In millions, except per share items | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 | Dec-31-14 |
| 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
Cash flows from operating activities: | | | | | | | | |
Net loss | -101.9 | -12.1 | -2.7 | -3.7 | -9.8 | -2.6 | -13.0 | 0.0 |
Adjustments to reconcile net loss to net cash used in operating activities: | | | | | | | | |
Depreciation expense | 0.0 | 0.0 | | | 0.0 | 0.1 | 0.1 | 0.2 |
Amortization expense | 0.2 | | | | | | | |
Noncash interest expense | 0.0 | | | | | | | |
Stock based compensation | 6.1 | 2.7 | | | | 0.0 | 0.1 | 0.5 |
Noncash lease expense | 0.0 | 0.0 | | | | | | |
Changes in operating assets and liabilities: | | | | | | | | |
Other current assets | 0.9 | -0.3 | | | | 0.2 | -0.3 | 0.0 |
Accounts receivable | -0.4 | | | | -0.1 | 0.3 | -0.4 | 0.6 |
Short term investments | | | | | | | | |
Prepaid expenses | -1.0 | | | | | | | |
Contract asset | -0.1 | | | | | | | |
Contract liability | -0.1 | | | | | | | |
Accounts payable and accrued expenses | 1.0 | 0.3 | 0.2 | -0.3 | -1.0 | 0.3 | -0.6 | 0.7 |
Net cash used in operating activities | -28.2 | -5.1 | -2.7 | -4.6 | -6.6 | -5.0 | -12.1 | -14.5 |
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Cash flows from investing activities: | | | | | | | | |
Purchase of property and equipment | -0.2 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
Cash acquired, acquisition | | | | | | | | |
Net cash provided by (used in) investing activities | 13.5 | 0.0 | 0.2 | 4.0 | 3.9 | 5.7 | -10.3 | -1.8 |
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Cash flows from financing activities: | | | | | | | | |
Proceeds from issuance of common | 7.3 | | | | | | 27.2 | 9.7 |
Payment of debt issuance costs | -0.3 | | | | | | | |
Stock issuances due | 0.3 | | | | | | | |
Repayments on notes payable | -0.9 | | | | | | -2.7 | -4.2 |
Net cash provided by (used in) financing activities | 21.0 | 5.7 | | 0.1 | | 0.5 | 24.9 | 10.6 |
Effect of exchange rate change on cash and equivalents | 0.0 | | | | | | | |
Increase (decrease) in cash and cash equivalents | 6.3 | 0.6 | | | | | | |
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SUPPLEMENTAL CASH FLOW INFORMATION: | | | | | | | | |
Cash paid for interest | 1.3 | | | | | | 0.5 | 0.5 |
NON-CASH INVESTING AND FINANCING ACTIVITIES: | | | | | | | | |
Right of use asset exchanged for lease liability | 0.2 | | | | | | | |
Debt principal converted | | | | | | | | |