| In millions, except per share items | Sep-30-22 | Sep-30-21 | Sep-30-20 | Sep-30-19 | Sep-30-18 | Sep-30-17 | Sep-30-16 | Sep-30-15 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K/A |
| REVENUE- DIGITAL ASSET SALES | 4.4 | | 0.1 | 1.8 | 4.3 | 4.9 | 6.0 | 6.3 |
| REVENUE- DIGITAL ASSET SALES growth | | -100.0% | -93.2% | -58.1% | -11.7% | -19.1% | -4.2% | -21.2% |
| OPERATING EXPENSES- | | | | | | | | |
| RESEARCH AND DEVELOPMENT EXPENSES | 5.4 | 4.0 | 2.0 | 1.3 | 0.6 | 0.1 | 0.3 | 0.4 |
| SELLING, GENERAL AND ADMINISTRATIVE EXPENSES | 11.5 | 6.5 | 4.8 | 4.2 | 2.5 | 3.1 | 3.4 | 3.0 |
| SELLING AND TRANSACTIONAL COSTS FOR DIGITAL ASSETS | 3.4 | | | | | | | |
| Total operating expenses | 16.9 | 10.4 | 6.9 | 5.4 | 3.1 | | | |
| OPERATING LOSS | -12.6 | -10.4 | -6.8 | -5.0 | -2.3 | -3.2 | -2.7 | -2.3 |
| Operating margin | -288.4% | | -5597.8% | -277.7% | -52.5% | -66.5% | -44.7% | -37.0% |
| |
| OTHER (EXPENSE): | | | | | | | | |
| Interest income (expense), net | -8.0 | -14.9 | -6.1 | -2.9 | -1.2 | -0.4 | -0.3 | -0.2 |
| Other (expense) income | 0.5 | | -0.1 | 0.0 | 0.0 | 0.1 | 0.0 | 0.0 |
| Total other (expense), net | -0.5 | | 0.1 | 0.0 | 0.0 | -0.1 | 0.0 | 0.0 |
| LOSS BEFORE INCOME TAXES | -20.1 | -25.4 | | | | | | |
| NET LOSS | -20.1 | -25.4 | -13.6 | -7.6 | -3.3 | -3.9 | -1.7 | -2.6 |
| |
| Basic and diluted loss per share | ($0.50) | ($0.86) | ($0.62) | ($0.42) | ($0.38) | ($1.01) | ($1.22) | ($2.33) |
| |
| Weighted average shares of common stock outstanding- basic and diluted | 40.4 | 29.4 | 21.8 | 18.1 | 8.6 | 3.8 | 1.4 | 1.1 |