| In millions, except per share items | Jun-30-23 | Mar-31-23 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 |
| | 10-Q | 10-Q | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q |
| Revenue | 2.3 | 2.3 | 2.8 | 2.9 | 2.4 | 3.1 | 3.7 | 3.5 |
| Revenue growth | -22.1% | -6.3% | -24.5% | -18.1% | -24.2% | -2.0% | 2.9% | 107.3% |
| Cost of revenue | 1.1 | 1.1 | 0.7 | 1.0 | 1.2 | 1.4 | 1.6 | 1.4 |
| Gross profit | 1.2 | 1.2 | 2.1 | 1.9 | 1.2 | 1.8 | 2.1 | 2.2 |
| Gross margin | 53.0% | 53.5% | 75.1% | 65.1% | 49.9% | 56.5% | 57.6% | 61.0% |
| |
| Operating expenses: | | | | | | | | |
| Sales and marketing | 4.6 | 6.4 | 6.5 | 10.0 | 8.6 | 8.3 | 15.5 | 5.8 |
| General and administrative | 2.4 | 4.2 | 3.9 | 5.4 | 3.9 | 5.3 | 12.1 | 4.3 |
| Research and development | 0.6 | 0.5 | 0.6 | 0.7 | 0.7 | 0.3 | 1.6 | 0.1 |
| (Gain) loss on disposal of assets, net | 0.0 | | | 0.4 | | | | |
| Total operating expenses | 10.4 | 6.9 | 14.0 | 11.1 | 9.3 | 37.3 | 17.1 | 5.9 |
| Operating loss | -4.0 | -5.6 | -11.9 | -9.2 | -8.1 | -35.6 | -15.0 | -3.7 |
| Operating margin | -176.4% | -246.2% | -426.2% | -319.6% | -332.5% | -1131.7% | -404.1% | -104.9% |
| |
| Other expense (income), net: | | | | | | | | |
| Interest income, net | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.2 |
| Gain on changes in fair value of liability warrants | -0.5 | -3.0 | | | | | | |
| (Gain) loss on foreign currency exchange, net | | 0.0 | 0.3 | 0.2 | 0.0 | 0.0 | -0.1 | -0.1 |
| Other | 0.0 | 0.0 | | 0.0 | 0.0 | | | |
| Loss before income tax provision | -3.5 | -2.6 | -12.2 | -9.4 | -8.1 | -35.6 | -17.7 | -3.9 |
| Income tax expense | 0.0 | 0.0 | -0.4 | 0.0 | 0.0 | -0.1 | 0.0 | 0.0 |
| Net loss | -3.5 | -2.7 | -11.8 | -9.4 | -8.1 | -35.5 | -17.7 | -3.9 |
| |
| Net loss per share - basic and diluted: | | | | | | | | |
| Net loss per share - basic (in dollars per share) | ($1.08) | ($1.56) | ($0.52) | ($24.45) | ($21.87) | ($2.49) | ($1.04) | ($0.86) |
| Net loss per share - diluted (in dollars per share) | ($1.08) | ($1.56) | ($0.52) | ($24.45) | ($21.87) | ($2.49) | ($1.04) | ($0.86) |
| |
| Shares used to compute basic net loss per share (in shares) | 3.2 | 1.7 | 22.6 | 0.4 | 0.4 | 12.4 | 17.1 | 4.6 |
| Shares used to compute diluted net loss per share (in shares) | 3.2 | 1.7 | 22.6 | 0.4 | 0.4 | 12.4 | 17.1 | 4.6 |