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Leases - Schedule of Lease Cost Recognized in Consolidated Statement of Operations and Other Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Lease Cost [Abstract]    
Operating lease cost $ 471 $ 420
Short-term operating lease cost [1]   30
Total operating lease cost [2] $ 471 $ 450
Other information:    
Weighted-average remaining lease term - operating leases 2 years 7 months 6 days 4 years 10 months 24 days
Weighted-average discount rate - operating leases 4.80% 5.00%
[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 December 31, 2020. The Company has recognized short-term operating lease costs on a straight-line basis. As of March 31, 2021, 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 March 31, 2021 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.