| 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 | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K/A | 10-K |
| Total net revenues | 41.2 | 27.0 | 21.5 | 37.3 | 64.7 | 72.6 | | 78.1 |
| Total net revenues growth | 52.6% | 25.7% | -42.3% | -42.4% | -11.0% | | -100.0% | -6.1% |
| Total cost of revenues | 30.3 | 18.8 | 16.1 | 24.8 | 52.5 | 53.7 | | 61.3 |
| Gross profit | 10.9 | 8.2 | 5.4 | 12.5 | 12.2 | 18.9 | | 16.7 |
| Gross margin | 26.5% | 30.4% | 25.2% | 33.4% | 18.8% | 26.1% | | 21.4% |
| |
| Selling and administrative expenses: | | | | | | | | |
| Selling | 2.3 | 1.8 | 1.7 | 2.1 | 4.8 | 5.4 | | 4.9 |
| Administrative | 10.5 | 9.5 | 10.4 | 13.0 | 15.6 | 16.1 | | 15.6 |
| Total selling and administrative expenses | 12.8 | 11.3 | 12.0 | 15.1 | 20.4 | 21.5 | 1.2 | 20.5 |
| Gain on disposal of assets | -0.5 | 0.0 | -0.1 | -0.1 | -2.1 | -0.2 | | -0.4 |
| Loss from operations | -2.4 | -3.1 | -6.7 | -2.7 | -10.3 | -2.8 | 19.9 | -4.2 |
| Operating margin | -5.7% | -11.6% | -31.1% | -7.3% | -16.0% | -3.9% | | -5.4% |
| |
| Other income (expense): | | | | | | | | |
| Interest income | 0.0 | 0.1 | | 0.0 | | 0.0 | | 0.4 |
| Interest expense | -0.3 | -0.3 | -0.5 | -0.3 | -0.4 | -0.2 | | -0.1 |
| Foreign currency transaction (loss) gain | 0.3 | -0.1 | -0.3 | -0.3 | 0.3 | -0.3 | -0.4 | 1.6 |
| |
| Unrealized loss on equity holdings | | | | | | | | |
| Other (expense) income, net | -0.2 | 0.1 | 3.1 | 1.7 | 0.0 | 0.0 | | 0.0 |
| Total other expense | -4.7 | 12.1 | 5.2 | -1.8 | 1.0 | 0.7 | 10.9 | 2.0 |
| Income tax (expense) benefit | -0.5 | -3.2 | 1.3 | 2.1 | 2.4 | 3.4 | | 13.0 |
| Net loss attributable to FG Group Holdings | -7.2 | 17.9 | -0.3 | -10.1 | -12.3 | -3.6 | 8.9 | -17.5 |
| |
| Net loss per share: | | | | | | | | |
| Basic | ($0.37) | $1.00 | ($0.02) | ($0.70) | ($0.86) | ($0.25) | $0.28 | ($1.24) |
| Diluted | ($0.37) | $1.00 | ($0.02) | ($0.70) | ($0.86) | ($0.25) | $0.28 | ($1.24) |
| |
| Weighted-average shares used in computing net loss per share: | | | | | | | | |
| Basic | 19.3 | 18.0 | 14.7 | 14.5 | 14.4 | 14.5 | 31.9 | 14.1 |
| Diluted | 19.3 | 18.2 | 14.7 | 14.5 | 14.4 | 14.5 | 31.9 | 14.1 |