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Paycheck Protection Program Promissory Note - Additional Information (Details) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
May 31, 2020
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Interest expense   $ 14,000 $ 72,000 $ 54,000 $ 186,000
PPP Promissory Note [Member] | CARES Act [Member]          
Paycheck protection program, amount $ 2,000,000        
Interest rate 1.00%        
Payments due, beginning date Nov. 01, 2020        
Payments due, ending date May 03, 2022        
Interest expense   $ 5,000   $ 8,000  
Deferral period for all loans       10 months  
Debt instrument, description       payments are due beginning August 2021 and the principal amount along with unpaid interest is due in May 2022. The Company has requested from its lender an extension of the loan maturity from two years to five years as permitted under the PPPFA. The principal and interest may be forgiven if the proceeds are used for forgivable purposes as defined by the terms in the PPP Promissory Note, and the Company believes it has used the proceeds from the PPP Promissory Note for forgivable purposes as defined by the terms of the PPP Promissory Note.  
PPP Promissory Note [Member] | CARES Act [Member] | Minimum [Member]          
Extended maturity period       2 years  
PPP Promissory Note [Member] | CARES Act [Member] | Maximum [Member]          
Extended maturity period       5 years