| In millions, except per share items | Jun-30-21 | Mar-31-21 | Sep-30-20 | Jun-30-20 | Jun-05-20 | Mar-31-20 | Mar-05-20 | Dec-31-19 |
| | 10-Q | 10-Q | 10-Q | 10-Q | 8-K | 10-Q | 8-K | 10-K |
| Revenues: | | | | | | | | |
| Revenue, net | 10.4 | 11.6 | 14.3 | 13.6 | 13.6 | 7.4 | 7.4 | 16.0 |
| Revenue, net growth | -23.2% | 55.6% | -22.3% | -25.9% | -25.9% | -43.2% | -43.2% | -4.8% |
| Costs and expenses: | | | | | | | | |
| Cost of revenues | 13.1 | 12.8 | 14.2 | 11.1 | | 8.6 | | 14.0 |
| Selling, general and administrative expenses | 5.7 | 6.3 | 6.5 | 5.0 | 5.0 | 6.7 | 6.7 | 5.1 |
| Impairment charges | | 0.0 | | | | 8.4 | | |
| Product development and research expenses | 2.2 | 1.5 | 2.4 | 1.9 | 1.9 | 1.8 | 1.8 | 3.0 |
| Total costs and expenses | 21.1 | 20.6 | 23.1 | 18.0 | 18.0 | 25.5 | 16.9 | 22.1 |
| Operating loss | -10.7 | -9.0 | -8.8 | -4.4 | -21.9 | -18.1 | -18.1 | -6.2 |
| Operating margin | -102.2% | -77.4% | -61.4% | -32.1% | -160.8% | -242.4% | -242.4% | -38.7% |
| |
| Other income (expense): | | | | | | | | |
| Foreign currency exchange gain (loss) | 0.8 | -2.1 | 1.9 | 2.1 | | -1.6 | -1.6 | 0.9 |
| Interest and other expense, net | -3.0 | -4.1 | | -7.5 | | -5.9 | | |
| Gain on debt restructuring | | 22.4 | 10.9 | | | | | -0.9 |
| Inducement loss | | -1.9 | -0.7 | | | | | |
| Change in the fair value of derivative liabilities | | -3.2 | 4.3 | -4.6 | | -1.3 | | |
| Loss before income tax expense | -12.9 | 2.2 | -0.5 | -14.4 | -14.3 | -26.8 | -26.8 | 19.8 |
| Income tax (benefit) expense | 0.0 | 0.0 | 0.0 | 0.0 | | 0.1 | 0.1 | 0.0 |
| Tax rate | 0.0% | 1.4% | | 0.1% | 0.0% | | | 0.1% |
| Loss attributable to common shareholders | -12.9 | 2.2 | -0.5 | -14.3 | -14.3 | -26.8 | -26.8 | 19.8 |
| |
| Loss per share | | | | | | | | |
| Basic loss per share (in dollars per share) | ($0.14) | $0.04 | ($0.08) | ($2.56) | ($2.56) | ($4.98) | ($0.50) | ($0.10) |
| Diluted loss per share (in dollars per shares) | ($0.14) | $0.03 | ($0.08) | ($2.56) | ($2.56) | ($4.98) | ($0.50) | ($0.10) |
| |
| Weighted average shares of common stock outstanding: | | | | | | | | |
| Basic (in shares) | 93.4 | 58.5 | 6.1 | 5.6 | 5.6 | 5.4 | 53.9 | 53.8 |
| Diluted (in shares) | 93.4 | 77.1 | 6.1 | 5.6 | 5.6 | 5.4 | 53.9 | 53.8 |