Other Income and Other Expense - Major Income Classifications Included in Other Income Under Non Interest Income on Income Statement (Detail) - USD ($) |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
Component Of Other Expense Income Nonoperating [Line Items] | |||
Other income | $ 1,147,561 | $ 1,314,964 | $ 1,348,916 |
BOLI Insurance [Member] | |||
Component Of Other Expense Income Nonoperating [Line Items] | |||
Other income | 495,290 | 528,425 | 511,854 |
Mortgage Loan Origination Income [Member] | |||
Component Of Other Expense Income Nonoperating [Line Items] | |||
Other income | 362,712 | 340,395 | 451,476 |
Other Income [Member] | |||
Component Of Other Expense Income Nonoperating [Line Items] | |||
Other income | $ 289,559 | $ 446,144 | $ 385,586 |