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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Cash Flows from Operating Activities |  |  |
Net income | $ 52.2 | $ 175.0 | $ 54.4
Adjustments to reconcile net income (loss) to net cash (used in) operating activities: |  |  |
Depreciation and amortization | 9.6 | 8.6 | 7.3
Accrued loss on long-term contract | 19.5 | (7.2) | (10.6)
Increase (Decrease) in Deferred Income Taxes | (14.7) | 39.5 | 1.9
Retirement benefit plans (gains) losses, net | 7.8 | (50.5) | 7.2
Revaluation of inventory borrowing | 8.0 | 4.8 | 0.0
Equity Related Compensation | 1.9 | 12.1 | 7.1
Changes in operating assets and liabilities: |  |  |
Accounts receivable – (increase) decrease | (9.0) | 0.5 | (8.6)
Increase (Decrease) in Inventories | (88.5) | (14.2) | 26.6
Increase Decrease in Inventories Owed to Suppliers | 52.4 | 3.5 | (0.8)
Increase (Decrease) in Other Current Assets | (15.6) | (1.0) | (0.4)
Payables under SWU purchase agreements – increase (decrease) | 5.7 | 16.6 | 13.2
Deferred revenue, net of deferred costs – increase (decrease) | (22.5) | 13.2 | 9.7
Accounts payable and other liabilities – increase (decrease) | 2.6 | (4.6) | (5.2)
Pension and postretirement liabilities - increase (decrease) | (18.1) | (67.0) | (32.7)
Other, net | (0.1) | (0.3) | 1.8
Net cash used in operating activities | 20.6 | 50.0 | 67.1
Cash Flows Provided by Investing Activities |  |  |
Capital expenditures | (0.7) | (1.2) | (1.4)
Net Cash Provided by (Used in) Investing Activities | (0.7) | (1.2) | (1.4)
Cash Flows Used in Financing Activities |  |  |
Proceeds from the sale of common stock, net | (3.6) | (42.1) | (23.1)
Redemption of preferred stock, net | 0.0 | (44.4) | (61.6)
Repayments of Debt | (6.1) | (6.1) | (6.1)
Exercise of stock options | 0.4 | 0.9 | 0.3
Shares withheld for employee taxes | (1.9) | (2.4) | 0.0
Proceeds from (Payments for) Other Financing Activities | (0.3) | 0.0 | (0.1)
Net cash used in financing activities | (4.3) | (9.9) | (44.4)
Decrease in cash, cash equivalents and restricted cash | 15.6 | 38.9 | 21.3
Cash, cash equivalents and restricted cash, start of period | 196.8 | 157.9 | 136.6
Cash, cash equivalents and restricted cash, end of period | 212.4 | 196.8 | 157.9
Property, plant and equipment included in accounts payable and accrued liabilities |  |  |
Supplemental Cash Flow Information: |  |  |
Other Significant Noncash Transaction, Value of Consideration Given | 0.2 | 0.0 | 0.3
Other Significant Noncash Transaction, Value of Consideration Given | (0.2) | 0.0 | (0.3)
Equity issuance costs included in accounts payable and accrued liabilities [Member] |  |  |
Supplemental Cash Flow Information: |  |  |
Other Significant Noncash Transaction, Value of Consideration Given | 0.2 | 0.4 | 0.2
Other Significant Noncash Transaction, Value of Consideration Given | (0.2) | (0.4) | (0.2)
Disposal of right to use lease assets [Member] |  |  |
Supplemental Cash Flow Information: |  |  |
Other Significant Noncash Transaction, Value of Consideration Given | 0.0 | 1.0 | 0.2
Other Significant Noncash Transaction, Value of Consideration Given | 0.0 | (1.0) | (0.2)
Reclassification of equity compensation liability to equity [Member] |  |  |
Supplemental Cash Flow Information: |  |  |
Other Significant Noncash Transaction, Value of Consideration Given | 10.6 | 7.5 | 0.0
Other Significant Noncash Transaction, Value of Consideration Given | (10.6) | (7.5) | 0.0
Common stock and warrant issued in exchange for preferred stock [Member] |  |  |
Supplemental Cash Flow Information: |  |  |
Other Significant Noncash Transaction, Value of Consideration Given | 0.0 | 7.5 | 0.0
Other Significant Noncash Transaction, Value of Consideration Given | 0.0 | (7.5) | 0.0
Adjustment to Right of Use Lease due to Modification [Domain] |  |  |
Supplemental Cash Flow Information: |  |  |
Other Significant Noncash Transaction, Value of Consideration Given | 6.6 | 0.0 | 0.0
Other Significant Noncash Transaction, Value of Consideration Given | (6.6) | 0.0 | 0.0
Distributed Earnings Allocable to Warrant Modification [Domain] |  |  |
Supplemental Cash Flow Information: |  |  |
Other Significant Noncash Transaction, Value of Consideration Given | 1.5 | 0.0 | 0.0
Other Significant Noncash Transaction, Value of Consideration Given | $ (1.5) | $ 0.0 | $ 0.0

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