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Note 17 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Inventory costing and valuation methods | $ 4.5 | $ 4.6
Employee wages and benefits, principally due to accruals for financial reporting purposes | 14.0 | 13.7
Warranty reserves accrued for financial reporting purposes | 2.3 | 2.5
Receivables, principally due to allowance for doubtful accounts and tax accounting method for equipment rentals | 2.3 | 1.9
Operating lease liability | 11.2 | 11.4
Tax loss carryforwards | 9.6 | 6.6
Tax credit carryforwards | 3.6 | 3.2
Other | 2.5 | 3.2
Gross Deferred Tax Assets | 50.0 | 47.1
Less: valuation allowance | (7.5) | (6.2)
Total Net Deferred Tax Assets | 42.5 | 40.9
Lease right of use assets | 11.2 | 11.4
Property, Plant and Equipment, principally due to differences in depreciation and related gains | 14.0 | 10.2
Goodwill and Intangible Assets | 41.5 | 43.4
Total Deferred Tax Liabilities | 66.7 | 65.0
Net Deferred Tax Liabilities | $ (24.2) | $ (24.1)

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