Plumas Bancorp (PLBC) 10-Q 2 May 18 2018 Q1 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	3 Months Ended
	Mar. 31, 2018	Apr. 27, 2018
Document Information [Line Items]
Entity Registrant Name	Plumas Bancorp
Entity Central Index Key	1,168,455
Trading Symbol	plbc
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Entity Common Stock, Shares Outstanding (in shares)		5,107,076
Document Type	10-Q
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1
Amendment Flag	false

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Assets
Cash and cash equivalents	$ 64,690	$ 87,537
Investment securities available for sale	148,180	137,466
Loans, less allowance for loan losses of $6,622 at March 31, 2018 and $6,669 at December 31, 2017	485,171	482,248
Real estate acquired through foreclosure	1,081	1,344
Premises and equipment, net	11,175	11,346
Bank owned life insurance	12,611	12,866
Accrued interest receivable and other assets	13,868	12,620
Total assets	736,776	745,427
Deposits:
Non-interest bearing	267,636	282,239
Interest bearing	385,155	380,418
Total deposits	652,791	662,657
Repurchase agreements	8,675	10,074
Accrued interest payable and other liabilities	7,709	6,686
Junior subordinated deferrable interest debentures	10,310	10,310
Total liabilities	679,485	689,727
Commitments and contingencies (Note 5)
Shareholders’ equity:
Common stock, no par value; 22,500,000 shares authorized; issued and outstanding – 5,082,676 shares at March 31, 2018 and 5,064,972 at December 31, 2017	6,544	6,415
Retained earnings	53,135	49,855
Accumulated other comprehensive loss, net	(2,388)	(570)
Total shareholders’ equity	57,291	55,700
Total liabilities and shareholders’ equity	$ 736,776	$ 745,427

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ / shares in Thousands, $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Loans, allowance for loan losses	$ 6,622	$ 6,669
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized (in shares)	22,500,000	22,500,000
Preferred stock, shares outstanding (in shares)	5,082,676	5,064,972
Common stock, shares issued (in shares)	5,082,676	5,064,972

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Interest Income:
Interest and fees on loans	$ 6,777	$ 6,108
Interest on investment securities	856	561
Other	185	96
Total interest income	7,818	6,765
Interest Expense:
Interest on deposits	151	139
Interest on note payable		24
Interest on junior subordinated deferrable interest debentures	112	94
Other	2	1
Total interest expense	265	258
Net interest income before provision for loan losses	7,553	6,507
Provision for Loan Losses	200	200
Net interest income after provision for loan losses	7,353	6,307
Non-Interest Income:
Service charges	640	599
Interchange revenue	491	456
Gain on sale of loans	666	528
Gain on equity securities with no readily determinable fair value	209
Loss on sale of investments	(8)	(17)
Other	533	481
Total non-interest income	2,531	2,047
Non-Interest Expenses:
Salaries and employee benefits	3,113	2,927
Occupancy and equipment	702	769
Other	1,634	1,387
Total non-interest expenses	5,449	5,083
Income before provision for income taxes	4,435	3,271
Provision for Income Taxes	1,155	1,207
Net income	$ 3,280	$ 2,064
Basic earnings per common share (in dollars per share)	$ 0.65	$ 0.42
Diluted earnings per common share (in dollars per share)	$ 0.63	$ 0.40

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Net income	$ 3,280	$ 2,064
Other comprehensive income:
Change in net unrealized gain/loss	(2,589)	503
Reclassification adjustments for net losses included in net income	8	17
Net unrealized holding (loss) gain	(2,581)	520
Related tax effect:
Change in net unrealized gain/loss	765	(207)
Reclassification of net losses included in net income	(2)	(7)
Income tax effect	763	(214)
Other comprehensive (loss) income	(1,818)	306
Total comprehensive income	$ 1,462	$ 2,370

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash Flows from Operating Activities:
Net income	$ 3,280,000	$ 2,064,000
Adjustments to reconcile net income to net cash provided by (used in) provided by operating activities:
Provision for Loan Losses	200,000	200,000
Change in deferred loan origination costs/fees, net	(315,000)	(134,000)
Depreciation and amortization	245,000	271,000
Stock-based compensation expense	47,000	43,000
Loss on sale of investments	8,000	17,000
Amortization of investment security premiums	169,000	144,000
Gain on equity securities with no readily determinable fair value	(209,000)
Gain on sale of OREO and other vehicles	(34,000)	(5,000)
Gain on sale of loans held for sale	(666,000)	(528,000)
Loans originated for sale	(12,612,000)	(11,202,000)
Proceeds from loan sales	11,939,000	9,198,000
Provision from change in OREO valuation		9,000
Earnings on bank-owned life insurance	(83,000)	(82,000)
(Increase) decrease in accrued interest receivable and other assets	(99,000)	1,453,000
Increase (decrease) in accrued interest payable and other liabilities	1,023,000	(1,473,000)
Net cash provided by (used in) operating activities	2,893,000	(25,000)
Cash Flows from Investing Activities:
Proceeds from principal repayments from available-for-sale government-sponsored mortgage-backed securities	3,159,000	3,096,000
Purchases of available-for-sale securities	(20,788,000)	(16,291,000)
Proceeds from sale of available-for-sale securities	4,157,000	4,221,000
Net increase in loans	(1,896,000)	(6,405,000)
Proceeds from Bank owned life insurance	338,000
Proceeds from sale of OREO	412,000	75,000
Proceeds from sale of other vehicles	112,000	66,000
Purchase of premises and equipment	(51,000)	(118,000)
Net cash used in investing activities	(14,557,000)	(15,356,000)
Cash Flows from Financing Activities:
Net (decrease) increase in demand, interest bearing and savings deposits	(6,263,000)	8,531,000
Net decrease in time deposits	(3,603,000)	(1,591,000)
Principal payment on note payable		(125,000)
Net decrease in securities sold under agreements to repurchase	(1,399,000)	(2,249,000)
Proceeds from exercise of stock options	82,000	123,000
Net cash (used in) provided by financing activities	(11,183,000)	4,689,000
Decrease in cash and cash equivalents	(22,847,000)	(10,692,000)
Cash and Cash Equivalents at Beginning of Year	87,537,000	62,646,000
Cash and Cash Equivalents at End of Period	64,690,000	51,954,000
Supplemental Disclosure of Cash Flow Information:
Interest expense	264,000	256,000
Income taxes
Non-Cash Investing Activities:
Real estate and vehicles acquired through foreclosure	$ 220,000	$ 50,000

Note 1 - The Business of Plumas

Note 1 - The Business of Plumas Bancorp	3 Months Ended
	Mar. 31, 2018
Notes to Financial Statements
Nature of Operations [Text Block]	1. THE BUSINESS OF PLUMAS BANCORP During 2002, one September 26, 2002. September 28, 2005. The Bank operates eleven December, 2015 first

Note 2 - Summary of Significant

Note 2 - Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2018
Notes to Financial Statements
Significant Accounting Policies [Text Block]	2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Consolidation and Basis of Presentation The condensed consolidated financial statements include the accounts of the Company and the accounts of its wholly-owned subsidiary, Plumas Bank. Plumas Statutory Trust I and Plumas Statutory Trust II are not March 31, 2018 three March 31, 2018 2017. December 31, 2017 The unaudited condensed consolidated financial statements of the Company have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) for interim reporting on Form 10 not 2017 10 three March 31, 2018 may not Management has determined that because all of the commercial banking products and services offered by the Company are available in each branch of the Bank, all branches are located within the same economic environment and management does not No 10% Reclassifications Certain reclassifications have been made to prior years’ balances to conform to the classifications used in 2017. no Segment Information Management has determined that since all of the banking products and services offered by the Company are available in each branch of the Bank, all branches are located within the same economic environment and management does not No 10 Revenue from Contracts with Customers The Company records revenue from contracts with customers in accordance with Accounting Standards Codification Topic 606, 606” 606, not Most of our revenue-generating transactions are not 606, not 606 Income Taxes On December 22, 2017, 1986, 35% 21% 21%. 2017 $1.4 no three March 31, 2018. Recently Adopted Accounting Pronouncements In February 2018, 2018 02, 2018 02 December 22, 2017, 2017 $94,000. In May 2014, No. 2014 09 No. 2014 09” January 1, 2018. 2014 09 not not 2014 09. 2014 09, not not 2014 09 not not On January 5, 2016, 2016 01, December 15, 2017, No. 2016 01 January 1, 2018 $209,000 $662,000 not Pending Accounting Pronouncements On February 25, 2016, 2016 02, not 12 2016 02 December 15, 2018. two not No. 2016 02. No. 2016 02 not In June 2016, No. 2016 13, No. 2016 13 1 2 not not No. 2016 13 No. 2016 13 December 15, 2019; December 15, 2018. first No. 2016 13 On March 30, 2017, 2017 08, not 2017 08 December 15, 2018. first No. 2017 08. No. 2017 08 not

Note 3 - Investment Securities

Note 3 - Investment Securities Available for Sale	3 Months Ended
	Mar. 31, 2018
Notes to Financial Statements
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]	3. The amortized cost and estimated fair value of investment securities at March 31, 2018 December 31, 2017 Available-for-Sale March 31, 2018 Gross Gross Amortized Unrealized Unrealized Fair Cost Gains Losses Value Debt securities: U.S. Government-sponsored agencies collateralized by mortgage obligations- residential $ 119,337 $ 32 $ (2,899 ) $ 116,470 Obligations of states and political subdivisions 32,233 92 (615 ) 31,710 $ 151,570 $ 124 $ (3,514 ) $ 148,180 Net unrealized loss on available-for-sale investment securities totaling $3,390,000 $1,002,000 March 31, 2018. three March 31, 2018 eighteen $4,157,000 $8,000 eight $4,000 ten $12,000. Available-for-Sale December 31, 2017 Gross Gross Amortized Unrealized Unrealized Fair Cost Gains Losses Value Debt securities: U.S. Government-sponsored agencies collateralized by mortgage obligations- residential $ 104,935 $ 26 $ (1,173 ) $ 103,788 Obligations of states and political subdivisions 33,340 482 (144 ) 33,678 $ 138,275 $ 508 $ (1,317 ) $ 137,466 Unrealized loss on available-for-sale investment securities totaling $809,000 $239,000 December 31, 2017. three March 31, 2017 seven $4,221,000 $17,000 four $4,000 three $21,000. There were no three March 31, 2018 twelve December 31, 2017. no March 31, 2018 December 31, 2017. Investment securities with unrealized losses at March 31, 2018 December 31, 2017 March 31, 2018 Less than 12 Months 12 Months or More Total Fair Unrealized Fair Unrealized Fair Unrealized Value Losses Value Losses Value Losses Debt securities: U.S.Government-sponsored agencies collateralized by mortgage obligations-residential $ 72,580 $ 1,632 $ 29,541 $ 1,267 $ 102,121 $ 2,899 Obligations of states and political subdivisions 20,184 376 3,276 239 23,460 615 $ 92,764 $ 2,008 $ 32,817 $ 1,506 $ 125,581 $ 3,514 December 31, 2017 Less than 12 Months 12 Months or More Total Fair Unrealized Fair Unrealized Fair Unrealized Value Losses Value Losses Value Losses Debt securities: U.S.Government-sponsored agencies collateralized by mortgage obligations-residential $ 60,070 $ 441 $ 31,213 $ 732 $ 91,283 $ 1,173 Obligations of states and political subdivisions 2,621 31 3,403 113 6,024 144 $ 62,691 $ 472 $ 34,616 $ 845 $ 97,307 $ 1,317 At March 31, 2018, 187 152 116 twelve 187 83 104 March 31, 2018, not not not March 31, 2018 The amortized cost and estimated fair value of investment securities at March 31, 2018 Amortized Cost Estimated Fair Value Within one year $ - $ - After one year through five years 2,937 2,938 After five years through ten years 16,910 16,682 After ten years 12,386 12,090 Investment securities not due at a single maturity date: Government-sponsored mortgage-backed securities 119,337 116,470 $ 151,570 $ 148,180 Expected maturities will differ from contractual maturities because the issuers of the securities may Investment securities with amortized costs totaling $78,613,000 $82,059,000 $76,216,000 $81,006,000 March 31, 2018 December 31, 2017,

Note 4 - Loans and the Allowanc

Note 4 - Loans and the Allowance for Loan Losses	3 Months Ended
	Mar. 31, 2018
Notes to Financial Statements
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]	4. Outstanding loans are summarized below, in thousands: March 31, December 31, 2018 2017 Commercial $ 41,899 $ 39,620 Agricultural 55,861 58,908 Real estate – residential 15,609 16,624 Real estate – commercial 243,781 240,257 Real estate – construction and land development 26,465 25,181 Equity lines of credit 39,534 41,798 Auto 62,155 60,438 Other 4,038 3,808 Total loans 489,342 486,634 Deferred loan costs, net 2,451 2,283 Allowance for loan losses (6,622 ) (6,669 ) Total net loans $ 485,171 $ 482,248 Changes in the allowance for loan losses, in thousands, were as follows: March 31, December 31, 2018 2017 Balance, beginning of year $ 6,669 $ 6,549 Provision charged to operations 200 600 Losses charged to allowance (449 ) (879 ) Recoveries 202 399 Balance, end of year $ 6,622 $ 6,669 The recorded investment in impaired loans totaled $1,981,000 $2,270,000 March 31, 2018 December 31, 2017, $78,000 $469,000 March 31, 2018 $82,000 $475,000 December 31, 2017. no $1,512,000 $1,795,000 March 31, 2018 December 31, 2017, three March 31, 2018 March 31, 2017 $2,002,000 $5,405,000, $18,000 $43,000 three March 31, 2018 2017, No three March 31, 2018 2017. Included in impaired loans are troubled debt restructurings. A troubled debt restructuring is a formal restructure of a loan where the Company for economic or legal reasons related to the borrower’s financial difficulties, grants a concession to the borrower. The concessions may one In order to determine whether a borrower is experiencing financial difficulty, an evaluation is performed of the probability that the borrower will be in payment default on any of its debt in the foreseeable future without the modification. This evaluation is performed under the Company’s internal underwriting policy. The carrying value of troubled debt restructurings at March 31, 2018 December 31, 2017 $1,109,000 $1,111,000, $61,000 $63,000 March 31, 2018 December 31, 2017. not March 31, 2018 December 31, 2017. There were no three March 31, 2018 March 31, 2017. There were no twelve three March 31, 2018 2017, At March 31, 2018 December 31, 2017, $941,000 $1,226,000, $15,000 $51,000 three March 31, 2018 2017, March 31, 2018 one $0.1 90 December 31, 2017 three one $1.8 90 March 31, 2018 December 31, 2017. Salaries and employee benefits totaling $498,000 $395,000 three March 31, 2018 2017, The Company assigns a risk rating to all loans and periodically, but not $100,000 The risk ratings can be grouped into three Special Mention Substandard not not Doubtful Loans not The following table shows the loan portfolio allocated by management's internal risk ratings at the dates indicated, in thousands: March 31, 201 8 Commercial Credit Exposure Credit Risk Profile by Internally Assigned Grade Commercial Agricultural Real Estate-Residential Real Estate-Commercial Real Estate-Construction Equity LOC Total Grade: Pass $ 41,363 $ 55,530 $ 15,323 $ 240,025 $ 26,367 $ 39,481 $ 418,089 Special Mention 263 254 123 3,474 - - 4,114 Substandard 273 77 163 282 98 53 946 Doubtful - - - - - - - Total $ 41,899 $ 55,861 $ 15,609 $ 243,781 $ 26,465 $ 39,534 $ 423,149 December 31, 201 7 Commercial Credit Exposure Credit Risk Profile by Internally Assigned Grade Commercial Agricultural Real Estate-Residential Real Estate-Commercial Real Estate-Construction Equity LOC Total Grade: Pass $ 38,851 $ 56,859 $ 16,218 $ 239,944 $ 25,081 $ 41,636 $ 418,589 Special Mention 238 253 125 26 - - 642 Substandard 531 1,796 281 287 100 162 3,157 Doubtful - - - - - - - Total $ 39,620 $ 58,908 $ 16,624 $ 240,257 $ 25,181 $ 41,798 $ 422,388 Consumer Credit Exposure Consumer Credit Exposure Credit Risk Profile Based on Payment Activity Credit Risk Profile Based on Payment Activity March 31, 201 8 December 31, 201 7 Auto Other Total Auto Other Total Grade: Performing $ 61,810 $ 4,038 $ 65,848 $ 60,060 $ 3,788 $ 63,848 Non-performing 345 - 345 378 20 398 Total $ 62,155 $ 4,038 $ 66,193 $ 60,438 $ 3,808 $ 64,246 The following tables show the allocation of the allowance for loan losses at the dates indicated, in thousands: Real Real Real Commercial Agricultural Estate-Residential Estate-Commercial Estate-Construction Equity LOC Auto Other Total Three months ended March 31, 201 8 : Allowance for Loan Losses Beginning balance $ 725 $ 623 $ 231 $ 2,729 $ 783 $ 533 $ 946 $ 99 $ 6,669 Charge-offs (265 ) - - - - - (165 ) (19 ) (449 ) Recoveries 7 - 91 17 2 1 82 2 202 Provision 305 (129 ) (110 ) 13 6 (24 ) 114 25 200 Ending balance $ 772 $ 494 $ 212 $ 2,759 $ 791 $ 510 $ 977 $ 107 $ 6,622 Three months ended March 31, 201 7 : Allowance for Loan Losses Beginning balance $ 655 $ 466 $ 280 $ 2,740 $ 927 $ 575 $ 815 $ 91 $ 6,549 Charge-offs - - - - - - (50 ) (5 ) (55 ) Recoveries 8 - 1 2 - - 34 4 49 Provision 125 7 (13 ) 177 (89 ) (14 ) 7 - 200 Ending balance $ 788 $ 473 $ 268 $ 2,919 $ 838 $ 561 $ 806 $ 90 $ 6,743 March 31, 201 8 : Allowance for Loan Losses Ending balance: individually evaluated for impairment $ 2 $ - $ 47 $ - $ 29 $ - $ - $ - $ 78 Ending balance: collectively evaluated for impairment $ 770 $ 494 $ 165 $ 2,759 $ 762 $ 510 $ 977 $ 107 $ 6,544 Loans Ending balance $ 41,899 $ 55,861 $ 15,609 $ 243,781 $ 26,465 $ 39,534 $ 62,155 $ 4,038 $ 489,342 Ending balance: individually evaluated for impairment $ 14 $ 254 $ 813 $ 282 $ 220 $ 53 $ 345 $ - $ 1,981 Ending balance: collectively evaluated for impairment $ 41,885 $ 55,607 $ 14,796 $ 243,499 $ 26,245 $ 39,481 $ 61,810 $ 4,038 $ 487,361 December 31, 201 7 : Allowance for Loan Losses Ending balance: individually evaluated for impairment $ 2 $ - 48 $ - $ 32 $ - $ - $ - $ 82 Ending balance: collectively evaluated for impairment $ 723 $ 623 $ 183 $ 2,729 $ 751 $ 533 $ 946 $ 99 $ 6,587 Loans Ending balance $ 39,620 $ 58,908 $ 16,624 $ 240,257 $ 25,181 $ 41,798 $ 60,438 $ 3,808 $ 486,634 Ending balance: individually evaluated for impairment $ 14 $ 253 $ 934 $ 287 $ 224 $ 162 $ 377 $ 19 $ 2,270 Ending balance: collectively evaluated for impairment $ 39,606 $ 58,655 $ 15,690 $ 239,970 $ 24,957 $ 41,636 $ 60,061 $ 3,789 $ 484,364 The following table shows an aging analysis of the loan portfolio by the time past due, in thousands: Total March 31, 201 8 30-89 Days 90 Days and Still Past Due and Past Due Accruing Nonaccrual Nonaccrual Current Total Commercial $ 1,030 $ - $ - $ 1,030 $ 40,869 $ 41,899 Agricultural - 77 - 77 55,784 55,861 Real estate – residential 129 - 163 292 15,317 15,609 Real estate – commercial 1,266 - 282 1,548 242,233 243,781 Real estate - construction & land - - 98 98 26,367 26,465 Equity Lines of Credit 440 - 53 493 39,041 39,534 Auto 1,083 - 345 1,428 60,727 62,155 Other 37 - - 37 4,001 4,038 Total $ 3,985 $ 77 $ 941 $ 5,003 $ 484,339 $ 489,342 Total December 31, 201 7 30-89 Days 90 Days and Still Past Due and Past Due Accruing Nonaccrual Nonaccrual Current Total Commercial $ 1,869 $ - $ - $ 1,869 $ 37,751 $ 39,620 Agricultural - 1,796 - 1,796 57,112 58,908 Real estate – residential 130 - 281 411 16,213 16,624 Real estate - commercial - - 287 287 239,970 240,257 Real estate - construction & land 38 - 100 138 25,043 25,181 Equity Lines of Credit 345 - 162 507 41,291 41,798 Auto 1,047 - 377 1,424 59,014 60,438 Other 20 - 19 39 3,769 3,808 Total $ 3,449 $ 1,796 $ 1,226 $ 6,471 $ 480,163 $ 486,634 The following tables show information related to impaired loans at the dates indicated, in thousands: Unpaid Average Interest Recorded Principal Related Recorded Income As of March 31, 201 8 : Investment Balance Allowance Investment Recognized With no related allowance recorded: Commercial $ - $ - $ - $ - Agricultural 254 254 254 5 Real estate – residential 578 589 581 9 Real estate – commercial 282 282 285 - Real estate – construction & land - - - - Equity Lines of Credit 53 53 56 - Auto 345 345 354 - Other - - - - With an allowance recorded: Commercial $ 14 $ 14 $ 2 $ 14 $ - Agricultural - - - - - Real estate – residential 235 235 47 236 2 Real estate – commercial - - - - - Real estate – construction & land 220 220 29 222 2 Equity Lines of Credit - - - - - Auto - - - - - Other - - - - - Total: Commercial $ 14 $ 14 $ 2 $ 14 $ - Agricultural 254 254 - 254 5 Real estate – residential 813 824 47 817 11 Real estate – commercial 282 282 - 285 - Real estate – construction & land 220 220 29 222 2 Equity Lines of Credit 53 53 - 56 - Auto 345 345 - 354 - Other - - - - - Total $ 1,981 $ 1,992 $ 78 $ 2,002 $ 18 Unpaid Average Interest Recorded Principal Related Recorded Income As of December 31, 201 7 : Investment Balance Allowance Investment Recognized With no related allowance recorded: Commercial $ - $ - $ - $ - Agricultural 253 253 255 19 Real estate – residential 697 708 548 38 Real estate – commercial 287 287 184 - Real estate – construction & land - - - - Equity Lines of Credit 162 162 180 - Auto 377 377 144 - Other 19 19 1 - With an allowance recorded: Commercial $ 14 $ 14 $ 2 $ 15 $ 1 Agricultural - - - - - Real estate – residential 237 237 48 203 7 Real estate – commercial - - - - - Real estate – construction & land 224 224 32 230 8 Equity Lines of Credit - - - - - Auto - - - - - Other - - - - - Total: Commercial $ 14 $ 14 $ 2 $ 15 $ 1 Agricultural 253 253 - 255 19 Real estate – residential 934 945 48 751 45 Real estate – commercial 287 287 - 184 - Real estate – construction & land 224 224 32 230 8 Equity Lines of Credit 162 162 - 180 - Auto 377 377 - 144 - Other 19 19 - 1 - Total $ 2,270 $ 2,281 $ 82 $ 1,760 $ 73

Note 5 - Commitments and Contin

Note 5 - Commitments and Contingencies	3 Months Ended
	Mar. 31, 2018
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	5. The Company is party to claims and legal proceedings arising in the ordinary course of business. In the opinion of the Company’s management, the amount of ultimate liability with respect to such proceedings will not In the normal course of business, there are various outstanding commitments to extend credit, which are not $108.8 $107.4 $477 $477 March 31, 2018 December 31, 2017, Of the loan commitments outstanding at March 31, 2018, $16.1 twelve not may Stand-by letters of credit are conditional commitments written to guarantee the performance of a customer to a third not March 31, 2018 December 31, 2017.

Note 6 - Earnings Per Share

Note 6 - Earnings Per Share	3 Months Ended
	Mar. 31, 2018
Notes to Financial Statements
Earnings Per Share [Text Block]	6. Basic earnings per share is computed by dividing income available to common shareholders by the weighted average number of common shares outstanding for the period. Diluted earnings per share reflects the potential dilution that could occur if securities or other contracts to issue common stock, such as stock options, result in the issuance of common stock which shares in the earnings of the Company. The treasury stock method has been applied to determine the dilutive effect of stock options in computing diluted earnings per share. For the Three Months Ended March 31, (In thousands, except per share data) 2018 2017 Net Income: Net income $ 3,280 $ 2,064 Earnings Per Share: Basic earnings per share $ 0.65 $ 0.42 Diluted earnings per share $ 0.63 $ 0.40 Weighted Average Number of Shares Outstanding: Basic shares 5,071 4,911 Diluted shares 5,208 5,164

Note 7 - Stock-based Compensati

Note 7 - Stock-based Compensation	3 Months Ended
	Mar. 31, 2018
Notes to Financial Statements
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]	7. Stock Options In 2001, 39,793 no March 31, 2018. As of March 31, 2018, no A summary of the activity within the 2001 Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term in Years Intrinsic Value Options outstanding at January 1, 2018 46,293 $ 2.95 Options exercised (6,500 ) 2.95 Options outstanding at March 31, 2018 39,793 $ 2.95 1.0 $ 873,000 Options exercisable at March 31, 2018 39,793 $ 2.95 1.0 $ 873,000 In May 2013, 2013 453,800 230,400 March 31, 2018. may not six not ten During the three March 31, 2018 76,000 No three March 31, 2017. 2018 Expected life of stock options (in years) 5.1 Risk free interest rate 2.38 % Volatility 30.4 % Dividend yields 1.39 % Weighted-average fair value of options granted during the three months ended March 31, 2018 $ 6.54 The Company determines the fair value of options on the date of grant using a Black-Scholes-Merton option pricing model that uses assumptions based on expected option life, expected stock volatility and the risk-free interest rate. The expected volatility assumptions used by the Company are based on the historical volatility of the Company’s common stock over the most recent period commensurate with the estimated expected life of the Company’s stock options. The Company bases its expected life assumption on its historical experience and on the terms and conditions of the stock options it grants to employees. The risk-free rate is based on the U.S. Treasury yield curve for the periods within the contractual life of the options in effect at the time of the grant. A summary of the activity within the 2013 Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term in Years Intrinsic Value Options outstanding at January 1, 2018 160,600 $ 7.72 Options granted 76,000 24.40 Options cancelled (800 ) 24.40 Options exercised (12,400 ) 7.50 Options outstanding at March 31, 2018 223,400 $ 13.35 6.1 $ 2,580,000 Options exercisable at March 31, 2018 79,200 $ 7.54 5.0 $ 1,375,000 Expected to vest after March 31, 2018 128,492 $ 16.54 6.7 $ 1,074,000 As of March 31, 2018, $641,000 3.1 The total fair value of options vested during the three March 31, 2018 2017 $84,000 $90,000, $351,000 $424,000 three March 31, 2018 2017, Compensation cost related to stock options recognized in operating results under the plans was $47,000 $43,000 three March 31, 2018 2017, $5,000 three March 31, 2018 March 31, 2017. Cash received from option exercises under the plans for the three March 31, 2018 2017 $82,000 $123,000, $65,000 $45,000 three March 31, 2018 2017,

Note 8 - Income Taxes

Note 8 - Income Taxes	3 Months Ended
	Mar. 31, 2018
Notes to Financial Statements
Income Tax Disclosure [Text Block]	8. The Company files its income taxes on a consolidated basis with its subsidiary. Income tax expense is the total of current year income tax due or refundable and the change in deferred tax assets and liabilities. Deferred tax assets and liabilities are recognized for the tax consequences of temporary differences between the reported amount of assets and liabilities and their tax bases. Deferred tax assets and liabilities are adjusted for the effects of changes in tax laws and rates on the date of enactment. A valuation allowance is recognized if, based on the weight of available evidence management believes it is more likely than not not When tax returns are filed, it is highly certain that some positions taken would be sustained upon examination by the taxing authorities, while others are subject to uncertainty about the merits of the position taken or the amount of the position that would be ultimately sustained. The benefit of a tax position is recognized in the financial statements in the period during which, based on all available evidence, management believes it is more likely than not not not 50 Interest expense and penalties associated with unrecognized tax benefits, if any, are classified as income tax expense in the consolidated income statement. There have been no three March 31, 2018.

Note 9 - Fair Value Measurement

Note 9 - Fair Value Measurement	3 Months Ended
	Mar. 31, 2018
Notes to Financial Statements
Fair Value Disclosures [Text Block]	9. The Company measures fair value under the fair value hierarchy described below. Level 1: Level 2: not Level 3: one not may In certain cases, the inputs used to measure fair value may Management monitors the availability of observable market data to assess the appropriate classification of financial instruments within the fair value hierarchy. Changes in economic conditions or model-based valuation techniques may one Management evaluates the significance of transfers between levels based upon the nature of the financial instrument and size of the transfer relative to total assets, total liabilities or total earnings. The methods of determining the fair value of assets and liabilities presented in this note as of March 31, 2018 3 2017 10 2016 01. not Fair Value of Financial Instruments The carrying amounts and estimated fair values of financial instruments, at March 31, 2018 Fair Value Measurements at March 31, 2018 Using: Carrying Value Level 1 Level 2 Level 3 Total Fair Value Financial assets: Cash and cash equivalents $ 64,690 $ 64,690 $ 64,690 Investment securities 148,180 $ 148,180 148,180 Loans, net 485,171 $ 486,517 486,517 FHLB stock 2,685 N/A Accrued interest receivable 2,460 34 501 1,925 2,460 Financial liabilities: Deposits 652,791 610,354 42,455 652,809 Repurchase agreements 8,675 8,675 8,675 Junior subordinated deferrable interest debentures 10,310 8,065 8,065 Accrued interest payable 65 10 38 17 65 The carrying amounts and estimated fair values of financial instruments, at December 31, 2017 Fair Value Measurements at December 31, 2017 Using: Carrying Value Level 1 Level 2 Level 3 Total Fair Value Financial assets: Cash and cash equivalents $ 87,537 $ 87,537 $ 87,537 Investment securities 137,466 $ 137,466 137,466 Loans, net 482,248 $ 484,269 484,269 FHLB stock 2,685 N/A Accrued interest receivable 2,582 31 522 2,029 2,582 Financial liabilities: Deposits 662,657 616,617 46,061 662,678 Repurchase agreements 10,074 10,074 10,074 Junior subordinated deferrable interest debentures 10,310 7,829 7,829 Accrued interest payable 64 10 39 15 64 Because no 3. These estimates do not one not The following tables present information about the Company’s assets and liabilities measured at fair value on a recurring and non-recurring basis as of March 31, 2018 December 31, 2017, Assets and liabilities measured at fair value on a recurring basis at March 31, 2018 Fair Value Measurements at March 31, 2018 Using Total Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets: U.S. Government-sponsored agencies collateralized by mortgage obligations- residential $ 116,470 $ - $ 116,470 $ - Obligations of states and political subdivisions 31,710 31,710 $ 148,180 $ - $ 148,180 $ - Assets and liabilities measured at fair value on a recurring basis at December 31, 2017 Fair Value Measurements at December 31, 2017 Using Total Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets: U.S. Government-sponsored agencies collateralized by mortgage obligations- residential $ 103,788 $ - $ 103,788 $ - Obligations of states and political subdivisions 33,678 33,678 $ 137,466 $ - $ 137,466 $ - The fair value of securities available-for-sale equals quoted market price, if available. If quoted market prices are not no 2018 2017. Assets and liabilities measured at fair value on a non-recurring basis at March 31, 2018 Fair Value Measurements at March 31, 2018 Using Total Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Gains Three Months Ended March 31, 2018 Assets: Impaired loans: Construction and land $ 82 $ $ $ 82 $ 3 Total impaired loans 82 - - 82 3 Other real estate: Real estate – residential 114 114 - Real estate – commercial 285 285 - Construction and land 592 592 - Equity lines of credit 90 90 - Total other real estate 1,081 - - 1,081 - $ 1,163 $ - $ - $ 1,163 $ 3 Assets and liabilities measured at fair value on a non-recurring basis at December 31, 2017 Fair Value Measurements at December 31, 2017 Using Total Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Losses Three Months Ended March 31, 2017 Assets: Impaired loans: Construction and land $ 80 $ $ $ 80 $ - Total impaired loans 80 - - 80 - Other real estate: Real estate – residential - - Real estate – commercial 285 285 (9 ) Construction and land 969 969 Equity lines of credit 90 90 - Total other real estate 1,344 - - 1,344 (9 ) $ 1,424 $ - $ - $ 1,424 $ (9 ) The Company has no The following methods were used to estimate fair value. Collateral-Dependent Impaired Loans: not third 3 $3,000 9,000 March 31, 2018 2017, Other Real Estate: third 3 Appraisals for both collateral-dependent impaired loans and other real estate are performed by certified general appraisers (for commercial properties) or certified residential appraisers (for residential properties) whose qualifications and licenses have been reviewed and verified by the Company. Once received, a member of the Loan Administration Department reviews the assumptions and approaches utilized in the appraisal as well as the overall resulting fair value in comparison with independent data sources such as recent market data or industry-wide statistics. On a quarterly basis, the Company compares the actual selling price of similar collateral that has been liquidated to the most recent appraised value for unsold properties to determine what additional adjustment, if any, should be made to the appraisal value to arrive at fair value. Adjustments are routinely made in the appraisal process by the independent appraisers to adjust for differences between the comparable sales and income data available. The following table presents quantitative information about Level 3 March 31, 2018 December 31, 2017 ( Range Range Description Fair Value 3/31/2018 Fair Value 12/31/2017 Valuation Technique Significant Unobservable Input (Weighted Average) 3/31/2018 (Weighted Average) 12/31/2017 Impaired Loans: Construction and land $ 82 $ 80 Third Party appraisals Management Adjustments to Reflect Current Conditions and Selling Costs 8% (8%) 8% (8%) Other Real Estate: RE – Residential $ 114 $ - Third Party appraisals Management Adjustments to Reflect Current Conditions and Selling Costs 10% (10%) N/A RE – Commercial $ 285 $ 285 Third Party appraisals Management Adjustments to Reflect Current Conditions and Selling Costs 17%- 31% (22%) 17%- 31% (22%) Construction and land $ 592 $ 969 Third Party appraisals Management Adjustments to Reflect Current Conditions and Selling Costs 10% (10%) 10% (10%) Equity Lines of Credit $ 90 $ 90 Third Party appraisals Management Adjustments to Reflect Current Conditions and Selling Costs 10% (10%) 10% (10%)

Significant Accounting Policies

Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
Consolidation, Policy [Policy Text Block]	Consolidation and Basis of Presentation The condensed consolidated financial statements include the accounts of the Company and the accounts of its wholly-owned subsidiary, Plumas Bank. Plumas Statutory Trust I and Plumas Statutory Trust II are not March 31, 2018 three March 31, 2018 2017. December 31, 2017 The unaudited condensed consolidated financial statements of the Company have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) for interim reporting on Form 10 not 2017 10 three March 31, 2018 may not Management has determined that because all of the commercial banking products and services offered by the Company are available in each branch of the Bank, all branches are located within the same economic environment and management does not No 10%
Reclassification, Policy [Policy Text Block]	Reclassifications Certain reclassifications have been made to prior years’ balances to conform to the classifications used in 2017. no
Segment Reporting, Policy [Policy Text Block]	Segment Information Management has determined that since all of the banking products and services offered by the Company are available in each branch of the Bank, all branches are located within the same economic environment and management does not No 10
Revenue Recognition, Policy [Policy Text Block]	Revenue from Contracts with Customers The Company records revenue from contracts with customers in accordance with Accounting Standards Codification Topic 606, 606” 606, not Most of our revenue-generating transactions are not 606, not 606
Income Tax, Policy [Policy Text Block]	Income Taxes On December 22, 2017, 1986, 35% 21% 21%. 2017 $1.4 no three March 31, 2018.
New Accounting Pronouncements, Policy [Policy Text Block]	Recently Adopted Accounting Pronouncements In February 2018, 2018 02, 2018 02 December 22, 2017, 2017 $94,000. In May 2014, No. 2014 09 No. 2014 09” January 1, 2018. 2014 09 not not 2014 09. 2014 09, not not 2014 09 not not On January 5, 2016, 2016 01, December 15, 2017, No. 2016 01 January 1, 2018 $209,000 $662,000 not Pending Accounting Pronouncements On February 25, 2016, 2016 02, not 12 2016 02 December 15, 2018. two not No. 2016 02. No. 2016 02 not In June 2016, No. 2016 13, No. 2016 13 1 2 not not No. 2016 13 No. 2016 13 December 15, 2019; December 15, 2018. first No. 2016 13 On March 30, 2017, 2017 08, not 2017 08 December 15, 2018. first No. 2017 08. No. 2017 08 not

Note 3 - Investment Securitie17

Note 3 - Investment Securities Available for Sale (Tables)	3 Months Ended
	Mar. 31, 2018
Notes Tables
Schedule of Available-for-sale Securities Reconciliation [Table Text Block]	Available-for-Sale March 31, 2018 Gross Gross Amortized Unrealized Unrealized Fair Cost Gains Losses Value Debt securities: U.S. Government-sponsored agencies collateralized by mortgage obligations- residential $ 119,337 $ 32 $ (2,899 ) $ 116,470 Obligations of states and political subdivisions 32,233 92 (615 ) 31,710 $ 151,570 $ 124 $ (3,514 ) $ 148,180 Available-for-Sale December 31, 2017 Gross Gross Amortized Unrealized Unrealized Fair Cost Gains Losses Value Debt securities: U.S. Government-sponsored agencies collateralized by mortgage obligations- residential $ 104,935 $ 26 $ (1,173 ) $ 103,788 Obligations of states and political subdivisions 33,340 482 (144 ) 33,678 $ 138,275 $ 508 $ (1,317 ) $ 137,466
Schedule of Unrealized Loss on Investments [Table Text Block]	March 31, 2018 Less than 12 Months 12 Months or More Total Fair Unrealized Fair Unrealized Fair Unrealized Value Losses Value Losses Value Losses Debt securities: U.S.Government-sponsored agencies collateralized by mortgage obligations-residential $ 72,580 $ 1,632 $ 29,541 $ 1,267 $ 102,121 $ 2,899 Obligations of states and political subdivisions 20,184 376 3,276 239 23,460 615 $ 92,764 $ 2,008 $ 32,817 $ 1,506 $ 125,581 $ 3,514 December 31, 2017 Less than 12 Months 12 Months or More Total Fair Unrealized Fair Unrealized Fair Unrealized Value Losses Value Losses Value Losses Debt securities: U.S.Government-sponsored agencies collateralized by mortgage obligations-residential $ 60,070 $ 441 $ 31,213 $ 732 $ 91,283 $ 1,173 Obligations of states and political subdivisions 2,621 31 3,403 113 6,024 144 $ 62,691 $ 472 $ 34,616 $ 845 $ 97,307 $ 1,317
Investments Classified by Contractual Maturity Date [Table Text Block]	Amortized Cost Estimated Fair Value Within one year $ - $ - After one year through five years 2,937 2,938 After five years through ten years 16,910 16,682 After ten years 12,386 12,090 Investment securities not due at a single maturity date: Government-sponsored mortgage-backed securities 119,337 116,470 $ 151,570 $ 148,180

Note 4 - Loans and the Allowa18

Note 4 - Loans and the Allowance for Loan Losses (Tables)	3 Months Ended
	Mar. 31, 2018
Notes Tables
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]	March 31, December 31, 2018 2017 Commercial $ 41,899 $ 39,620 Agricultural 55,861 58,908 Real estate – residential 15,609 16,624 Real estate – commercial 243,781 240,257 Real estate – construction and land development 26,465 25,181 Equity lines of credit 39,534 41,798 Auto 62,155 60,438 Other 4,038 3,808 Total loans 489,342 486,634 Deferred loan costs, net 2,451 2,283 Allowance for loan losses (6,622 ) (6,669 ) Total net loans $ 485,171 $ 482,248
Allowance for Credit Losses on Financing Receivables [Table Text Block]	March 31, December 31, 2018 2017 Balance, beginning of year $ 6,669 $ 6,549 Provision charged to operations 200 600 Losses charged to allowance (449 ) (879 ) Recoveries 202 399 Balance, end of year $ 6,622 $ 6,669
Financing Receivable Credit Quality Indicators [Table Text Block]	March 31, 201 8 Commercial Credit Exposure Credit Risk Profile by Internally Assigned Grade Commercial Agricultural Real Estate-Residential Real Estate-Commercial Real Estate-Construction Equity LOC Total Grade: Pass $ 41,363 $ 55,530 $ 15,323 $ 240,025 $ 26,367 $ 39,481 $ 418,089 Special Mention 263 254 123 3,474 - - 4,114 Substandard 273 77 163 282 98 53 946 Doubtful - - - - - - - Total $ 41,899 $ 55,861 $ 15,609 $ 243,781 $ 26,465 $ 39,534 $ 423,149 December 31, 201 7 Commercial Credit Exposure Credit Risk Profile by Internally Assigned Grade Commercial Agricultural Real Estate-Residential Real Estate-Commercial Real Estate-Construction Equity LOC Total Grade: Pass $ 38,851 $ 56,859 $ 16,218 $ 239,944 $ 25,081 $ 41,636 $ 418,589 Special Mention 238 253 125 26 - - 642 Substandard 531 1,796 281 287 100 162 3,157 Doubtful - - - - - - - Total $ 39,620 $ 58,908 $ 16,624 $ 240,257 $ 25,181 $ 41,798 $ 422,388
Schedule of Credit Losses Related to Financing Receivables, Current and Noncurrent [Table Text Block]	Real Real Real Commercial Agricultural Estate-Residential Estate-Commercial Estate-Construction Equity LOC Auto Other Total Three months ended March 31, 201 8 : Allowance for Loan Losses Beginning balance $ 725 $ 623 $ 231 $ 2,729 $ 783 $ 533 $ 946 $ 99 $ 6,669 Charge-offs (265 ) - - - - - (165 ) (19 ) (449 ) Recoveries 7 - 91 17 2 1 82 2 202 Provision 305 (129 ) (110 ) 13 6 (24 ) 114 25 200 Ending balance $ 772 $ 494 $ 212 $ 2,759 $ 791 $ 510 $ 977 $ 107 $ 6,622 Three months ended March 31, 201 7 : Allowance for Loan Losses Beginning balance $ 655 $ 466 $ 280 $ 2,740 $ 927 $ 575 $ 815 $ 91 $ 6,549 Charge-offs - - - - - - (50 ) (5 ) (55 ) Recoveries 8 - 1 2 - - 34 4 49 Provision 125 7 (13 ) 177 (89 ) (14 ) 7 - 200 Ending balance $ 788 $ 473 $ 268 $ 2,919 $ 838 $ 561 $ 806 $ 90 $ 6,743 March 31, 201 8 : Allowance for Loan Losses Ending balance: individually evaluated for impairment $ 2 $ - $ 47 $ - $ 29 $ - $ - $ - $ 78 Ending balance: collectively evaluated for impairment $ 770 $ 494 $ 165 $ 2,759 $ 762 $ 510 $ 977 $ 107 $ 6,544 Loans Ending balance $ 41,899 $ 55,861 $ 15,609 $ 243,781 $ 26,465 $ 39,534 $ 62,155 $ 4,038 $ 489,342 Ending balance: individually evaluated for impairment $ 14 $ 254 $ 813 $ 282 $ 220 $ 53 $ 345 $ - $ 1,981 Ending balance: collectively evaluated for impairment $ 41,885 $ 55,607 $ 14,796 $ 243,499 $ 26,245 $ 39,481 $ 61,810 $ 4,038 $ 487,361 December 31, 201 7 : Allowance for Loan Losses Ending balance: individually evaluated for impairment $ 2 $ - 48 $ - $ 32 $ - $ - $ - $ 82 Ending balance: collectively evaluated for impairment $ 723 $ 623 $ 183 $ 2,729 $ 751 $ 533 $ 946 $ 99 $ 6,587 Loans Ending balance $ 39,620 $ 58,908 $ 16,624 $ 240,257 $ 25,181 $ 41,798 $ 60,438 $ 3,808 $ 486,634 Ending balance: individually evaluated for impairment $ 14 $ 253 $ 934 $ 287 $ 224 $ 162 $ 377 $ 19 $ 2,270 Ending balance: collectively evaluated for impairment $ 39,606 $ 58,655 $ 15,690 $ 239,970 $ 24,957 $ 41,636 $ 60,061 $ 3,789 $ 484,364
Past Due Financing Receivables [Table Text Block]	Total March 31, 201 8 30-89 Days 90 Days and Still Past Due and Past Due Accruing Nonaccrual Nonaccrual Current Total Commercial $ 1,030 $ - $ - $ 1,030 $ 40,869 $ 41,899 Agricultural - 77 - 77 55,784 55,861 Real estate – residential 129 - 163 292 15,317 15,609 Real estate – commercial 1,266 - 282 1,548 242,233 243,781 Real estate - construction & land - - 98 98 26,367 26,465 Equity Lines of Credit 440 - 53 493 39,041 39,534 Auto 1,083 - 345 1,428 60,727 62,155 Other 37 - - 37 4,001 4,038 Total $ 3,985 $ 77 $ 941 $ 5,003 $ 484,339 $ 489,342 Total December 31, 201 7 30-89 Days 90 Days and Still Past Due and Past Due Accruing Nonaccrual Nonaccrual Current Total Commercial $ 1,869 $ - $ - $ 1,869 $ 37,751 $ 39,620 Agricultural - 1,796 - 1,796 57,112 58,908 Real estate – residential 130 - 281 411 16,213 16,624 Real estate - commercial - - 287 287 239,970 240,257 Real estate - construction & land 38 - 100 138 25,043 25,181 Equity Lines of Credit 345 - 162 507 41,291 41,798 Auto 1,047 - 377 1,424 59,014 60,438 Other 20 - 19 39 3,769 3,808 Total $ 3,449 $ 1,796 $ 1,226 $ 6,471 $ 480,163 $ 486,634
Impaired Financing Receivables [Table Text Block]	Unpaid Average Interest Recorded Principal Related Recorded Income As of March 31, 201 8 : Investment Balance Allowance Investment Recognized With no related allowance recorded: Commercial $ - $ - $ - $ - Agricultural 254 254 254 5 Real estate – residential 578 589 581 9 Real estate – commercial 282 282 285 - Real estate – construction & land - - - - Equity Lines of Credit 53 53 56 - Auto 345 345 354 - Other - - - - With an allowance recorded: Commercial $ 14 $ 14 $ 2 $ 14 $ - Agricultural - - - - - Real estate – residential 235 235 47 236 2 Real estate – commercial - - - - - Real estate – construction & land 220 220 29 222 2 Equity Lines of Credit - - - - - Auto - - - - - Other - - - - - Total: Commercial $ 14 $ 14 $ 2 $ 14 $ - Agricultural 254 254 - 254 5 Real estate – residential 813 824 47 817 11 Real estate – commercial 282 282 - 285 - Real estate – construction & land 220 220 29 222 2 Equity Lines of Credit 53 53 - 56 - Auto 345 345 - 354 - Other - - - - - Total $ 1,981 $ 1,992 $ 78 $ 2,002 $ 18 Unpaid Average Interest Recorded Principal Related Recorded Income As of December 31, 201 7 : Investment Balance Allowance Investment Recognized With no related allowance recorded: Commercial $ - $ - $ - $ - Agricultural 253 253 255 19 Real estate – residential 697 708 548 38 Real estate – commercial 287 287 184 - Real estate – construction & land - - - - Equity Lines of Credit 162 162 180 - Auto 377 377 144 - Other 19 19 1 - With an allowance recorded: Commercial $ 14 $ 14 $ 2 $ 15 $ 1 Agricultural - - - - - Real estate – residential 237 237 48 203 7 Real estate – commercial - - - - - Real estate – construction & land 224 224 32 230 8 Equity Lines of Credit - - - - - Auto - - - - - Other - - - - - Total: Commercial $ 14 $ 14 $ 2 $ 15 $ 1 Agricultural 253 253 - 255 19 Real estate – residential 934 945 48 751 45 Real estate – commercial 287 287 - 184 - Real estate – construction & land 224 224 32 230 8 Equity Lines of Credit 162 162 - 180 - Auto 377 377 - 144 - Other 19 19 - 1 - Total $ 2,270 $ 2,281 $ 82 $ 1,760 $ 73
Consumer Portfolio Segment [Member]
Notes Tables
Financing Receivable Credit Quality Indicators [Table Text Block]	Consumer Credit Exposure Consumer Credit Exposure Credit Risk Profile Based on Payment Activity Credit Risk Profile Based on Payment Activity March 31, 201 8 December 31, 201 7 Auto Other Total Auto Other Total Grade: Performing $ 61,810 $ 4,038 $ 65,848 $ 60,060 $ 3,788 $ 63,848 Non-performing 345 - 345 378 20 398 Total $ 62,155 $ 4,038 $ 66,193 $ 60,438 $ 3,808 $ 64,246

Note 6 - Earnings Per Share (Ta

Note 6 - Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2018
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	For the Three Months Ended March 31, (In thousands, except per share data) 2018 2017 Net Income: Net income $ 3,280 $ 2,064 Earnings Per Share: Basic earnings per share $ 0.65 $ 0.42 Diluted earnings per share $ 0.63 $ 0.40 Weighted Average Number of Shares Outstanding: Basic shares 5,071 4,911 Diluted shares 5,208 5,164

Note 7 - Stock-based Compensa20

Note 7 - Stock-based Compensation (Tables)	3 Months Ended
	Mar. 31, 2018
Notes Tables
Share-based Compensation, Stock Options, Activity [Table Text Block]	Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term in Years Intrinsic Value Options outstanding at January 1, 2018 46,293 $ 2.95 Options exercised (6,500 ) 2.95 Options outstanding at March 31, 2018 39,793 $ 2.95 1.0 $ 873,000 Options exercisable at March 31, 2018 39,793 $ 2.95 1.0 $ 873,000 Shares Weighted Average Exercise Price Weighted Average Remaining Contractual Term in Years Intrinsic Value Options outstanding at January 1, 2018 160,600 $ 7.72 Options granted 76,000 24.40 Options cancelled (800 ) 24.40 Options exercised (12,400 ) 7.50 Options outstanding at March 31, 2018 223,400 $ 13.35 6.1 $ 2,580,000 Options exercisable at March 31, 2018 79,200 $ 7.54 5.0 $ 1,375,000 Expected to vest after March 31, 2018 128,492 $ 16.54 6.7 $ 1,074,000
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	2018 Expected life of stock options (in years) 5.1 Risk free interest rate 2.38 % Volatility 30.4 % Dividend yields 1.39 % Weighted-average fair value of options granted during the three months ended March 31, 2018 $ 6.54

Note 9 - Fair Value Measureme21

Note 9 - Fair Value Measurement (Tables)	3 Months Ended
	Mar. 31, 2018
Notes Tables
Fair Value, by Balance Sheet Grouping [Table Text Block]	Fair Value Measurements at March 31, 2018 Using: Carrying Value Level 1 Level 2 Level 3 Total Fair Value Financial assets: Cash and cash equivalents $ 64,690 $ 64,690 $ 64,690 Investment securities 148,180 $ 148,180 148,180 Loans, net 485,171 $ 486,517 486,517 FHLB stock 2,685 N/A Accrued interest receivable 2,460 34 501 1,925 2,460 Financial liabilities: Deposits 652,791 610,354 42,455 652,809 Repurchase agreements 8,675 8,675 8,675 Junior subordinated deferrable interest debentures 10,310 8,065 8,065 Accrued interest payable 65 10 38 17 65 Fair Value Measurements at December 31, 2017 Using: Carrying Value Level 1 Level 2 Level 3 Total Fair Value Financial assets: Cash and cash equivalents $ 87,537 $ 87,537 $ 87,537 Investment securities 137,466 $ 137,466 137,466 Loans, net 482,248 $ 484,269 484,269 FHLB stock 2,685 N/A Accrued interest receivable 2,582 31 522 2,029 2,582 Financial liabilities: Deposits 662,657 616,617 46,061 662,678 Repurchase agreements 10,074 10,074 10,074 Junior subordinated deferrable interest debentures 10,310 7,829 7,829 Accrued interest payable 64 10 39 15 64
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	Fair Value Measurements at March 31, 2018 Using Total Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets: U.S. Government-sponsored agencies collateralized by mortgage obligations- residential $ 116,470 $ - $ 116,470 $ - Obligations of states and political subdivisions 31,710 31,710 $ 148,180 $ - $ 148,180 $ - Fair Value Measurements at December 31, 2017 Using Total Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Assets: U.S. Government-sponsored agencies collateralized by mortgage obligations- residential $ 103,788 $ - $ 103,788 $ - Obligations of states and political subdivisions 33,678 33,678 $ 137,466 $ - $ 137,466 $ -
Fair Value Measurements, Nonrecurring [Table Text Block]	Fair Value Measurements at March 31, 2018 Using Total Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Gains Three Months Ended March 31, 2018 Assets: Impaired loans: Construction and land $ 82 $ $ $ 82 $ 3 Total impaired loans 82 - - 82 3 Other real estate: Real estate – residential 114 114 - Real estate – commercial 285 285 - Construction and land 592 592 - Equity lines of credit 90 90 - Total other real estate 1,081 - - 1,081 - $ 1,163 $ - $ - $ 1,163 $ 3 Fair Value Measurements at December 31, 2017 Using Total Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total Losses Three Months Ended March 31, 2017 Assets: Impaired loans: Construction and land $ 80 $ $ $ 80 $ - Total impaired loans 80 - - 80 - Other real estate: Real estate – residential - - Real estate – commercial 285 285 (9 ) Construction and land 969 969 Equity lines of credit 90 90 - Total other real estate 1,344 - - 1,344 (9 ) $ 1,424 $ - $ - $ 1,424 $ (9 )
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]	Range Range Description Fair Value 3/31/2018 Fair Value 12/31/2017 Valuation Technique Significant Unobservable Input (Weighted Average) 3/31/2018 (Weighted Average) 12/31/2017 Impaired Loans: Construction and land $ 82 $ 80 Third Party appraisals Management Adjustments to Reflect Current Conditions and Selling Costs 8% (8%) 8% (8%) Other Real Estate: RE – Residential $ 114 $ - Third Party appraisals Management Adjustments to Reflect Current Conditions and Selling Costs 10% (10%) N/A RE – Commercial $ 285 $ 285 Third Party appraisals Management Adjustments to Reflect Current Conditions and Selling Costs 17%- 31% (22%) 17%- 31% (22%) Construction and land $ 592 $ 969 Third Party appraisals Management Adjustments to Reflect Current Conditions and Selling Costs 10% (10%) 10% (10%) Equity Lines of Credit $ 90 $ 90 Third Party appraisals Management Adjustments to Reflect Current Conditions and Selling Costs 10% (10%) 10% (10%)

Note 1 - The Business of Plum22

Note 1 - The Business of Plumas Bancorp (Details Textual)	Mar. 31, 2018
Number of Branches	11

Note 2 - Summary of Significa23

Note 2 - Summary of Significant Accounting Policies (Details Textual) xbrli-pure in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018USD ($)	Mar. 31, 2017USD ($)	Dec. 31, 2017USD ($)
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability	$ 1,400,000
Gain on Adjusting Carrying Value of Equity Securities with No Readily Determinable Fair Value	209,000
Accounting Standards Update 2016-01 [Member]
Gain on Adjusting Carrying Value of Equity Securities with No Readily Determinable Fair Value	209,000
Equity Securities without Readily Determinable Fair Value, Amount	$ 662,000
Retained Earnings [Member] | Accounting Standards Update 2018-02 [Member]
Tax Cuts and Jobs Act of 2017 Reclassification From Aoci to Retained Earnings			$ 94,000
Customer Concentration Risk [Member] | Sales Revenue, Net [Member]
Number of Major Customers	0

Note 3 - Investment Securitie24

Note 3 - Investment Securities Available for Sale (Details Textual)	3 Months Ended		12 Months Ended
	Mar. 31, 2018USD ($)	Mar. 31, 2017USD ($)	Dec. 31, 2017USD ($)
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax, Total	$ (3,390,000)		$ (809,000)
Available-for-sale Securities Income Tax Expense (Benefit) on Accumulated Gross Unrealized Gains Losses	$ (1,002,000)		(239,000)
Number of Securities Sold During Period	18	7
Proceeds from Sale of Debt Securities, Available-for-sale	$ 4,157,000	$ 4,221,000
Available-for-sale Securities, Gross Realized Gain (Loss), Total	$ (8,000)	$ (17,000)
Number of Securities Sold for Gain	8	4
Available-for-sale Securities, Gross Realized Gains	$ 4,000	$ 4,000
Number of Securities Sold for Loss	10	3
Available-for-sale Securities, Gross Realized Losses	$ 12,000		$ 21,000
Available-for-sale Securities Transfers to Trading and Held to Maturity	0		0
Debt Securities, Held-to-maturity, Total	$ 0		$ 0
Number of Investment Securities	187
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	152
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	116
Available-for-sale Debt Securities Pledged to Secure Deposits and Repurchase Agreements Amortized Cost Basis	$ 78,613,000		82,059,000
Collateral Pledged [Member]
Debt Securities, Available-for-sale, Restricted	$ 76,216,000		$ 81,006,000
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Number of Investment Securities	83
US States and Political Subdivisions Debt Securities [Member]
Number of Investment Securities	104

Note 3 - Investment Securitie25

Note 3 - Investment Securities Available for Sale - Amortized Cost and Estimated Fair Value of Investment Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Investment securities available for sale, amortized cost	$ 151,570	$ 138,275
Investment securities available for sale, gross unrealized gains	124	508
Investment securities available for sale, gross unrealized losses	(3,514)	(1,317)
Investment securities available for sale, Estimated fair value	148,180	137,466
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Investment securities available for sale, amortized cost	119,337	104,935
Investment securities available for sale, gross unrealized gains	32	26
Investment securities available for sale, gross unrealized losses	(2,899)	(1,173)
Investment securities available for sale, Estimated fair value	116,470	103,788
US States and Political Subdivisions Debt Securities [Member]
Investment securities available for sale, amortized cost	32,233	33,340
Investment securities available for sale, gross unrealized gains	92	482
Investment securities available for sale, gross unrealized losses	(615)	(144)
Investment securities available for sale, Estimated fair value	$ 31,710	$ 33,678

Note 3 - Investment Securitie26

Note 3 - Investment Securities Available for Sale - Investment Securities With Unrealized Losses (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Less than 12 months fair value	$ 92,764	$ 62,691
Less than 12 months unrealized losses	2,008	472
12 months or more fair value	32,817	34,616
12 months or more unrealized losses	1,506	845
Total fair value	125,581	97,307
Total unrealized losses	3,514	1,317
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Less than 12 months fair value	72,580	60,070
Less than 12 months unrealized losses	1,632	441
12 months or more fair value	29,541	31,213
12 months or more unrealized losses	1,267	732
Total fair value	102,121	91,283
Total unrealized losses	2,899	1,173
US States and Political Subdivisions Debt Securities [Member]
Less than 12 months fair value	20,184	2,621
Less than 12 months unrealized losses	376	31
12 months or more fair value	3,276	3,403
12 months or more unrealized losses	239	113
Total fair value	23,460	6,024
Total unrealized losses	$ 615	$ 144

Note 3 - Investment Securitie27

Note 3 - Investment Securities Available for Sale - Investment Securities by Contractual Maturity (Details) $ in Thousands	Mar. 31, 2018USD ($)
Within one year, amortized cost
Within one year, estimated fair value
After one year through five years, amortized cost	2,937
After one year through five years, estimated fair value	2,938
After five years through ten years, amortized cost	16,910
After five years through ten years, estimated fair value	16,682
After ten years, amortized cost	12,386
After ten years, estimated fair value	12,090
Amortized cost	151,570
Estimated fair value	148,180
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Government-sponsored mortgage-backed securities, amortized cost	119,337
Government-sponsored mortgage-backed securities, estimated fair value	$ 116,470

Note 4 - Loans and the Allowa28

Note 4 - Loans and the Allowance for Loan Losses (Details Textual)	3 Months Ended		12 Months Ended
	Mar. 31, 2018USD ($)	Mar. 31, 2017USD ($)	Dec. 31, 2017USD ($)
Impaired Financing Receivable, Recorded Investment, Total	$ 1,981,000		$ 2,270,000
Impaired Financing Receivable, Related Allowance	78,000		82,000
Impaired Financing Receivable, with Related Allowance, Recorded Investment	469,000		475,000
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	1,512,000		1,795,000
Impaired Financing Receivable, Average Recorded Investment, Total	2,002,000	$ 5,405,000	1,760,000
Impaired Financing Receivable, Interest Income, Accrual Method, Total	18,000	43,000	73,000
Impaired Financing Receivable, Interest Income, Cash Basis Method, Total	0	$ 0
Financing Receivable, Modifications, Recorded Investment	1,109,000		1,111,000
Financing Receivable Modifications Related Allowances	61,000		63,000
Loans and Leases Receivable, Impaired, Commitment to Lend	$ 0		0
Financing Receivable, Modifications, Number of Contracts	0	0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0
Financing Receivable, Recorded Investment, Nonaccrual Status	$ 941,000		$ 1,226,000
Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans	$ 15,000	$ 51,000
Number of Loans, 90 Days Past Due and Still Accruing	1		3
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	$ 77,000		$ 1,796,000
Deferred Loan Origination Costs	$ 498,000	$ 395,000

Note 4 - Loans and the Allowa29

Note 4 - Loans and the Allowance for Loan Losses - Outstanding Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Loans	$ 489,342	$ 486,634
Deferred loan costs, net	2,451	2,283
Allowance for loan losses	(6,622)	(6,669)	$ (6,743)	$ (6,549)
Total net loans	485,171	482,248
Commercial Portfolio Segment [Member] | Commercial Loans [Member]
Loans	41,899	39,620
Allowance for loan losses	(772)	(725)	(788)	(655)
Commercial Portfolio Segment [Member] | Agricultural Loans [Member]
Loans	55,861	58,908
Allowance for loan losses	(494)	(623)	(473)	(466)
Commercial Portfolio Segment [Member] | Real Estate Loan [Member]
Loans	243,781	240,257
Allowance for loan losses	(2,759)	(2,729)	(2,919)	(2,740)
Commercial Portfolio Segment [Member] | Construction Loans [Member]
Loans	26,465	25,181
Allowance for loan losses	(791)	(783)	(838)	(927)
Residential Portfolio Segment [Member] | Real Estate Loan [Member]
Loans	15,609	16,624
Allowance for loan losses	(212)	(231)	(268)	(280)
Residential Portfolio Segment [Member] | Equity Lines of Credit [Member]
Loans	39,534	41,798
Allowance for loan losses	(510)	(533)	(561)	(575)
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Loans	62,155	60,438
Allowance for loan losses	(977)	(946)	(806)	(815)
Consumer Portfolio Segment [Member] | Other Loans [Member]
Loans	4,038	3,808
Allowance for loan losses	$ (107)	$ (99)	$ (90)	$ (91)

Note 4 - Loans and the Allowa30

Note 4 - Loans and the Allowance for Loan Losses - Changes in the Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Balance, beginning of year	$ 6,669	$ 6,549	$ 6,549
Provision charged to operations	200	200	600
Losses charged to allowance	(449)	(55)	(879)
Recoveries	202	49	399
Balance, end of year	$ 6,622	$ 6,743	$ 6,669

Note 4 - Loans and the Allowa31

Note 4 - Loans and the Allowance for Loan Losses - Loan Portfolio Allocated by Internal Risk Ratings (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Loans	$ 489,342	$ 486,634
Commercial Portfolio Segment [Member] | Commercial Loans [Member]
Loans	41,899	39,620
Commercial Portfolio Segment [Member] | Agricultural Loans [Member]
Loans	55,861	58,908
Commercial Portfolio Segment [Member] | Real Estate Loan [Member]
Loans	243,781	240,257
Commercial Portfolio Segment [Member] | Construction Loans [Member]
Loans	26,465	25,181
Residential Portfolio Segment [Member] | Real Estate Loan [Member]
Loans	15,609	16,624
Residential Portfolio Segment [Member] | Equity Lines of Credit [Member]
Loans	39,534	41,798
Commercial and Residential Portfolio Segments [Member]
Loans	423,149	422,388
Pass [Member] | Commercial Portfolio Segment [Member] | Commercial Loans [Member]
Loans	41,363	38,851
Pass [Member] | Commercial Portfolio Segment [Member] | Agricultural Loans [Member]
Loans	55,530	56,859
Pass [Member] | Commercial Portfolio Segment [Member] | Real Estate Loan [Member]
Loans	240,025	239,944
Pass [Member] | Commercial Portfolio Segment [Member] | Construction Loans [Member]
Loans	26,367	25,081
Pass [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member]
Loans	15,323	16,218
Pass [Member] | Residential Portfolio Segment [Member] | Equity Lines of Credit [Member]
Loans	39,481	41,636
Pass [Member] | Commercial and Residential Portfolio Segments [Member]
Loans	418,089	418,589
Special Mention [Member] | Commercial Portfolio Segment [Member] | Commercial Loans [Member]
Loans	263	238
Special Mention [Member] | Commercial Portfolio Segment [Member] | Agricultural Loans [Member]
Loans	254	253
Special Mention [Member] | Commercial Portfolio Segment [Member] | Real Estate Loan [Member]
Loans	3,474	26
Special Mention [Member] | Commercial Portfolio Segment [Member] | Construction Loans [Member]
Loans
Special Mention [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member]
Loans	123	125
Special Mention [Member] | Residential Portfolio Segment [Member] | Equity Lines of Credit [Member]
Loans
Special Mention [Member] | Commercial and Residential Portfolio Segments [Member]
Loans	4,114	642
Substandard [Member] | Commercial Portfolio Segment [Member] | Commercial Loans [Member]
Loans	273	531
Substandard [Member] | Commercial Portfolio Segment [Member] | Agricultural Loans [Member]
Loans	77	1,796
Substandard [Member] | Commercial Portfolio Segment [Member] | Real Estate Loan [Member]
Loans	282	287
Substandard [Member] | Commercial Portfolio Segment [Member] | Construction Loans [Member]
Loans	98	100
Substandard [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member]
Loans	163	281
Substandard [Member] | Residential Portfolio Segment [Member] | Equity Lines of Credit [Member]
Loans	53	162
Substandard [Member] | Commercial and Residential Portfolio Segments [Member]
Loans	946	3,157
Doubtful [Member] | Commercial Portfolio Segment [Member] | Commercial Loans [Member]
Loans
Doubtful [Member] | Commercial Portfolio Segment [Member] | Agricultural Loans [Member]
Loans
Doubtful [Member] | Commercial Portfolio Segment [Member] | Real Estate Loan [Member]
Loans
Doubtful [Member] | Commercial Portfolio Segment [Member] | Construction Loans [Member]
Loans
Doubtful [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member]
Loans
Doubtful [Member] | Residential Portfolio Segment [Member] | Equity Lines of Credit [Member]
Loans
Doubtful [Member] | Commercial and Residential Portfolio Segments [Member]
Loans

Note 4 - Loans and the Allowa32

Note 4 - Loans and the Allowance for Loan Losses - Credit Risk Profile by Internally Assigned Grade (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Loans	$ 489,342	$ 486,634
Consumer Portfolio Segment [Member] | Performing Financial Instruments [Member]
Loans	65,848	63,848
Consumer Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Loans	345	398
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Loans	62,155	60,438
Consumer Portfolio Segment [Member] | Automobile Loan [Member] | Performing Financial Instruments [Member]
Loans	61,810	60,060
Consumer Portfolio Segment [Member] | Automobile Loan [Member] | Nonperforming Financial Instruments [Member]
Loans	345	378
Consumer Portfolio Segment [Member] | Other Loans [Member]
Loans	4,038	3,808
Consumer Portfolio Segment [Member] | Other Loans [Member] | Performing Financial Instruments [Member]
Loans	4,038	3,788
Consumer Portfolio Segment [Member] | Other Loans [Member] | Nonperforming Financial Instruments [Member]
Loans		20
Consumer Portfolio Segment [Member] | Residential Portfolio Segment [Member]
Loans	$ 66,193
Consumer Portfolio Segment [Member] | Commercial Portfolio Segment [Member]
Loans		$ 64,246

Note 4 - Loans and the Allowa33

Note 4 - Loans and the Allowance for Loan Losses - Allocation of the Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Mar. 31, 2018	Dec. 31, 2017
Balance, beginning of year	$ 6,669	$ 6,549	$ 6,549
Charge-offs	(449)	(55)	(879)
Recoveries	202	49	399
Provision	200	200	600
Balance, end of year	6,622	6,743	6,669
Allowance for loan losses, individually evaluated for impairment				$ 78	$ 82
Allowance for loan losses, collectively evaluated for impairment				6,544	6,587
Loans	489,342		486,634
Loans, individually evaluated for impairment				1,981	2,270
Loans, collectively evaluated for impairment				487,361	484,364
Loans	489,342		486,634	489,342	486,634
Commercial Portfolio Segment [Member] | Commercial Loans [Member]
Balance, beginning of year	725	655	655
Charge-offs	(265)
Recoveries	7	8
Provision	305	125
Balance, end of year	772	788	725
Allowance for loan losses, individually evaluated for impairment				2	2
Allowance for loan losses, collectively evaluated for impairment				770	723
Loans	41,899		39,620
Loans, individually evaluated for impairment				14	14
Loans, collectively evaluated for impairment				41,885	39,606
Loans	41,899		39,620	41,899	39,620
Commercial Portfolio Segment [Member] | Agricultural Loans [Member]
Balance, beginning of year	623	466	466
Charge-offs
Recoveries
Provision	(129)	7
Balance, end of year	494	473	623
Allowance for loan losses, individually evaluated for impairment
Allowance for loan losses, collectively evaluated for impairment				494	623
Loans	55,861		58,908
Loans, individually evaluated for impairment				254	253
Loans, collectively evaluated for impairment				55,607	58,655
Loans	55,861		58,908	55,861	58,908
Commercial Portfolio Segment [Member] | Real Estate Loan [Member]
Balance, beginning of year	2,729	2,740	2,740
Charge-offs
Recoveries	17	2
Provision	13	177
Balance, end of year	2,759	2,919	2,729
Allowance for loan losses, individually evaluated for impairment
Allowance for loan losses, collectively evaluated for impairment				2,759	2,729
Loans	243,781		240,257
Loans, individually evaluated for impairment				282	287
Loans, collectively evaluated for impairment				243,499	239,970
Loans	243,781		240,257	243,781	240,257
Commercial Portfolio Segment [Member] | Construction Loans [Member]
Balance, beginning of year	783	927	927
Charge-offs
Recoveries	2
Provision	6	(89)
Balance, end of year	791	838	783
Allowance for loan losses, individually evaluated for impairment				29	32
Allowance for loan losses, collectively evaluated for impairment				762	751
Loans	26,465		25,181
Loans, individually evaluated for impairment				220	224
Loans, collectively evaluated for impairment				26,245	24,957
Loans	26,465		25,181	26,465	25,181
Residential Portfolio Segment [Member] | Real Estate Loan [Member]
Balance, beginning of year	231	280	280
Charge-offs
Recoveries	91	1
Provision	(110)	(13)
Balance, end of year	212	268	231
Allowance for loan losses, individually evaluated for impairment				47	48
Allowance for loan losses, collectively evaluated for impairment				165	183
Loans	15,609		16,624
Loans, individually evaluated for impairment				813	934
Loans, collectively evaluated for impairment				14,796	15,690
Loans	15,609		16,624	15,609	16,624
Residential Portfolio Segment [Member] | Equity Lines of Credit [Member]
Balance, beginning of year	533	575	575
Charge-offs
Recoveries	1
Provision	(24)	(14)
Balance, end of year	510	561	533
Allowance for loan losses, individually evaluated for impairment
Allowance for loan losses, collectively evaluated for impairment				510	533
Loans	39,534		41,798
Loans, individually evaluated for impairment				53	162
Loans, collectively evaluated for impairment				39,481	41,636
Loans	39,534		41,798	39,534	41,798
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Balance, beginning of year	946	815	815
Charge-offs	(165)	(50)
Recoveries	82	34
Provision	114	7
Balance, end of year	977	806	946
Allowance for loan losses, individually evaluated for impairment
Allowance for loan losses, collectively evaluated for impairment				977	946
Loans	62,155		60,438
Loans, individually evaluated for impairment				345	377
Loans, collectively evaluated for impairment				61,810	60,061
Loans	62,155		60,438	62,155	60,438
Consumer Portfolio Segment [Member] | Other Loans [Member]
Balance, beginning of year	99	91	91
Charge-offs	(19)	(5)
Recoveries	2	4
Provision	25
Balance, end of year	107	$ 90	99
Allowance for loan losses, individually evaluated for impairment
Allowance for loan losses, collectively evaluated for impairment				107	99
Loans	4,038		3,808
Loans, individually evaluated for impairment					19
Loans, collectively evaluated for impairment				4,038	3,789
Loans	$ 4,038		$ 3,808	$ 4,038	$ 3,808

Note 4 - Loans and the Allowa34

Note 4 - Loans and the Allowance for Loan Losses - Aging Analysis of the Loan Portfolio (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Loans, past due	$ 5,003,000	$ 6,471,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	77,000	1,796,000
Financing Receivable, Recorded Investment, Nonaccrual Status	941,000	1,226,000
Loans, current	484,339,000	480,163,000
Loans	489,342,000	486,634,000
Loans, 90 days past due and still accruing	77,000	1,796,000
Financing Receivables 30 to 89 Days Past Due [Member]
Loans, past due	3,985,000	3,449,000
Commercial Portfolio Segment [Member] | Commercial Loans [Member]
Loans, past due	1,030,000	1,869,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Nonaccrual Status
Loans, current	40,869,000	37,751,000
Loans	41,899,000	39,620,000
Loans, 90 days past due and still accruing
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans, past due	1,030,000	1,869,000
Commercial Portfolio Segment [Member] | Agricultural Loans [Member]
Loans, past due	77,000	1,796,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	77,000	1,796,000
Financing Receivable, Recorded Investment, Nonaccrual Status
Loans, current	55,784,000	57,112,000
Loans	55,861,000	58,908,000
Loans, 90 days past due and still accruing	77,000	1,796,000
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans, past due
Commercial Portfolio Segment [Member] | Real Estate Loan [Member]
Loans, past due	1,548,000	287,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Nonaccrual Status	282,000	287,000
Loans, current	242,233,000	239,970,000
Loans	243,781,000	240,257,000
Loans, 90 days past due and still accruing
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans, past due	1,266,000
Commercial Portfolio Segment [Member] | Construction Loans [Member]
Loans, past due	98,000	138,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Nonaccrual Status	98,000	100,000
Loans, current	26,367,000	25,043,000
Loans	26,465,000	25,181,000
Loans, 90 days past due and still accruing
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans, past due		38,000
Residential Portfolio Segment [Member] | Real Estate Loan [Member]
Loans, past due	292,000	411,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Nonaccrual Status	163,000	281,000
Loans, current	15,317,000	16,213,000
Loans	15,609,000	16,624,000
Loans, 90 days past due and still accruing
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans, past due	129,000	130,000
Residential Portfolio Segment [Member] | Equity Lines of Credit [Member]
Loans, past due	493,000	507,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Nonaccrual Status	53,000	162,000
Loans, current	39,041,000	41,291,000
Loans	39,534,000	41,798,000
Loans, 90 days past due and still accruing
Residential Portfolio Segment [Member] | Equity Lines of Credit [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans, past due	440,000	345,000
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Loans, past due	1,428,000	1,424,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Nonaccrual Status	345,000	377,000
Loans, current	60,727,000	59,014,000
Loans	62,155,000	60,438,000
Loans, 90 days past due and still accruing
Consumer Portfolio Segment [Member] | Automobile Loan [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans, past due	1,083,000	1,047,000
Consumer Portfolio Segment [Member] | Other Loans [Member]
Loans, past due	37,000	39,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Nonaccrual Status		19,000
Loans, current	4,001,000	3,769,000
Loans	4,038,000	3,808,000
Loans, 90 days past due and still accruing
Consumer Portfolio Segment [Member] | Other Loans [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans, past due	$ 37,000	$ 20,000

Note 4 - Loans and the Allowa35

Note 4 - Loans and the Allowance for Loan Losses - Impaired Loans (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Recorded investment with no related allowance recorded	$ 1,512,000		$ 1,795,000
Recorded investment with an allowance	469,000		475,000
Impaired Financing Receivable, Related Allowance	78,000		82,000
Recorded investment	1,981,000		2,270,000
Unpaid principal balance	1,992,000		2,281,000
Average recorded investment	2,002,000	$ 5,405,000	1,760,000
Interest income recognized	18,000	$ 43,000	73,000
Commercial Portfolio Segment [Member] | Commercial Loans [Member]
Recorded investment with no related allowance recorded
Unpaid principal balance with no related allowance recorded
Average recorded investment with no related allowance recorded
Interest income recognized with no related allowance recorded
Recorded investment with an allowance	14,000		14,000
Unpaid principal balance with allowance	14,000		14,000
Impaired Financing Receivable, Related Allowance	2,000		2,000
Average recorded investment with an allowance	14,000		15,000
Interest income recognized with an allowance			1,000
Recorded investment	14,000		14,000
Unpaid principal balance	14,000		14,000
Average recorded investment	14,000		15,000
Interest income recognized			1,000
Commercial Portfolio Segment [Member] | Agricultural Loans [Member]
Recorded investment with no related allowance recorded	254,000		253,000
Unpaid principal balance with no related allowance recorded	254,000		253,000
Average recorded investment with no related allowance recorded	254,000		255,000
Interest income recognized with no related allowance recorded	5,000		19,000
Recorded investment with an allowance
Unpaid principal balance with allowance
Impaired Financing Receivable, Related Allowance
Average recorded investment with an allowance
Interest income recognized with an allowance
Recorded investment	254,000		253,000
Unpaid principal balance	254,000		253,000
Average recorded investment	254,000		255,000
Interest income recognized	5,000		19,000
Commercial Portfolio Segment [Member] | Real Estate Loan [Member]
Recorded investment with no related allowance recorded	282,000		287,000
Unpaid principal balance with no related allowance recorded	282,000		287,000
Average recorded investment with no related allowance recorded	285,000		184,000
Interest income recognized with no related allowance recorded
Recorded investment with an allowance
Unpaid principal balance with allowance
Impaired Financing Receivable, Related Allowance
Average recorded investment with an allowance
Interest income recognized with an allowance
Recorded investment	282,000		287,000
Unpaid principal balance	282,000		287,000
Average recorded investment	285,000		184,000
Interest income recognized
Commercial Portfolio Segment [Member] | Construction Loans [Member]
Recorded investment with no related allowance recorded
Unpaid principal balance with no related allowance recorded
Average recorded investment with no related allowance recorded
Interest income recognized with no related allowance recorded
Recorded investment with an allowance	220,000		224,000
Unpaid principal balance with allowance	220,000		224,000
Impaired Financing Receivable, Related Allowance	29,000		32,000
Average recorded investment with an allowance	222,000		230,000
Interest income recognized with an allowance	2,000		8,000
Recorded investment	220,000		224,000
Unpaid principal balance	220,000		224,000
Average recorded investment	222,000		230,000
Interest income recognized	2,000		8,000
Residential Portfolio Segment [Member] | Real Estate Loan [Member]
Recorded investment with no related allowance recorded	578,000		697,000
Unpaid principal balance with no related allowance recorded	589,000		708,000
Average recorded investment with no related allowance recorded	581,000		548,000
Interest income recognized with no related allowance recorded	9,000		38,000
Recorded investment with an allowance	235,000		237,000
Unpaid principal balance with allowance	235,000		237,000
Impaired Financing Receivable, Related Allowance	47,000		48,000
Average recorded investment with an allowance	236,000		203,000
Interest income recognized with an allowance	2,000		7,000
Recorded investment	813,000		934,000
Unpaid principal balance	824,000		945,000
Average recorded investment	817,000		751,000
Interest income recognized	11,000		45,000
Residential Portfolio Segment [Member] | Equity Lines of Credit [Member]
Recorded investment with no related allowance recorded	53,000		162,000
Unpaid principal balance with no related allowance recorded	53,000		162,000
Average recorded investment with no related allowance recorded	56,000		180,000
Interest income recognized with no related allowance recorded
Recorded investment with an allowance
Unpaid principal balance with allowance
Impaired Financing Receivable, Related Allowance
Average recorded investment with an allowance
Interest income recognized with an allowance
Recorded investment	53,000		162,000
Unpaid principal balance	53,000		162,000
Average recorded investment	56,000		180,000
Interest income recognized
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Recorded investment with no related allowance recorded	345,000		377,000
Unpaid principal balance with no related allowance recorded	345,000		377,000
Average recorded investment with no related allowance recorded	354,000		144,000
Interest income recognized with no related allowance recorded
Recorded investment with an allowance
Unpaid principal balance with allowance
Impaired Financing Receivable, Related Allowance
Average recorded investment with an allowance
Interest income recognized with an allowance
Recorded investment	345,000		377,000
Unpaid principal balance	345,000		377,000
Average recorded investment	354,000		144,000
Interest income recognized
Consumer Portfolio Segment [Member] | Other Loans [Member]
Recorded investment with no related allowance recorded			19,000
Unpaid principal balance with no related allowance recorded			19,000
Average recorded investment with no related allowance recorded			1,000
Interest income recognized with no related allowance recorded
Recorded investment with an allowance
Unpaid principal balance with allowance
Impaired Financing Receivable, Related Allowance
Average recorded investment with an allowance
Interest income recognized with an allowance
Recorded investment			19,000
Unpaid principal balance			19,000
Average recorded investment			1,000
Interest income recognized

Note 5 - Commitments and Cont36

Note 5 - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Unused Commitments to Extend Credit	$ 108,800	$ 107,400
Construction Loan Payable [Member]
Unused Commitments to Extend Credit	16,100
Standby Letters of Credit [Member]
Unused Commitments to Extend Credit	$ 477	$ 477

Note 6 - Earnings Per Share - C

Note 6 - Earnings Per Share - Calculation of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Net income	$ 3,280	$ 2,064
Basic earnings per common share (in dollars per share)	$ 0.65	$ 0.42
Diluted earnings per common share (in dollars per share)	$ 0.63	$ 0.40
Basic shares (in shares)	5,071	4,911
Diluted shares (in shares)	5,208	5,164

Note 7 - Stock-based Compensa38

Note 7 - Stock-based Compensation (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	$ 351,000	$ 424,000
Allocated Share-based Compensation Expense, Total	47,000	43,000
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	5,000	5,000
Proceeds from Stock Options Exercised	82,000	123,000
Employee Service Share-based Compensation, Tax Benefit from Exercise of Stock Options	$ 65,000	$ 45,000
Stock Option Plan 2001 [Member]
Common Stock, Capital Shares Reserved for Future Issuance	39,793
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	0
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total	$ 0
Stock Option Plan 2013 [Member]
Common Stock, Capital Shares Reserved for Future Issuance	453,800
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	230,400
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total	$ 641,000
Share-based Compensation Arrangement by Share Based Payment Award, Holding Period of Previously Owned Stock to be Used As Payment to Exercise Stock Options	180 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	76,000	0
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	3 years 36 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value	$ 84,000	$ 90,000
Stock Option Plan 2013 [Member] | Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	10 years

Note 7 - Stock-based Compensa39

Note 7 - Stock-based Compensation - Stock Option Activity (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Stock Option Plan 2001 [Member]
Options outstanding (in shares)	46,293
Options outstanding, weighted average exercise price (in dollars per share)	$ 2.95
Options exercised (in shares)	(6,500)
Options exercised, weighted average exercise price (in dollars per share)	$ 2.95
Options outstanding (in shares)	39,793
Options outstanding, weighted average exercise price (in dollars per share)	$ 2.95
Options outstanding, weighted average remaining contractual term (Year)	1 year
Options outstanding, intrinsic value	$ 873,000
Options exercisable (in shares)	39,793
Options exercisable, weighted average exercise price (in dollars per share)	$ 2.95
Options exercisable, weighted average remaining contractual term (Year)	1 year
Options exercisable, intrinsic value	$ 873,000
Stock Option Plan 2013 [Member]
Options outstanding (in shares)	160,600
Options outstanding, weighted average exercise price (in dollars per share)	$ 7.72
Options exercised (in shares)	(12,400)
Options exercised, weighted average exercise price (in dollars per share)	$ 7.50
Options outstanding (in shares)	223,400
Options outstanding, weighted average exercise price (in dollars per share)	$ 13.35
Options outstanding, weighted average remaining contractual term (Year)	6 years 36 days
Options outstanding, intrinsic value	$ 2,580,000
Options exercisable (in shares)	79,200
Options exercisable, weighted average exercise price (in dollars per share)	$ 7.54
Options exercisable, weighted average remaining contractual term (Year)	5 years
Options exercisable, intrinsic value	$ 1,375,000
Options granted (in shares)	76,000	0
Options granted, weighted average exercise price (in dollars per share)	$ 24.40
Options cancelled (in shares)	(800)
Options cancelled, weighted average exercise price (in dollars per share)	$ 24.40
Options expected to vest (in shares)	128,492
Options expected to vest, weighted average exercise price (in dollars per share)	$ 16.54
Options expected to vest, weighted average remaining contractual term (Year)	6 years 255 days
Options expected to vest, intrinsic value	$ 1,074,000

Note 7 - Stock-based Compensa40

Note 7 - Stock-based Compensation - Weighted Average Fair Value Assumptions (Details)	3 Months Ended
	Mar. 31, 2018$ / shares
Weighted-average fair value of options granted during the three months ended March 31, 2018 (in dollars per share)	$ 6.54
Employee Stock Option [Member]
Expected life of stock options (in years) (Year)	5 years 36 days
Risk free interest rate	2.38%
Volatility	30.40%
Dividend yields	1.39%

Note 8 - Income Taxes (Details

Note 8 - Income Taxes (Details Textual) $ in Thousands	Mar. 31, 2018USD ($)
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	$ 0

Note 9 - Fair Value Measureme42

Note 9 - Fair Value Measurement (Details Textual) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Gain (Loss) on Sale of Assets and Asset Impairment Charges	$ 3,000	$ (9,000)
Impaired Loans [Member]
Gain (Loss) on Sale of Assets and Asset Impairment Charges	$ 3,000	$ (9,000)

Note 9 - Fair Value Measureme43

Note 9 - Fair Value Measurement - Carrying Amounts and Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Estimated fair value	$ 148,180
Reported Value Measurement [Member]
Cash and cash equivalents	64,690	$ 87,537
Estimated fair value	148,180	137,466
Loans, net	485,171	482,248
FHLB stock	2,685	2,685
Accrued interest receivable	2,460	2,582
Deposits	652,791	662,657
Repurchase agreements	8,675	10,074
Junior subordinated deferrable interest debentures	10,310	10,310
Accrued interest payable	65	64
Estimate of Fair Value Measurement [Member]
Cash and cash equivalents	64,690	87,537
Estimated fair value	148,180	137,466
Loans, net	486,517	484,269
Accrued interest receivable	2,460	2,582
Deposits	652,809	662,678
Repurchase agreements	8,675	10,074
Junior subordinated deferrable interest debentures	8,065	7,829
Accrued interest payable	65	64
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Cash and cash equivalents	64,690	87,537
Accrued interest receivable	34	31
Deposits	610,354	616,617
Accrued interest payable	10	10
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Estimated fair value	148,180	137,466
Accrued interest receivable	501	522
Deposits	42,455	46,061
Repurchase agreements	8,675	10,074
Accrued interest payable	38	39
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Loans, net	486,517	484,269
Accrued interest receivable	1,925	2,029
Junior subordinated deferrable interest debentures	8,065	7,829
Accrued interest payable	$ 17	$ 15

Note 9 - Fair Value Measureme44

Note 9 - Fair Value Measurement - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale	$ 148,180	$ 137,466
Fair Value, Measurements, Recurring [Member]
Assets	148,180	137,466
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Assets	148,180	137,466
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Debt Securities, Available-for-sale	116,470	103,788
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Measurements, Recurring [Member]
Debt Securities, Available-for-sale	116,470	103,788
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Debt Securities, Available-for-sale	116,470	103,788
US States and Political Subdivisions Debt Securities [Member]
Debt Securities, Available-for-sale	31,710	33,678
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Debt Securities, Available-for-sale	31,710	33,678
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Debt Securities, Available-for-sale	$ 31,710	$ 33,678

Note 9 - Fair Value Measureme45

Note 9 - Fair Value Measurement - Assets and Liabilities Measured at Fair Value on a Non-recurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Impaired loans, Total gain (loss)	$ 3
Other real estate, Total gain (loss)		(9)
Asset, Total gain (loss)	3	(9)
Commercial Portfolio Segment [Member] | Construction Loans [Member]
Impaired loans, Total gain (loss)	3
Other real estate, Total gain (loss)
Commercial Portfolio Segment [Member] | Real Estate Loan [Member]
Other real estate, Total gain (loss)		(9)
Residential Portfolio Segment [Member] | Real Estate Loan [Member]
Other real estate, Total gain (loss)
Residential Portfolio Segment [Member] | Equity Lines of Credit [Member]
Other real estate, Total gain (loss)
Fair Value, Measurements, Nonrecurring [Member]
Impaired loans	82	80
Other real estate	1,081	1,344
Assets	1,163	1,424
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans	82	80
Other real estate	1,081	1,344
Assets	1,163	1,424
Fair Value, Measurements, Nonrecurring [Member] | Commercial Portfolio Segment [Member] | Construction Loans [Member]
Impaired loans	82	80
Other real estate	592	969
Fair Value, Measurements, Nonrecurring [Member] | Commercial Portfolio Segment [Member] | Construction Loans [Member] | Fair Value, Inputs, Level 1 [Member]
Impaired loans
Other real estate
Fair Value, Measurements, Nonrecurring [Member] | Commercial Portfolio Segment [Member] | Construction Loans [Member] | Fair Value, Inputs, Level 2 [Member]
Impaired loans
Other real estate
Fair Value, Measurements, Nonrecurring [Member] | Commercial Portfolio Segment [Member] | Construction Loans [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans	82	80
Other real estate	592	969
Fair Value, Measurements, Nonrecurring [Member] | Commercial Portfolio Segment [Member] | Real Estate Loan [Member]
Other real estate	285	285
Fair Value, Measurements, Nonrecurring [Member] | Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Fair Value, Inputs, Level 3 [Member]
Other real estate	285	285
Fair Value, Measurements, Nonrecurring [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member]
Other real estate	114
Fair Value, Measurements, Nonrecurring [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Fair Value, Inputs, Level 3 [Member]
Other real estate	114
Fair Value, Measurements, Nonrecurring [Member] | Residential Portfolio Segment [Member] | Equity Lines of Credit [Member]
Other real estate	90	90
Fair Value, Measurements, Nonrecurring [Member] | Residential Portfolio Segment [Member] | Equity Lines of Credit [Member] | Fair Value, Inputs, Level 3 [Member]
Other real estate	$ 90	$ 90

Note 9 - Fair Value Measureme46

Note 9 - Fair Value Measurement - Quantitative Information About Level 3 Fair Value Measurements for Financial Instruments Measured at Fair Value on a Non-recurring Basis (Details) $ in Thousands	Mar. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Fair Value, Measurements, Nonrecurring [Member]
Impaired loans	$ 82	$ 80
Other real estate	$ 1,081	$ 1,344
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Maximum [Member] | Measurement Input, Cost to Sell [Member]
Impaired loans, Measurement Input	8	8
Other real estate, Measurement Input	10	10
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Weighted Average [Member]
Other real estate, Measurement Input		10
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Weighted Average [Member] | Measurement Input, Cost to Sell [Member]
Impaired loans, Measurement Input	8	8
Other real estate, Measurement Input	10
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Fair Value, Measurements, Nonrecurring [Member]
Impaired loans	$ 82	$ 80
Other real estate	$ 592	$ 969
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Maximum [Member] | Measurement Input, Cost to Sell [Member]
Other real estate, Measurement Input	31	31
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Weighted Average [Member] | Measurement Input, Cost to Sell [Member]
Other real estate, Measurement Input	22	22
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Minimum [Member] | Measurement Input, Cost to Sell [Member]
Other real estate, Measurement Input	17	17
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Fair Value, Measurements, Nonrecurring [Member]
Other real estate	$ 285	$ 285
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Fair Value, Measurements, Nonrecurring [Member] | Impaired Loans [Member]
Other real estate	$ 285
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Maximum [Member] | Measurement Input, Cost to Sell [Member]
Other real estate, Measurement Input	10
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Weighted Average [Member] | Measurement Input, Cost to Sell [Member]
Other real estate, Measurement Input	10
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Fair Value, Measurements, Nonrecurring [Member]
Other real estate	$ 114
Residential Portfolio Segment [Member] | Equity Lines of Credit [Member] | Maximum [Member] | Measurement Input, Cost to Sell [Member]
Other real estate, Measurement Input	10	10
Residential Portfolio Segment [Member] | Equity Lines of Credit [Member] | Weighted Average [Member] | Measurement Input, Cost to Sell [Member]
Other real estate, Measurement Input	10	10
Residential Portfolio Segment [Member] | Equity Lines of Credit [Member] | Fair Value, Measurements, Nonrecurring [Member]
Other real estate	$ 90	$ 90