| In millions, except per share items | Dec-31-20 | Dec-31-19 |
| | 10-K | 10-K |
| Cash flows from operating activities | | |
| Net loss | -68.8 | -79.5 |
| |
| Adjustment to reconcile net loss to net cash used in operating activities | | |
| Stock-based compensation | 5.1 | 0.1 |
| Depreciation and amortization | 1.6 | 2.1 |
| Loss on debt extinguishment | | 6.1 |
| Loss from write-down of property, plant and equipment | 0.0 | |
| |
| Non-cash interest expense | | |
| |
| Commitment fee for SEPA agreement settled by common stock - related party | | |
| Other | | -0.1 |
| |
| Changes in operating assets and liabilities: | | |
| Prepaid expenses | -1.6 | -0.5 |
| Inventory | -0.2 | 0.6 |
| Vendor deposits | -0.6 | 0.1 |
| Accounts payable and accrued expenses - related party | | |
| Contract liabilities | -0.2 | -0.5 |
| Note payable | | |
| Other | -0.4 | |
| Net cash used in operating activities | -26.6 | -23.8 |
| |
| Cash flows from investing activities | | |
| Purchases of property, plant and equipment | -3.6 | -2.3 |
| Net cash used in investing activities | -6.6 | -2.9 |
| |
| Cash flows from financing activities | | |
| |
| Proceeds from issuance of convertible notes - related party | | |
| |
| Proceeds from issuance of common stock and warrants - related party | | |
| Payment of equity issuance costs - related party | | |
| Net cash provided by financing activities | 154.2 | 22.1 |
| |
| Non-cash investing and financing activities | | |
| Accrued and unpaid capital expenditures | 0.4 | 0.1 |
| |
| Supplemental disclosures | | |
| Cash paid for interest | 0.1 | 0.0 |