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Common Stock (Details) - USD ($) |  |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | ---
Nov. 30, 2021 | May 04, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Mar. 31, 2022
Employee [Member] | Minimum [Member] |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Restricted shares, vesting period |  |  |  |  | 1 year |  |
Employee [Member] | Maximum [Member] |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Restricted shares, vesting period |  |  |  |  | 4 years |  |
Director [Member] |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Restricted shares, vesting period |  |  |  |  | 12 months |  |
Dividend Reinvestment Plan [Member] |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Shares authorized per plan |  |  | 330,750 |  | 330,750 |  |
2014 Restricted Stock Plan [Member] |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Aggregate shares granted |  |  |  |  | 200,000 |  |
Shares granted |  |  |  |  | 164,537 |  |
Allocated share-based compensation expense |  |  | $ 289,000 | $ 173,000 | $ 457,000 | $ 305,000 |
Shares forfeited and available for reissuance |  |  |  |  | 5,073 |  |
Restricted shares vested during period |  |  |  |  | 83,574 |  |
Granted shares unvested |  |  | 75,890 |  | 75,890 |  |
Underwritten Public Offering [Member] |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Common shares issued through follow-on public offering, shares |  | 2,990,000 |  |  |  |  |
Common stock, price per share |  | $ 25.00 |  |  |  |  |
Net proceeds received after underwriting discount and other estimated offering expenses |  | $ 70,238,000 |  |  |  |  |
Net proceeds of the offering |  | 4,512,000 |  |  |  |  |
Aggregate gross proceeds of offering |  | $ 74,750,000 |  |  |  | $ 70,238,000 |
Riverview [Member] |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Ratio of conversion of acquiree's shares to entity's shares | 48.33% |  |  |  |  |  |
Stock issued during period, shares | 4,519,776 |  |  |  |  |  |
Riverview [Member] | Underwritten Public Offering [Member] |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Stock issued during period, shares |  | 4,519,776 |  |  |  |  |
Treasury Stock Repurchase Program [Member] |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Stock repurchase program, authorized amount |  |  |  |  |  |  | $ 15,000,000
Percentage of issued shares based on closing stock price |  |  |  |  |  |  | 3.50%
Stock repurchased during period, shares |  |  | 103,912 |  | 202,364 |  |
Stock repurchased at average price per share |  |  | $ 26.88 |  | $ 23.31 |  |
Stock repurchase program, remaining available repurchase amount |  |  | $ 10,284,000 |  | $ 10,284,000 |  |

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