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Income Taxes - Deferred Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Deferred tax assets:    
Inventory valuation $ 11,931 $ 11,822
Net operating losses 5,647 38,816
Credit carry forwards 59,988 57,810
Warranty and installation accruals 1,862 1,730
Share-based compensation 5,267 4,033
Customer deposits and deferred revenue 24,504 9,908
Operating leases 8,349 8,464
Research and experimental ("R&E") capitalization 19,071  
Other 6,553 5,880
Total deferred tax assets 143,172 138,463
Valuation allowance (11,083) (116,054)
Net deferred tax assets 132,089 22,409
Deferred tax liabilities:    
Purchased intangible assets 8,724 6,633
Convertible Senior Notes (39) 10,018
Operating leases 5,994 6,539
Depreciation 2,346 2,372
Total deferred tax liabilities 17,025 25,562
Net deferred taxes, asset 115,064  
Net deferred taxes, liability   $ (3,153)
Accrual for foreign tax withholdings on unremitted earnings 900  
Valuation allowance    
Increase (decrease) in valuation allowance $ (104,900)