v3.20.4

Income taxes - Deferred tax assets and liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | --- | ---
Deferred tax assets: |  |  |  |
Net operating loss carryforwards | $ 46,998 | $ 44,565 |  |
Outside basis differences for U.S. partnerships | 7,941 | 8,656 |  |
Operating lease liabilities | 4,076 | 4,695 |  |
Deferred revenue | 800 | 782 |  |
Deferred compensation | 86 | 623 |  |
State taxes | 39 | 44 |  |
Stock options | 0 | 0 |  |
Other | 2,099 | 939 |  |
Valuation allowance | (46,459) | (41,646) | $ (33,810) | $ (34,990)
Net deferred tax assets | 15,580 | 18,658 |  |
Deferred tax liabilities: |  |  |  |
Property and equipment | (5,729) | (6,943) |  |
Convertible Notes | (3,403) | (4,366) |  |
Operating lease right-of-use assets | (2,888) | (3,348) |  |
Intangible assets | (3,106) | (3,079) |  |
Stock options | (1,438) | (1,915) |  |
Net deferred tax liabilities | (16,564) | (19,651) |  |
Net deferred taxes | $ (984) | $ (993) |  |

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