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Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Deferred tax assets: |  |
Accounts receivable | $ 177 | $ 149
Inventory | 449 | 100
Accrued expenses | 1,063 | 309
NOL carryforwards | 32,197 | 28,722
Interest limitation imposed by the TJCA | 10,667 | 9,022
Stock Compensation | 5,813 | 5,003
Other | 2,408 | 2,122
Sale of Future Revenue | 17,139 | 16,595
Property and equipment | 2,576 | 2,566
Orphan Drug and R&D Tax Credits | 5,625 | 5,490
Accrued debt fees | 697 | 726
Intangible assets | 1,731 | 2,547
Section 174 R&D Capitalization | 3,770 | 0
Deferred tax assets | 84,312 | 73,351
Deferred tax liabilities: |  |
481(a) adjustment | 0 | (14)
Prepaid expenses | (524) | (807)
Deferred tax liabilities | (524) | (821)
Valuation Allowance | (83,788) | (72,530)
Net deferred tax asset/(liability) | $ 0 | $ 0

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