | | | | |
| Continuing operations (in dollars per share) | 0.0 | 0.0 | 0.0 | 0.0 | | 0.0 | 0.0 | 0.0 |
| Discontinued operations (in dollars per share) | | | 0.0 | 0.0 | | 0.0 | 0.0 | 0.0 |
| |
| Net income per share - basic (in dollars per share) | $0.54 | $0.08 | ($1.18) | $0.35 | $0.38 | $0.27 | $0.47 | $0.74 |
| |
| Income per share—diluted | | | | | | | | |
| Continuing operations (in dollars per share) | 0.0 | 0.0 | 0.0 | 0.0 | | 0.0 | 0.0 | 0.0 |
| Discontinuing operations (in dollars per share) | | | 0.0 | 0.0 | | 0.0 | 0.0 | 0.0 |
| Income per share - diluted (in dollars per share) | $0.53 | $0.07 | ($1.18) | $0.35 | $0.37 | $0.27 | $0.47 | $0.74 |
| |
| Shares used in per share calculation from operations—basic (in shares) | 12.4 | 11.6 | 11.3 | 11.8 | 12.3 | 12.9 | 14.0 | 14.7 |
| Shares used in per share calculation from operations—diluted (in shares) | 12.6 | 13.0 | 11.3 | 12.0 | 12.5 | 12.9 | 14.0 | 14.7 |