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Borrowings and Other Obligations - Schedule of Borrowings (Details) - USD ($) $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Aug. 25, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Aug. 06, 2021
Debt Instrument [Line Items] |  |  |  |  |
FHLB fixed-rate advances, Carrying Value |  | $ 0 | $ 0 | $ 0 |
Subordinated debenture, Carrying Value |  | 0 | 2,777 |  |
FHLB fixed-rate advances, Average Balance |  | $ 642 | $ 0 | $ 0 |
FHLB fixed-rate advances, Average Rate |  | 1.18% | 0.00% | 0.00% |
Other obligations (finance leases) |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Other Obligations Carrying Value |  | $ 419 | $ 58 | $ 212 |
Other Obligations Average Balance |  | $ 250 | $ 132 | $ 279 |
Borrowings, Average Rate |  | 0.71% | 2.62% | 2.85% |
Subordinated debenture |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Subordinated debenture, Carrying Value |  | $ 0 | $ 2,777 | $ 2,708 |
Subordinated debenture, Average Balance |  | $ 534 | $ 2,741 | $ 2,673 |
Borrowings, Average Rate |  | 251.54% | 5.68% | 8.44% |
Line of Credit | American River Bank ARB | Federal Home Loan Bank Borrowings |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Lines of credit |  |  |  |  | $ 13,900
Repayments of lines of credit | $ 13,900 |  |  |  |
Federal Home Loan Bank Borrowings | Line of Credit |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
FHLB overnight borrowings and advances, Carrying Value |  | $ 0 | $ 0 | $ 0 |
FHLB overnight borrowings and advances, Average Balance |  | $ 0 | $ 42 | $ 2,656 |
Borrowings, Average Rate |  | 0.00% | 0.75% | 2.55% |

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- Definition Federal Home Loan Bank, Advances, Average Balance, Fixed Rate + References No definition available. + Details
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- Definition Other Obligations Average Balance + References No definition available. + Details
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- Definition Other Obligations Carrying Value + References No definition available. + Details
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- Definition Subordinated Debt, Average Outstanding Amount + References No definition available. + Details
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- Definition Par amount of advances made and reported by Federal Home Loan Bank (FHLBank) with fixed interest rate. + References No definition available. + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References 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=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. + References 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of subordinated debt (with initial maturities beyond one year or beyond the operating cycle if longer). Subordinated debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets. + References 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(19)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 4: 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=120391452&loc=d3e13212-122682 + Details
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