| In millions, except per share items | Sep-30-22 | Sep-05-22 | Jun-30-22 | Jun-05-22 | Mar-31-22 | Mar-05-22 | Dec-31-21 | Dec-05-21 |
| | 10-Q | 8-K | 10-Q | 8-K | 10-Q | 8-K | 10-K | 8-K |
| Cash flows from operating activities | | | | | | | | |
| Net loss | -4.2 | | -4.0 | | -4.2 | -4.2 | -5.6 | -14.6 |
| |
| Adjustments to reconcile net loss to net cash used in in operating activities: | | | | | | | | |
| Depreciation and amortization expense | 0.3 | | 0.3 | | 0.3 | 0.3 | 0.2 | 0.7 |
| Amortization of debt issuance costs | | | 0.0 | | 0.0 | 0.0 | 0.0 | 0.2 |
| Stock-based compensation | 0.5 | | 0.6 | | 0.8 | 0.8 | 0.3 | 1.3 |
| Bad debt expense | 0.0 | | 0.0 | | 0.0 | 0.0 | | 0.3 |
| Inventory reserve | 0.2 | | | | | | | |
| Gain on debt forgiveness - Paycheck Protection Program note payable | | | | | | | | |
| Change in fair value of warrant liabilities | | | | | | | -1.0 | |
| Foregiveness of employee promissory notes | | | | | | | | |
| Other non-cash | 0.3 | | -0.2 | | 0.1 | 0.1 | | |
| Change in operating assets and liabilities: | | | | | | | | |
| Accounts receivable | 1.1 | | -0.7 | | -1.1 | -1.1 | | 0.1 |
| Inventory, net | 0.5 | | -3.3 | | 0.7 | 0.7 | -1.5 | -9.9 |
| Prepaid expenses and other current assets | 2.5 | | 1.2 | | 0.3 | 0.3 | -2.4 | -4.1 |
| Other assets | 0.0 | | 0.0 | | 0.0 | 0.0 | 2.1 | 0.2 |
| Accounts payable | 0.8 | | -1.0 | | 0.5 | 0.5 | -1.4 | -1.4 |
| Accrued liabilities | 0.3 | | 0.8 | | -1.2 | -1.2 | 0.1 | 0.4 |
| Contract liabilities | 0.4 | | 0.8 | | 0.6 | | 1.1 | |
| Other liabilities | -1.8 | | 0.0 | | 0.0 | 0.0 | -0.1 | -0.1 |
| Net cash used in operating activities | 0.9 | | -5.4 | | -3.3 | -3.3 | -7.4 | -21.2 |
| |
| Cash flows from investing activities | | | | | | | | |
| Cash paid for asset acquisition | | | | | | | | |
| Purchases of property and equipment | 0.1 | | 0.0 | | -0.3 | | -0.2 | |
| Capitalized software development costs | -0.2 | | -0.2 | | 0.0 | 0.0 | | |
| Loans for employee advances | | | | | | | 0.0 | |
| Proceeds from sale of property and equipment | 0.0 | | | | | | | |
| Net cash used in investing activities | -0.1 | | -0.1 | | -0.3 | -0.3 | -0.2 | -9.5 |
| |
| Cash flows from financing activities | | | | | | | | |
| Borrowings on line of credit | | | 3.5 | | 3.0 | | | |
| Repayments on line of credit | -2.1 | | | | | | | |
| Repayments of long-term debt | | | | | | | -1.3 | |
| Proceeds from issuance of preferred stock and warrants, net of issuance costs | | | | | | | 0.0 | |
| Proceeds from exercise of employee stock options | 0.0 | | | | | | 0.0 | 0.1 |
| Taxes paid for restricted stock unit net share settlement | 0.0 | | 0.0 | | | | | |
| Advances received under financing arrangements, net of repayments | 1.7 | | | | | | | |
| Refund of issuance costs of Series E preferred stock | 0.0 | | | | | | | |
| Net cash provided by financing activities | -3.0 | | 6.1 | | 3.0 | 3.0 | 10.9 | 28.6 |
| Net decrease in cash | -2.1 | | | | | | | |
| |
| Supplemental disclosure of cash flow information: | | | | | | | | |
| Interest paid | 0.1 | | 0.1 | | 0.0 | 0.0 | 0.1 | 0.3 |
| Taxes paid | 0.0 | | 0.0 | | 0.0 | | 0.0 | |
| Noncash investing and financing activities | | | | | | | | |
| Deferred offering costs in accounts payable and accrued liabilities | | | | | | | | |
| Accrued preferred stock issuance costs | | | | | | | | |
| Vesting of early exercised stock options | 0.0 | | 0.2 | | 0.3 | | 0.1 | |
| Right of use assets recorded upon adoption of ASC 842 | | | | | 5.2 | | | |
| Employee promissory notes issued for stock option exercises | | | | | | | | |
| Forgiveness of employee promissory notes issued for stock option exercises | | | | | | 0.0 | | |
| Forgiveness of Paycheck Protection Program | | | | | | | | |
| Issued shares of redeemable convertible preferred stock in connection with acquisitions | | | | | | | | |