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Share-Based Payments (Tables)
 6 Months Ended
Jun. 30, 2024
Share-Based Payment Arrangement [Abstract]  
Schedule of Stock-Based Compensation Costs Stock-based compensation costs included in the condensed consolidated statements of operations are presented below:
Three Months Ended 
 June 30,		Six Months Ended 
 June 30,
2024202320242023
Cost of products and services$(5)$17 $12 $35 
Research and development920 582 1,454 1,087 
Selling, general and administrative1,049 1,589 3,079 4,198 
Total$1,964 $2,188 $4,545 $5,320 
Schedule of Stock Option Activity
Stock option activity was as follows:
Number of SharesWeighted Average Exercise PriceWeighted Average Remaining Contractual Term (Years)
Balances at December 31, 202322,057,340 $6.90 7.47
Granted6,852,634 1.41 
Exercised(36,458)1.42 
Forfeited(611,750)1.51 
Expired(857,997)16.23 
Balances at June 30, 202427,403,769 5.36 7.47
Exercisable at June 30, 202415,595,522 8.17 6.20
Schedule of Restricted Stock Unit Activity
RSU activity was as follows:
Number of Restricted Stock UnitsWeighted Average Grant Date Fair ValueWeighted Average Remaining Contractual Term (Years)
Balances at December 31, 2023961,534 $1.17 0.19
Granted4,464,724 1.42 
Vested(4,639,549)1.37 
Forfeited— — 
Balances at June 30, 2024786,709 1.43 0.62