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Share-Based Payments (Tables)
9 Months Ended
Sep. 30, 2022
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 
 September 30,
Nine Months Ended 
 September 30,
2022202120222021
Cost of products$$$22 $23 
Cost of services15 25 63 103 
Research and development524 549 1,658 2,159 
Selling, general and administrative1,638 1,840 6,244 8,905 
Discontinued operations(59)68 272 
Total$2,125 $2,490 $7,996 $11,462 
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, 202112,260,187 $14.06 6.79
Granted4,322,890 2.23 
Exercised(375)2.28 
Forfeited(544,928)5.21 
Expired(720,588)23.44 
Balances at September 30, 202215,317,186 10.60 7.28
Exercisable at September 30, 20228,715,518 13.77 5.84
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, 2021468,481 $8.47 0.33
Granted1,387,831 2.12 
Vested(1,125,785)4.29 
Forfeited(32,712)7.26 
Balances at September 30, 2022697,815 2.66 0.38