| In millions, except per share items | Jun-30-23 | Dec-31-22 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 |
| | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q |
| REVENUE- DIGITAL ASSET SALES | | | | | 4.4 | 4.4 | | |
| REVENUE- DIGITAL ASSET SALES growth | | -99.8% | | | | 95619.3% | -100.0% | -100.0% |
| OPERATING EXPENSES- | | | | | | | | |
| RESEARCH AND DEVELOPMENT EXPENSES | | 6.2 | 5.4 | 4.3 | 3.9 | 3.9 | 4.0 | 3.8 |
| SELLING, GENERAL AND ADMINISTRATIVE EXPENSES | | 9.1 | 11.5 | 9.2 | 8.5 | 8.2 | 6.5 | 6.6 |
| SELLING AND TRANSACTIONAL COSTS FOR DIGITAL ASSETS | | | 3.4 | 3.4 | 3.3 | 3.1 | | |
| Total operating expenses | | 19.0 | 16.9 | 13.5 | 12.4 | 12.1 | 10.4 | 10.4 |
| OPERATING LOSS | | -15.4 | -12.6 | -9.2 | -8.0 | -7.8 | -10.4 | -10.4 |
| Operating margin | | -176730.0% | -288.4% | -210.0% | -183.3% | -178.1% | | |
| |
| OTHER (EXPENSE): | | | | | | | | |
| Interest income (expense), net | | -3.8 | -8.0 | -13.2 | -18.2 | -17.7 | -14.9 | -11.7 |
| Other (expense) income | | 0.6 | 0.5 | 0.3 | | | | |
| Total other (expense), net | | -0.6 | -0.5 | -0.3 | | | | |
| LOSS BEFORE INCOME TAXES | | -26.9 | -28.4 | -33.7 | | -30.7 | -25.4 | |
| NET LOSS | | -18.5 | -20.1 | -22.1 | -26.2 | -25.4 | -25.4 | -22.1 |
| NET LOSS AVAILABLE TO COMMON SHAREHOLDERS | | | | -3.0 | | | | |
| |
| Basic and diluted loss per share | | ($0.44) | ($0.51) | ($0.60) | ($0.76) | ($0.80) | ($0.86) | ($0.82) |
| |
| Weighted average shares of common stock outstanding- basic and diluted | | 42.5 | 39.4 | 36.6 | 33.4 | 30.7 | 28.1 | 26.2 |