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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2024
Accounting Policies [Abstract]  
Schedule of Fair Value Assumptions These two types of inputs have created the following fair-value hierarchy:
Level 1:
Quoted prices for identical instruments in active markets;
Level 2:
Quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets; and
Level 3:
Valuations derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable.
The table below presents the fair value per warrant and the valuation assumptions under the Black-Scholes OPM:
December 31, 2024December 31, 2023
Fair value per share$7.15 $0.43 
Warrants outstanding7,732,168 7,732,168 
Exercise price$11.50 $11.50 
Common stock price$16.46 $2.85 
Expected option term1.67 years2.67 years
Expected volatility52.70 %74.20 %
Risk-free rate of return4.18 %4.00 %
Expected annual dividend yield— %— %
Schedule of Cash Equivalents and Restricted Stock
The following table provides a reconciliation of cash, cash equivalents and restricted cash reported on the consolidated balance sheets to the consolidated statements of cash flows for the following periods:

December 31, 2024December 31, 2023
Cash and cash equivalents
$33,712 $30,278 
Restricted cash(1)
15,359 — 
Total cash, cash equivalents and restricted cash
$49,071 $30,278 
(1) Amount includes $7.8 million of proceeds received from third-parties that is refundable except in certain limited circumstances and is also included as other current liabilities on the consolidated balance sheets.
Schedule of Supplemental Cash Flow Information
The table below presents supplemental cash flow information during the following periods:
Year Ended
December 31, 2024December 31, 2023
Supplemental cash flow information:
Cash paid (received) during the period for:
Interest
$12,159 $9,082 
Income taxes240 — 
Non-cash investing and financing activities:
Convertible Preferred Stock dividends paid-in-kind
$40,699 $19,741 
Capital expenditures not yet paid
2,069 1,321 
Schedule of Property, Plant and Equipment, net
Expected useful lives for property, plant and equipment are reviewed at least annually. Estimated useful lives are as follows:
Estimated useful life in years
Computer equipment
3
Furniture and fixtures
7
Laboratory equipment
3-10
Vehicles
5-7
Leasehold improvements
shorter of 5 or lease term
Assets subject to finance leaselease term
Property, plant and equipment, net were as follows:
 December 31, 2024December 31, 2023
United StatesEuropeTotalUnited StatesEuropeTotal
Computer equipment
$2,690 $695 $3,385 $1,755 $559 $2,314 
Furniture and fixtures
1,409 36 1,445 1,181 39 1,220 
Laboratory equipment
6,879 728 7,607 5,086 594 5,680 
Leasehold improvements
2,576 4,410 6,986 2,764 4,683 7,447 
Vehicles
81 — 81 — — — 
Finance lease ROU assets— 2,313 2,313 — 2,004 2,004 
Construction in process5,648 — 5,648 3,782 — 3,782 
Property, plant and equipment, gross19,283 8,182 27,465 14,568 7,879 22,447 
Less: accumulated depreciation
(6,147)(3,481)(9,628)(4,631)(1,907)(6,538)
Total property, plant and equipment, net$13,136 $4,701 $17,837 $9,937 $5,972 $15,909 
The table below presents the depreciation expense related to property, plant and equipment for the following periods:
Year Ended
 December 31, 2024December 31, 2023
Depreciation expense
$4,067 $3,512 
Schedule of Advertising Cost The table below presents the advertising cost for the following periods:
Year Ended
December 31, 2024December 31, 2023
Advertising costs$1,976 $1,199