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