| In millions, except per share items | Mar-31-23 | Dec-31-22 | 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-K | 10-Q | 10-Q | 10-Q | 10-K |
| Operating activities | | | | | | | | |
| Net loss | -4.8 | -4.9 | -4.7 | -5.4 | -9.0 | -7.0 | -6.0 | -4.0 |
| |
| Adjustments to reconcile net loss to net cash used in operating activities: | | | | | | | | |
| Share-based compensation | 7.0 | 6.9 | 6.6 | 6.2 | 5.6 | 5.1 | 4.5 | 3.6 |
| Depreciation and amortization | 1.2 | 1.1 | 0.9 | | 0.7 | 0.7 | 0.7 | |
| Amortization of purchased intangible assets | 5.8 | 5.9 | 5.8 | 5.6 | 4.7 | 4.0 | 3.4 | 3.1 |
| Amortization of manufacturing profit in acquired inventory associated with acquisitions | 0.2 | 0.1 | 0.2 | | | 0.4 | 0.2 | |
| Loss on disposal of property and equipment | | | 0.0 | 0.0 | | 0.2 | | 0.2 |
| Amortization of deferred debt issuance costs | 0.1 | 0.1 | 0.2 | 0.3 | 0.2 | 0.2 | 0.1 | 0.0 |
| Non-cash loss on extinguishment of debt | | | | | 0.8 | | | |
| Changes in operating assets and liabilities, net of assets and liabilities acquired: | | | | | | | | |
| Accounts receivable | -0.4 | -1.8 | -2.9 | -7.5 | -6.4 | -5.4 | -4.3 | -2.1 |
| Inventories | -15.2 | -16.4 | -15.4 | -15.3 | -10.6 | -7.8 | -5.0 | -1.3 |
| Prepaid expenses and other current assets | 0.8 | -0.4 | -0.7 | -2.2 | -1.3 | -1.0 | -1.5 | -1.6 |
| Lease right-of-use assets | 1.7 | 1.6 | 1.4 | 1.6 | 1.6 | 1.6 | 1.6 | 1.5 |
| Other assets | 0.0 | -0.2 | -0.1 | -0.1 | -0.1 | 0.0 | 0.0 | 0.0 |
| Accounts payable | -1.3 | 2.1 | -1.8 | 8.8 | 6.4 | 3.9 | 6.7 | 3.6 |
| Accrued payroll and related expenses | -0.9 | -2.2 | 0.0 | -0.2 | 1.3 | 2.8 | 1.5 | 2.3 |
| Other liabilities | 3.4 | -5.1 | -5.3 | -3.1 | -0.5 | -0.3 | 1.4 | -0.2 |
| Net cash used in operating activities | -4.3 | -14.0 | -13.6 | -9.4 | -4.3 | -2.2 | 3.0 | 4.3 |
| |
| Investing activities | | | | | | | | |
| Purchases of property and equipment | -3.3 | -3.6 | -3.0 | -2.1 | -1.3 | -1.1 | -0.8 | -0.8 |
| Cash payment for acquisitions, net of cash and cash equivalents acquired | | | -4.3 | | | -23.6 | -24.0 | |
| Net cash used in investing activities | -8.0 | -8.2 | -7.3 | -25.7 | -24.9 | -24.7 | -24.8 | -0.8 |
| |
| Financing activities | | | | | | | | |
| Net proceeds from issuances of common stock | 1.6 | 1.7 | 34.0 | 34.2 | 33.7 | 33.7 | 1.0 | 0.9 |
| Tax withholding paid on behalf of employees for restricted shares | -0.8 | -0.7 | -1.9 | -1.8 | | -1.9 | -0.6 | -0.9 |
| Net proceeds from issuance of debt | | | 4.9 | | | 28.8 | 28.8 | |
| Payment of borrowings on term loan | -1.9 | -13.8 | -13.8 | -17.1 | -17.0 | -5.7 | | |
| Net proceeds from borrowing on line of credit | | | 4.5 | | 2.5 | | | |
| Payment of borrowings on line of credit | -2.0 | | | | -2.5 | | | |
| Net proceeds from public offering | 1.6 | 1.7 | 34.0 | 34.2 | 33.7 | 33.7 | 1.0 | 0.9 |
| Payment of lease liabilities | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Net cash provided by financing activities | 2.3 | -7.4 | 23.7 | 42.6 | 43.7 | 55.6 | 24.4 | -1.5 |
| Increase (decrease) in cash and cash equivalents | -4.4 | -24.0 | 8.4 | | 13.0 | 26.6 | 0.5 | |