Leases - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Lessee Lease Description [Line Items]
Operating lease, existence of option to extend	true
Right-of-use lease assets in exchange for operating lease liabilities	$ 188,000
Lease obligation payable	422,000
Rent expense under operating leases	$ 611,000	$ 564,000
Other accrued expenses		$ 129,000
Minimum [Member]
Lessee Lease Description [Line Items]
Operating lease renewal term	1 year
Maximum [Member]
Lessee Lease Description [Line Items]
Operating lease renewal term	10 years