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INCOME TAXES - Components of our deferred tax assets and liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Deferred tax assets:    
Accrued and reserves $ 4,008 $ 4,231
Inventory 10,554 15,181
Tax credits 12,953 10,880
Lease Liability 16,262 14,800
Net operating loss 205,995 149,141
Total gross deferred tax assets 249,772 194,233
Depreciation and amortization (2,746) (4,749)
Goodwill (290) (114)
Lease ROU Asset (11,562) (14,507)
Valuation allowance $ (235,174) $ (174,863)