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Accrued Liabilities
 9 Months Ended
Sep. 30, 2020
Accrued Liabilities [Abstract]  
Accrued Liabilities Accrued Liabilities
Accrued liabilities as of September 30, 2020 and December 31, 2019 were as follows (in thousands):
September 30, 2020December 31, 2019
Salaries, employee benefits and related taxes$1,784 $1,834 
Operating lease liabilities -- current359 354 
CIRM upfront funding -- current— 1,600 
Other933 698 
Total$3,076 $4,486