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Leases - Schedule of Lease Cost Recognized in Consolidated Statement of Operations and Other Information (Detail)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2020
USD ($)
Sep. 30, 2020
USD ($)
Lease Cost [Abstract]    
Operating lease cost $ 463 $ 1,265
Short-term operating lease cost   46 [1]
Total operating lease cost $ 463 [2] $ 1,311 [2]
Other information:    
Weighted-average remaining lease term - operating leases 2 years 10 months 24 days 2 years 10 months 24 days
Weighted-average discount rate - operating leases 4.90% 4.90%
[1] The Company elected the practical expedient permitted in ASC Topic 842. As such, its short-term prior operating lease in Wichita, Kansas was not recognized as a liability on the Company’s balance sheet as of September 30, 2020. The Company has recognized short-term operating lease costs on a straight-line basis. As of September 30, 2020, the Company no longer has any short-term operating leases.
[2]

The discount rate used to compute the present value of total lease liabilities as of September 30, 2020 was based on the Company's estimated incremental borrowing rate of similar secured borrowings available to the Company as of the commencement date of lease or implementation date of ASC 842 on January 1, 2019.