| In millions, except per share items | Jun-30-21 | Mar-31-21 | Dec-31-20 | Sep-30-20 | Jun-30-20 | Mar-31-20 | Dec-31-19 | Sep-30-19 |
| | 10-Q | 10-Q | | 10-Q | 10-Q | 10-Q | 10-K | 10-Q |
| ASSETS | | | | | | | | |
| Current assets: | | | | | | | | |
| Cash and cash equivalents | 22.6 | 27.5 | | 9.7 | 5.9 | 11.0 | 15.5 | 6.7 |
| Restricted cash | 0.2 | 0.2 | | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
| Accounts receivable, net | 9.8 | 9.9 | | 16.4 | 13.6 | 8.5 | 20.4 | 20.4 |
| Inventories | 17.1 | 20.9 | | 26.9 | 32.1 | 29.5 | 23.0 | 22.6 |
| Prepaid expenses and other receivables | 1.8 | 2.7 | | 1.0 | 2.3 | 2.6 | 2.5 | 1.7 |
| Total current assets | 51.5 | 61.2 | | 54.3 | 54.0 | 51.9 | 61.6 | 51.6 |
| Property, plant and equipment, net | 15.9 | 15.9 | | | | | | |
| Intangible assets, net | 19.2 | 19.5 | | 35.3 | 34.7 | 34.7 | 44.6 | 44.3 |
| Goodwill | 0.5 | 0.5 | | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
| Other assets | 3.3 | 3.7 | | 3.8 | 4.2 | 3.5 | 3.8 | 3.8 |
| Total assets | 90.4 | 100.8 | | 190.3 | 190.3 | 186.9 | 206.9 | 196.2 |
| |
| LIABILITIES AND STOCKHOLDERS’ DEFICIT | | | | | | | | |
| Current liabilities: | | | | | | | | |
| Accounts payable | 4.0 | 4.7 | | 8.8 | 10.6 | 7.3 | 6.9 | 8.8 |
| Accrued expenses | 7.6 | 8.8 | | 9.2 | 9.3 | 10.4 | 9.3 | 10.4 |
| Customer deposits | 0.6 | | | | | | | |
| Capital lease obligation, current | 0.5 | 0.4 | | | | | 0.4 | |
| Total current liabilities | 12.6 | 13.9 | | 21.9 | 23.7 | 18.1 | 16.6 | 35.0 |
| Senior Convertible Notes | | | | | | | 21.8 | 59.4 |
| Revolver, net of debt issuance costs | 25.0 | 25.0 | | 25.0 | 25.0 | 25.0 | 25.0 | 25.0 |
| 2023 Term Loans, net of debt issuance costs | 91.2 | 88.9 | | 95.4 | 91.7 | 89.0 | 86.5 | 74.4 |
| Derivative liabilities | | | | 6.7 | 5.6 | 8.0 | 6.8 | |
| Deferred tax liability | 0.2 | 0.2 | | 0.3 | 0.2 | 0.2 | 0.2 | 0.2 |
| Other long term liabilities | 4.7 | 4.8 | | 2.6 | 2.7 | 2.1 | 2.3 | 2.4 |
| Total liabilities | 133.9 | 133.1 | | 230.3 | 228.1 | 218.8 | 212.2 | 196.3 |
| |
| Commitments and Contingencies | | | | | | | | |
| Mezzanine equity: | | | | | | | | |
| Series D Preferred Stock, $0.01 par value, 1,000,000 shares authorized; 85.412 shares issued and outstanding as of June 30, 2021 | 15.4 | 15.4 | | | | | | |
| |
| Stockholders’ deficit: | | | | | | | | |
| Common stock | 1.2 | 1.2 | | 0.1 | 0.1 | 0.6 | 0.6 | 0.6 |
| Additional paid-in capital | 197.4 | 195.3 | | 126.3 | 127.6 | 118.5 | 118.0 | 117.8 |
| Accumulated deficit | -254.2 | -241.3 | | -163.2 | -162.6 | -148.3 | -121.5 | -116.2 |
| Accumulated other comprehensive loss, net of taxes | -3.3 | -2.8 | | -3.3 | -2.8 | -2.6 | -2.4 | -2.3 |
| Total stockholders’ deficit | -58.9 | -47.7 | | -40.1 | -37.8 | -31.8 | -5.3 | -0.2 |
| Total liabilities, mezzanine equity and stockholders' deficit | 90.4 | 100.8 | | 190.3 | 190.3 | 186.9 | 206.9 | 196.2 |