Other Borrowings - Additional Information (Detail) - Other Borrowings - USD ($)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Other Borrowings [Line Items]
Note payable	$ 5,539,000	$ 5,539,000
Note payable interest rate	3.83%	3.83%
Note payable leverage loan term	20 years	20 years
Note payable leverage loan payments year	7 years	7 years

Carrying value as of the balance sheet date of notes payable (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_LongTermNotesPayable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant