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Rental Income
9 Months Ended
Sep. 30, 2021
Leases [Abstract]  
Rental Income
7.
Rental Income
Income,
 net under the Company’s operating lease agreement, for its owned facility leased to a third party in California, was approximately $
198,000
and $
594,000
for the three and nine months ended September 30, 2021 and 2020, respectively.