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v3.20.4

Income Taxes - Deferred Taxes (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Deferred tax assets: |  |
Net operating loss carryforwards | $ 31,302 | $ 30,275
Amortization | 3,701 | 11,602
Stock based compensation | 2,626 | 3,577
Accounts receivable | 0 | 53
Fair value contingent consideration | 0 | 264
Orphan drug and R&D tax credit | 2,793 | 0
Other | 423 | 901
Gross deferred tax assets | 40,845 | 46,672
Deferred tax liabilities: |  |
Amortization | 0 | (172)
Prepaid expenses | (75) | (35)
Other | (890) | 0
Gross deferred tax liabilities | (965) | (207)
Less: valuation allowances | (21,624) | (17,038)
Net deferred tax assets | $ 18,256 | $ 29,427

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