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Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Jan. 01, 2020
Dec. 31, 2019
Deferred tax assets:        
Net operating losses $ 38,746 $ 25,990    
Foreign tax credits 8,330 6,690    
Accruals not currently deductible 4,393 5,121    
Unrealized foreign exchange losses, net 4,590 3,750    
Stock-based compensation 1,856 2,238    
Capitalized inventory costs 1,706 3,111    
Other 10,534 9,456    
Total deferred tax assets 70,155 56,356    
Valuation allowance (38,406) (26,250)    
Total deferred tax assets, net of allowances 31,749 30,106    
Deferred tax liabilities:        
Accelerated depreciation and amortization (31,816) (29,587)    
Tax on unremitted earnings (8,214) (9,765)    
Original issue discount on Convertible Notes 0 (804)    
Other (1,222) (1,612)    
Total deferred tax liabilities (41,252) (41,768)    
Net deferred tax liabilities (9,503) (11,662)    
Noncurrent deferred tax assets 2,316 1,706 $ 3,659 $ 3,600
Noncurrent deferred tax liabilities $ (11,819) $ (13,368) $ (34,082) $ (34,247)