Plumas Bancorp (PLBC) 10-Q 7 Nov 18 2018 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Oct. 31, 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 Emerging Growth Company	false
Entity Small Business	true
Entity Common Stock, Shares Outstanding (in shares)		5,125,476
Document Type	10-Q
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3
Amendment Flag	false

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets
Cash and cash equivalents	$ 35,256	$ 87,537
Investment securities available for sale	156,734	137,466
Loans, less allowance for loan losses of $6,846 at September 30, 2018 and $6,669 at December 31, 2017	535,998	482,248
Real estate acquired through foreclosure	1,088	1,344
Premises and equipment, net	13,748	11,346
Bank owned life insurance	12,774	12,866
Accrued interest receivable and other assets	15,150	12,620
Total assets	770,748	745,427
Deposits:
Non-interest bearing	289,859	282,239
Interest bearing	392,983	380,418
Total deposits	682,842	662,657
Repurchase agreements	8,210	10,074
Accrued interest payable and other liabilities	7,020	6,686
Junior subordinated deferrable interest debentures	10,310	10,310
Total liabilities	708,382	689,727
Commitments and contingencies (Note 5)
Shareholders’ equity:
Common stock, no par value; 22,500,000 shares authorized; issued and outstanding – 5,125,476 shares at September 30, 2018 and 5,064,972 at December 31, 2017	6,854	6,415
Retained earnings	59,357	49,855
Accumulated other comprehensive loss, net	(3,845)	(570)
Total shareholders’ equity	62,366	55,700
Total liabilities and shareholders’ equity	$ 770,748	$ 745,427

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ / shares in Thousands, $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Loans, allowance for loan losses	$ 6,846	$ 6,669
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	22,500,000	22,500,000
Common stock, shares outstanding (in shares)	5,125,476	5,064,972
Common stock, shares issued (in shares)	5,125,476	5,064,972

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Interest Income:
Interest and fees on loans	$ 7,693	$ 6,560	$ 21,680	$ 19,101
Interest on investment securities	1,037	618	2,873	1,782
Other	113	223	402	402
Total interest income	8,843	7,401	24,955	21,285
Interest Expense:
Interest on deposits	159	149	462	429
Interest on note payable				28
Interest on junior subordinated deferrable interest debentures	131	103	370	295
Other	2	1	5	4
Total interest expense	292	253	837	756
Net interest income before provision for loan losses	8,551	7,148	24,118	20,529
Provision for Loan Losses	300	200	800	600
Net interest income after provision for loan losses	8,251	6,948	23,318	19,929
Non-Interest Income:
Service charges	628	617	1,919	1,841
Interchange revenue	572	521	1,619	1,470
Gain on sale of loans	564	557	1,763	1,870
Gain on equity securities with no readily determinable fair value			209
Loss on sale of investments			(8)	(17)
Other	520	488	1,538	1,449
Total non-interest income	2,284	2,183	7,040	6,613
Non-Interest Expenses:
Salaries and employee benefits	3,049	2,822	9,086	8,613
Occupancy and equipment	721	713	2,127	2,136
Other	1,658	1,597	4,893	4,357
Total non-interest expenses	5,428	5,132	16,106	15,106
Income before provision for income taxes	5,107	3,999	14,252	11,436
Provision for Income Taxes	1,411	1,551	3,830	4,383
Net income	$ 3,696	$ 2,448	$ 10,422	$ 7,053
Basic earnings per share (in dollars per share)	$ 0.72	$ 0.48	$ 2.04	$ 1.41
Diluted earnings per share (in dollars per share)	$ 0.71	$ 0.47	$ 2	$ 1.36

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net income	$ 3,696	$ 2,448	$ 10,422	$ 7,053
Other comprehensive income:
Change in net unrealized gain/loss	(1,285)	139	(4,657)	1,422
Reclassification adjustments for net losses included in net income			8	17
Net unrealized holding (loss) gain	(1,285)	139	(4,649)	1,439
Related tax effect:
Change in net unrealized gain/loss	380	(57)	1,376	(586)
Reclassification of net losses included in net income			(2)	(7)
Income tax effect	380	(57)	1,374	(593)
Other comprehensive (loss) income	(905)	82	(3,275)	846
Total comprehensive income	$ 2,791	$ 2,530	$ 7,147	$ 7,899

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash Flows from Operating Activities:
Net income	$ 10,422,000	$ 7,053,000
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for Loan Losses	800,000	600,000
Change in deferred loan origination costs/fees, net	(1,232,000)	(636,000)
Depreciation and amortization	749,000	775,000
Stock-based compensation expense	148,000	122,000
Loss on sale of investments	8,000	17,000
Amortization of investment security premiums	518,000	451,000
Gain on equity securities with no readily determinable fair value	(209,000)
Gain on sale of OREO and other vehicles	(80,000)	(15,000)
Gain on sale of loans held for sale	(1,763,000)	(1,870,000)
Loans originated for sale	(34,289,000)	(27,236,000)
Proceeds from loan sales	37,327,000	31,435,000
Provision from change in OREO valuation	38,000	106,000
Earnings on bank-owned life insurance	(246,000)	(253,000)
Increase in accrued interest receivable and other assets	(74,000)	(1,081,000)
Increase (decrease) in accrued interest payable and other liabilities	334,000	(783,000)
Net cash provided by operating activities	12,451,000	8,685,000
Cash Flows from Investing Activities:
Proceeds from principal repayments from available-for-sale government-sponsored mortgage-backed securities	11,349,000	9,387,000
Purchases of available-for-sale securities	(40,286,000)	(27,811,000)
Proceeds from sale of available-for-sale securities	4,157,000	4,221,000
Net increase in loans	(55,871,000)	(21,454,000)
Proceeds from Bank owned life insurance	338,000
Proceeds from sale of OREO	568,000	83,000
Proceeds from sale of other vehicles	400,000	171,000
Purchase of premises and equipment	(3,079,000)	(226,000)
Net cash used in investing activities	(82,424,000)	(35,629,000)
Cash Flows from Financing Activities:
Net increase in demand, interest bearing and savings deposits	26,307,000	70,314,000
Net decrease in time deposits	(6,122,000)	(2,817,000)
Principal payment on note payable		(2,375,000)
Net (decrease) increase in securities sold under agreements to repurchase	(1,864,000)	1,172,000
Cash dividends paid on common stock	(920,000)	(691,000)
Proceeds from exercise of stock options	291,000	226,000
Net cash provided by financing activities	17,692,000	65,829,000
(Decrease) increase in cash and cash equivalents	(52,281,000)	38,885,000
Cash and Cash Equivalents at Beginning of Year	87,537,000	62,646,000
Cash and Cash Equivalents at End of Period	35,256,000	101,531,000
Supplemental Disclosure of Cash Flow Information:
Interest expense	842,000	757,000
Income taxes	3,336,000	5,220,000
Non-Cash Investing Activities:
Real estate and vehicles acquired through foreclosure	646,000	475,000
Non-Cash Financing Activities:
Common stock retired in connection with the exercise of stock options	29,000	10,000
Common stock issued in connection with the cashless exercise of stock warrant		$ 787,000

Note 1 - The Business of Plumas

Note 1 - The Business of Plumas Bancorp	9 Months Ended
	Sep. 30, 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	9 Months Ended
	Sep. 30, 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 September 30, 2018 three nine September 30, 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 nine September 30, 2018 may not Reclassifications Certain reclassifications have been made to prior years’ balances to conform to the classifications used in 2018. 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% 2017 $1.4 no nine September 30, 2018. Recently Adopted Accounting Pronouncements In February 2018, No. 2018 02, No. 2018 02 December 22, 2017, 2017 $94,000. In May 2014, No. 2014 09 2014 09” January 1, 2018. 2014 09 not not 2014 09. 2014 09, not not 2014 09 not not On January 5, 2016, No. 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 In August 2018, No. 2018 13, December 15, 2019, No. 2018 13 not In July 2018, No. 2018 11, No. 2018 11 No. 2016 02. 2018 11: 1 may not 2 may not 2016 02 January 1, 2019 2018 11 not

Note 3 - Investment Securities

Note 3 - Investment Securities Available for Sale	9 Months Ended
	Sep. 30, 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 September 30, 2018 December 31, 2017 Available-for-Sale September 30, 2018 Gross Gross Amortized Unrealized Unrealized Fair Cost Gains Losses Value Debt securities: U.S. Government-sponsored agencies collateralized by mortgage obligations- residential $ 125,168 $ - $ (4,498 ) $ 120,670 Obligations of states and political subdivisions 37,024 32 (992 ) 36,064 $ 162,192 $ 32 $ (5,490 ) $ 156,734 Net unrealized loss on available-for-sale investment securities totaling $5,458,000 $1,613,000 September 30, 2018. nine September 30, 2018 eighteen $4,157,000 $8,000 eight $4,000 ten $12,000. No three September 30, 2018. 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. nine September 30, 2017 seven $4,221,000 $17,000 four $4,000 three $21,000. No three September 30, 2017. There were no nine September 30, 2018 twelve December 31, 2017. no September 30, 2018 December 31, 2017. Investment securities with unrealized losses at September 30, 2018 December 31, 2017 September 30, 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 $ 75,524 $ 2,103 $ 45,146 $ 2,395 $ 120,670 $ 4,498 Obligations of states and political subdivisions 27,704 632 4,697 360 32,401 992 $ 103,228 $ 2,735 $ 49,843 $ 2,755 $ 153,071 $ 5,490 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 September 30, 2018, 203 188 126 twelve 203 89 114 September 30, 2018, not not not September 30, 2018 The amortized cost and estimated fair value of investment securities at September 30, 2018 Amortized Cost Estimated Fair Value Within one year $ - $ - After one year through five years 3,060 3,029 After five years through ten years 17,299 16,906 After ten years 16,665 16,129 Investment securities not due at a single maturity date: Government-sponsored mortgage-backed securities 125,168 120,670 $ 162,192 $ 156,734 Expected maturities will differ from contractual maturities because the issuers of the securities may Investment securities with amortized costs totaling $87,579,000 $82,059,000 $84,152,000 $81,006,000 September 30, 2018 December 31, 2017,

Note 4 - Loans and the Allowanc

Note 4 - Loans and the Allowance for Loan Losses	9 Months Ended
	Sep. 30, 2018
Notes to Financial Statements
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]	4. Outstanding loans are summarized below, in thousands: September 30, December 31, 2018 2017 Commercial $ 46,762 $ 39,620 Agricultural 70,917 58,908 Real estate – residential 15,674 16,624 Real estate – commercial 253,154 240,257 Real estate – construction and land development 38,454 25,181 Equity lines of credit 39,165 41,798 Auto 71,875 60,438 Other 3,846 3,808 Total loans 539,847 486,634 Deferred loan costs, net 2,997 2,283 Allowance for loan losses (6,846 ) (6,669 ) Total net loans $ 535,998 $ 482,248 Changes in the allowance for loan losses, in thousands, were as follows: September 30, December 31, 2018 2017 Balance, beginning of year $ 6,669 $ 6,549 Provision charged to operations 800 600 Losses charged to allowance (988 ) (879 ) Recoveries 365 399 Balance, end of period $ 6,846 $ 6,669 The recorded investment in impaired loans totaled $2,332,000 $2,270,000 September 30, 2018 December 31, 2017, $79,000 $554,000 September 30, 2018 $82,000 $475,000 December 31, 2017. no $1,778,000 $1,795,000 September 30, 2018 December 31, 2017, nine September 30, 2018 September 30, 2017 $1,738,000 $4,982,000, $56,000 $100,000 nine September 30, 2018 2017, No nine September 30, 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 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 September 30, 2018 December 31, 2017 $1,089,000 $1,111,000, $54,000 $63,000 September 30, 2018 December 31, 2017. not September 30, 2018 December 31, 2017. There were no nine September 30, 2018 September 30, 2017. no twelve nine September 30, 2018 2017, At September 30, 2018 December 31, 2017, $1,244,000 $1,226,000, $36,000 $141,000 nine September 30, 2018 2017, $7,000 $52,000 three September 30, 2018 2017, December 31, 2017 three one $1.8 90 December 31, 2017. Salaries and employee benefits totaling $1,937,000 $1,393,000 nine September 30, 2018 2017, $703,000 $457,000 three September 30, 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: September 30 , 201 8 Commercial Credit Exposure Credit Risk Profile by Internally Assigned Grade Grade: Commercial Agricultural Real Estate- Residential Real Estate- Commercial Real Estate- Construction Equity LOC Total Pass $ 46,184 $ 70,664 $ 15,260 $ 249,576 $ 38,360 $ 38,724 $ 458,768 Special Mention 544 253 120 3,447 - - 4,364 Substandard 34 - 294 131 94 441 994 Doubtful - - - - - - - Total $ 46,762 $ 70,917 $ 15,674 $ 253,154 $ 38,454 $ 39,165 $ 464,126 December 31, 201 7 Commercial Credit Exposure Credit Risk Profile by Internally Assigned Grade Grade: Commercial Agricultural Real Estate- Residential Real Estate- Commercial Real Estate- Construction Equity LOC Total 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 September 30 , 201 8 December 31, 201 7 Auto Other Total Auto Other Total Grade: Performing $ 71,596 $ 3,841 $ 75,437 $ 60,060 $ 3,788 $ 63,848 Non-performing 279 5 284 378 20 398 Total $ 71,875 $ 3,846 $ 75,721 $ 60,438 $ 3,808 $ 64,246 The following tables show the allocation of the allowance for loan losses at the dates indicated, in thousands: Nine months en ded 9 /30/1 Commercial Agricultural Real Estat Residential Real Estate- Commercial Real Estate- Construction Equity LOC Auto Other Total Allowance for Loan Losses Beginning balance $ 725 $ 623 $ 231 $ 2,729 $ 783 $ 533 $ 946 $ 99 $ 6,669 Charge-offs (325 ) - - - - - (628 ) (35 ) (988 ) Recoveries 23 - 93 19 3 4 213 10 365 Provision 345 (26 ) (124 ) (124 ) 122 (48 ) 635 20 800 Ending balance $ 768 $ 597 $ 200 $ 2,624 $ 908 $ 489 $ 1,166 $ 94 $ 6,846 Three months ended 9 /30/18: Allowance for Loan Losses Beginning balance $ 853 $ 546 $ 195 $ 2,699 $ 780 $ 481 $ 1,044 $ 100 $ 6,698 Charge-offs (59 ) - - - - - (152 ) (14 ) (225 ) Recoveries 8 - 2 1 1 1 58 2 73 Provision (34 ) 51 3 (76 ) 127 7 216 6 300 Ending balance $ 768 $ 597 $ 200 $ 2,624 $ 908 $ 489 $ 1,166 $ 94 $ 6,846 Nine months ended 9 /30/17: Allowance for Loan Losses Beginning balance $ 655 $ 466 $ 280 $ 2,740 $ 927 $ 575 $ 815 $ 91 $ 6,549 Charge-offs (179 ) - - - - (5 ) (295 ) (35 ) (514 ) Recoveries 46 - 3 4 - 3 123 8 187 Provision 108 95 (47 ) 39 64 77 233 31 600 Ending balance $ 630 $ 561 $ 236 $ 2,783 $ 991 $ 650 $ 876 $ 95 $ 6,822 Three months ended 9 /30/17: Allowance for Loan Losses Beginning balance $ 705 $ 514 $ 252 $ 2,812 $ 1,071 $ 561 $ 845 $ 95 $ 6,855 Charge-offs (112 ) - - - - (5 ) (205 ) (17 ) (339 ) Recoveries 27 - 1 1 - 1 73 3 106 Provision 10 47 (17 ) (30 ) (80 ) 93 163 14 200 Ending balance $ 630 $ 561 $ 236 $ 2,783 $ 991 $ 650 $ 876 $ 95 $ 6,822 September 30, 2018: Allowance for Loan Losses Ending balance: individually evaluated for impairment $ - $ - $ 42 $ - $ 12 $ 25 $ - $ - $ 79 Ending balance: collectively evaluated for impairment $ 768 $ 597 $ 158 $ 2,624 $ 896 $ 464 $ 1,166 $ 94 $ 6,767 Loans Ending balance $ 46,762 $ 70,917 $ 15,674 $ 253,154 $ 38,454 $ 39,165 $ 71,875 $ 3,846 $ 539,847 Ending balance: individually evaluated for impairment $ 14 $ 253 $ 997 $ 131 $ 213 $ 441 $ 279 $ 4 $ 2,332 Ending balance: collectively evaluated for impairment $ 46,748 $ 70,664 $ 14,677 $ 253,023 $ 38,241 $ 38,724 $ 71,596 $ 3,842 $ 537,515 December 31, 2017: 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 September 30 , 201 8 30-89 Days 90 Days and Still Past Due and Past Due Accruing Nonaccrual Nonaccrual Current Total Commercial $ 16 $ - $ - $ 16 $ 46,746 $ 46,762 Agricultural 647 - - 647 70,270 70,917 Real estate – residential 157 - 294 451 15,223 15,674 Real estate – commercial - - 131 131 253,023 253,154 Real estate - construction & land - - 94 94 38,360 38,454 Equity Lines of Credit 227 - 441 668 38,497 39,165 Auto 1,128 - 280 1,408 70,467 71,875 Other 25 - 4 29 3,817 3,846 Total $ 2,200 $ - $ 1,244 $ 3,444 $ 536,403 $ 539,847 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 September 30 , 201 8 : Investment Balance Allowance Investment Recognized With no related allowance recorded: Commercial $ 14 $ 14 $ 14 $ 1 Agricultural 253 264 253 14 Real estate – residential 817 817 688 30 Real estate – commercial 131 131 136 - Real estate – construction & land 94 94 97 - Equity Lines of Credit 186 186 48 - Auto 279 279 196 - Other 4 4 1 - With an allowance recorded: Commercial $ - $ - $ - $ - $ - Agricultural - - - - - Real estate – residential 180 180 42 181 5 Real estate – commercial - - - - - Real estate – construction & land 119 119 12 121 6 Equity Lines of Credit 255 255 25 3 - Auto - - - - - Other - - - - - Total: Commercial $ 14 $ 14 $ - $ 14 $ 1 Agricultural 253 264 - 253 14 Real estate – residential 997 997 42 869 35 Real estate – commercial 131 131 - 136 - Real estate – construction & land 213 213 12 218 6 Equity Lines of Credit 441 441 25 51 - Auto 279 279 - 196 - Other 4 4 - 1 - Total $ 2,332 $ 2,343 $ 79 $ 1,738 $ 56 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	9 Months Ended
	Sep. 30, 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 $131.2 $107.4 $417 $477 September 30, 2018 December 31, 2017, Of the loan commitments outstanding at September 30, 2018, $37.7 twelve not may Stand-by letters of credit are conditional commitments written to guarantee the performance of a customer to a third not September 30, 2018 December 31, 2017.

Note 6 - Earnings Per Share

Note 6 - Earnings Per Share	9 Months Ended
	Sep. 30, 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 For the Nine Months Ended September 30, Ended September 30, (In thousands, except per share data) 2018 2017 2018 2017 Net Income: Net income $ 3,696 $ 2,448 $ 10,422 $ 7,053 Earnings Per Share: Basic earnings per share $ 0.72 $ 0.48 $ 2.04 $ 1.41 Diluted earnings per share $ 0.71 $ 0.47 $ 2.00 $ 1.36 Weighted Average Number of Shares Outstanding: Basic shares 5,122 5,048 5,100 4,987 Diluted shares 5,225 5,192 5,219 5,181 Shares of common stock issuable under stock options for which the exercise prices were greater than the average market prices were not not not 71,000 0 three September 30, 2018 2017, not not 71,000 0 nine September 30, 2018 2017,

Note 7 - Stock-based Compensati

Note 7 - Stock-based Compensation	9 Months Ended
	Sep. 30, 2018
Notes to Financial Statements
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]	7. Stock Options In 2001, 16,793 no September 30, 2018. As of September 30, 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 (29,500 ) 2.95 Options outstanding at September 30, 2018 16,793 $ 2.95 0.5 $ 368,000 Options exercisable at September 30, 2018 16,793 $ 2.95 0.5 $ 368,000 In May 2013, 2013 434,000 236,100 September 30, 2018. may not six not ten During the nine September 30, 2018 76,000 No nine September 30, 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 nine months ended September 30, 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 (6,500 ) 20.55 Options exercised (32,200 ) 7.23 Options outstanding at September 30, 2018 197,900 $ 13.79 5.7 $ 2,189,000 Options exercisable at September 30, 2018 81,200 $ 7.33 4.3 $ 1,423,000 Expected to vest after September 30, 2018 103,583 $ 18.28 6.6 $ 680,000 As of September 30, 2018, $506,000 2.7 The total fair value of options vested during the nine September 30, 2018 2017 $150,000 $161,000, two $1,261,000 $674,000 nine September 30, 2018 2017, Compensation cost related to stock options recognized in operating results under the stock option plans was $148,000 $122,000 nine September 30, 2018 2017, $10,000 nine September 30, 2018 $11,000 nine September 30, 2017. $50,000 $35,000 three September 30, 2018 2017, $3,000 three September 30, 2018 $4,000 three September 30, 2017. Cash received from option exercises under the plans for the nine September 30, 2018 2017 $291,000 $226,000, $99,000 $52,000 nine September 30, 2018 2017,

Note 8 - Income Taxes

Note 8 - Income Taxes	9 Months Ended
	Sep. 30, 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 September 30, 2018.

Note 9 - Fair Value Measurement

Note 9 - Fair Value Measurement	9 Months Ended
	Sep. 30, 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 September 30, 2018 3 2017 10 September 30, 2018. 2016 01. Fair Value of Financial Instruments The carrying amounts and estimated fair values of financial instruments, at September 30, 2018 Fair Value Measurements at September 30, 2018 Using: Carrying Value Level 1 Level 2 Level 3 Total Fair Value Financial assets: Cash and cash equivalents $ 35,256 $ 35,256 $ 35,256 Investment securities 156,734 $ 156,734 156,734 Loans, net 535,998 $ 540,632 540,632 FHLB stock 3,027 N/A Accrued interest receivable 2,888 3 573 2,312 2,888 Financial liabilities: Deposits 682,842 642,924 39,883 682,807 Repurchase agreements 8,210 8,210 8,210 Junior subordinated deferrable interest debentures 10,310 7,744 7,744 Accrued interest payable 59 10 34 15 59 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 September 30, 2018 December 31, 2017, Assets and liabilities measured at fair value on a recurring basis at September 30, 2018 Fair Value Measurements at September 30, 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 $ 120,670 $ - $ 120,670 $ - Obligations of states and political subdivisions 36,064 36,064 $ 156,734 $ - $ 156,734 $ - 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 September 30, 2018 Fair Value Measurements at September 30, 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 (Losses) Nine Months Ended September 30, 2018 Assets: Impaired loans: Equity lines of credit $ 231 $ - $ - $ 231 $ (25 ) Total impaired loans $ 231 $ - $ - $ 231 $ (25 ) Other real estate: Real estate – residential 76 - - 76 (38 ) Real estate – commercial 440 - - 440 - Construction and land 572 - - 572 - Total other real estate 1,088 - - 1,088 (38 ) $ 1,319 $ - $ - $ 1,319 $ (63 ) 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 Gains (Losses) Nine Months Ended September 30, 2017 Assets: Impaired loans: Real estate – commercial $ - $ - $ - $ - $ 7 Construction and land 80 - - 80 - Equity lines of credit - - - - (115 ) Total impaired loans 80 - - 80 (108 ) Other real estate: Real estate – residential - - - - (2 ) Real estate – commercial 285 - - 285 (9 ) Construction and land 969 - - 969 (95 ) Equity lines of credit 90 - - 90 - Total other real estate 1,344 - - 1,344 (106 ) $ 1,424 $ - $ - $ 1,424 $ (214 ) The Company has no The following methods were used to estimate fair value. Collateral-Dependent Impaired Loans: not third 3 25,000 108,000 nine September 30, 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 September 30, 2018 December 31, 2017 ( Description Fair Value 9/30/2018 Fair Value 12/31/2017 Valuation Technique Significant Unobservable Input Range (Weighted Average) 9/30/2018 Range (Weighted Average) 12/31/2017 Impaired Loans: Construction and land $ - $ 80 Third Party appraisals Management Adjustments to Reflect Current Conditions and Selling Costs 8% (8%) Equity Lines of Credit 231 - Third Party appraisals Management Adjustments to Reflect Current Conditions and Selling Costs 10% (10%) N/A Other Real Estate: RE – Residential $ 76 $ - Third Party appraisals Management Adjustments to Reflect Current Conditions and Selling Costs 10% (10%) N/A RE – Commercial $ 440 $ 285 Third Party appraisals Management Adjustments to Reflect Current Conditions and Selling Costs 16% - 29% (19%) 17% - 31% (22%) Construction and land $ 572 $ 969 Third Party appraisals Management Adjustments to Reflect Current Conditions and Selling Costs 10% (10%) 10% (10%) Equity Lines of Credit $ - $ 90 Third Party appraisals Management Adjustments to Reflect Current Conditions and Selling Costs 10% (10%) 10% (10%)

Significant Accounting Policies

Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 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 September 30, 2018 three nine September 30, 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 nine September 30, 2018 may not
Reclassification, Policy [Policy Text Block]	Reclassifications Certain reclassifications have been made to prior years’ balances to conform to the classifications used in 2018. 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% 2017 $1.4 no nine September 30, 2018.
New Accounting Pronouncements, Policy [Policy Text Block]	Recently Adopted Accounting Pronouncements In February 2018, No. 2018 02, No. 2018 02 December 22, 2017, 2017 $94,000. In May 2014, No. 2014 09 2014 09” January 1, 2018. 2014 09 not not 2014 09. 2014 09, not not 2014 09 not not On January 5, 2016, No. 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 In August 2018, No. 2018 13, December 15, 2019, No. 2018 13 not In July 2018, No. 2018 11, No. 2018 11 No. 2016 02. 2018 11: 1 may not 2 may not 2016 02 January 1, 2019 2018 11 not

Note 3 - Investment Securitie_2

Note 3 - Investment Securities Available for Sale (Tables)	9 Months Ended
	Sep. 30, 2018
Notes Tables
Schedule of Available-for-sale Securities Reconciliation [Table Text Block]	Available-for-Sale September 30, 2018 Gross Gross Amortized Unrealized Unrealized Fair Cost Gains Losses Value Debt securities: U.S. Government-sponsored agencies collateralized by mortgage obligations- residential $ 125,168 $ - $ (4,498 ) $ 120,670 Obligations of states and political subdivisions 37,024 32 (992 ) 36,064 $ 162,192 $ 32 $ (5,490 ) $ 156,734 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]	September 30, 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 $ 75,524 $ 2,103 $ 45,146 $ 2,395 $ 120,670 $ 4,498 Obligations of states and political subdivisions 27,704 632 4,697 360 32,401 992 $ 103,228 $ 2,735 $ 49,843 $ 2,755 $ 153,071 $ 5,490 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 3,060 3,029 After five years through ten years 17,299 16,906 After ten years 16,665 16,129 Investment securities not due at a single maturity date: Government-sponsored mortgage-backed securities 125,168 120,670 $ 162,192 $ 156,734

Note 4 - Loans and the Allowa_2

Note 4 - Loans and the Allowance for Loan Losses (Tables)	9 Months Ended
	Sep. 30, 2018
Notes Tables
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]	September 30, December 31, 2018 2017 Commercial $ 46,762 $ 39,620 Agricultural 70,917 58,908 Real estate – residential 15,674 16,624 Real estate – commercial 253,154 240,257 Real estate – construction and land development 38,454 25,181 Equity lines of credit 39,165 41,798 Auto 71,875 60,438 Other 3,846 3,808 Total loans 539,847 486,634 Deferred loan costs, net 2,997 2,283 Allowance for loan losses (6,846 ) (6,669 ) Total net loans $ 535,998 $ 482,248
Allowance for Credit Losses on Financing Receivables [Table Text Block]	September 30, December 31, 2018 2017 Balance, beginning of year $ 6,669 $ 6,549 Provision charged to operations 800 600 Losses charged to allowance (988 ) (879 ) Recoveries 365 399 Balance, end of period $ 6,846 $ 6,669
Financing Receivable Credit Quality Indicators [Table Text Block]	September 30 , 201 8 Commercial Credit Exposure Credit Risk Profile by Internally Assigned Grade Grade: Commercial Agricultural Real Estate- Residential Real Estate- Commercial Real Estate- Construction Equity LOC Total Pass $ 46,184 $ 70,664 $ 15,260 $ 249,576 $ 38,360 $ 38,724 $ 458,768 Special Mention 544 253 120 3,447 - - 4,364 Substandard 34 - 294 131 94 441 994 Doubtful - - - - - - - Total $ 46,762 $ 70,917 $ 15,674 $ 253,154 $ 38,454 $ 39,165 $ 464,126 December 31, 201 7 Commercial Credit Exposure Credit Risk Profile by Internally Assigned Grade Grade: Commercial Agricultural Real Estate- Residential Real Estate- Commercial Real Estate- Construction Equity LOC Total 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]	Nine months en ded 9 /30/1 Commercial Agricultural Real Estat Residential Real Estate- Commercial Real Estate- Construction Equity LOC Auto Other Total Allowance for Loan Losses Beginning balance $ 725 $ 623 $ 231 $ 2,729 $ 783 $ 533 $ 946 $ 99 $ 6,669 Charge-offs (325 ) - - - - - (628 ) (35 ) (988 ) Recoveries 23 - 93 19 3 4 213 10 365 Provision 345 (26 ) (124 ) (124 ) 122 (48 ) 635 20 800 Ending balance $ 768 $ 597 $ 200 $ 2,624 $ 908 $ 489 $ 1,166 $ 94 $ 6,846 Three months ended 9 /30/18: Allowance for Loan Losses Beginning balance $ 853 $ 546 $ 195 $ 2,699 $ 780 $ 481 $ 1,044 $ 100 $ 6,698 Charge-offs (59 ) - - - - - (152 ) (14 ) (225 ) Recoveries 8 - 2 1 1 1 58 2 73 Provision (34 ) 51 3 (76 ) 127 7 216 6 300 Ending balance $ 768 $ 597 $ 200 $ 2,624 $ 908 $ 489 $ 1,166 $ 94 $ 6,846 Nine months ended 9 /30/17: Allowance for Loan Losses Beginning balance $ 655 $ 466 $ 280 $ 2,740 $ 927 $ 575 $ 815 $ 91 $ 6,549 Charge-offs (179 ) - - - - (5 ) (295 ) (35 ) (514 ) Recoveries 46 - 3 4 - 3 123 8 187 Provision 108 95 (47 ) 39 64 77 233 31 600 Ending balance $ 630 $ 561 $ 236 $ 2,783 $ 991 $ 650 $ 876 $ 95 $ 6,822 Three months ended 9 /30/17: Allowance for Loan Losses Beginning balance $ 705 $ 514 $ 252 $ 2,812 $ 1,071 $ 561 $ 845 $ 95 $ 6,855 Charge-offs (112 ) - - - - (5 ) (205 ) (17 ) (339 ) Recoveries 27 - 1 1 - 1 73 3 106 Provision 10 47 (17 ) (30 ) (80 ) 93 163 14 200 Ending balance $ 630 $ 561 $ 236 $ 2,783 $ 991 $ 650 $ 876 $ 95 $ 6,822 September 30, 2018: Allowance for Loan Losses Ending balance: individually evaluated for impairment $ - $ - $ 42 $ - $ 12 $ 25 $ - $ - $ 79 Ending balance: collectively evaluated for impairment $ 768 $ 597 $ 158 $ 2,624 $ 896 $ 464 $ 1,166 $ 94 $ 6,767 Loans Ending balance $ 46,762 $ 70,917 $ 15,674 $ 253,154 $ 38,454 $ 39,165 $ 71,875 $ 3,846 $ 539,847 Ending balance: individually evaluated for impairment $ 14 $ 253 $ 997 $ 131 $ 213 $ 441 $ 279 $ 4 $ 2,332 Ending balance: collectively evaluated for impairment $ 46,748 $ 70,664 $ 14,677 $ 253,023 $ 38,241 $ 38,724 $ 71,596 $ 3,842 $ 537,515 December 31, 2017: 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 September 30 , 201 8 30-89 Days 90 Days and Still Past Due and Past Due Accruing Nonaccrual Nonaccrual Current Total Commercial $ 16 $ - $ - $ 16 $ 46,746 $ 46,762 Agricultural 647 - - 647 70,270 70,917 Real estate – residential 157 - 294 451 15,223 15,674 Real estate – commercial - - 131 131 253,023 253,154 Real estate - construction & land - - 94 94 38,360 38,454 Equity Lines of Credit 227 - 441 668 38,497 39,165 Auto 1,128 - 280 1,408 70,467 71,875 Other 25 - 4 29 3,817 3,846 Total $ 2,200 $ - $ 1,244 $ 3,444 $ 536,403 $ 539,847 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 September 30 , 201 8 : Investment Balance Allowance Investment Recognized With no related allowance recorded: Commercial $ 14 $ 14 $ 14 $ 1 Agricultural 253 264 253 14 Real estate – residential 817 817 688 30 Real estate – commercial 131 131 136 - Real estate – construction & land 94 94 97 - Equity Lines of Credit 186 186 48 - Auto 279 279 196 - Other 4 4 1 - With an allowance recorded: Commercial $ - $ - $ - $ - $ - Agricultural - - - - - Real estate – residential 180 180 42 181 5 Real estate – commercial - - - - - Real estate – construction & land 119 119 12 121 6 Equity Lines of Credit 255 255 25 3 - Auto - - - - - Other - - - - - Total: Commercial $ 14 $ 14 $ - $ 14 $ 1 Agricultural 253 264 - 253 14 Real estate – residential 997 997 42 869 35 Real estate – commercial 131 131 - 136 - Real estate – construction & land 213 213 12 218 6 Equity Lines of Credit 441 441 25 51 - Auto 279 279 - 196 - Other 4 4 - 1 - Total $ 2,332 $ 2,343 $ 79 $ 1,738 $ 56 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 September 30 , 201 8 December 31, 201 7 Auto Other Total Auto Other Total Grade: Performing $ 71,596 $ 3,841 $ 75,437 $ 60,060 $ 3,788 $ 63,848 Non-performing 279 5 284 378 20 398 Total $ 71,875 $ 3,846 $ 75,721 $ 60,438 $ 3,808 $ 64,246

Note 6 - Earnings Per Share (Ta

Note 6 - Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2018
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	For the Three Months For the Nine Months Ended September 30, Ended September 30, (In thousands, except per share data) 2018 2017 2018 2017 Net Income: Net income $ 3,696 $ 2,448 $ 10,422 $ 7,053 Earnings Per Share: Basic earnings per share $ 0.72 $ 0.48 $ 2.04 $ 1.41 Diluted earnings per share $ 0.71 $ 0.47 $ 2.00 $ 1.36 Weighted Average Number of Shares Outstanding: Basic shares 5,122 5,048 5,100 4,987 Diluted shares 5,225 5,192 5,219 5,181

Note 7 - Stock-based Compensa_2

Note 7 - Stock-based Compensation (Tables)	9 Months Ended
	Sep. 30, 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 (29,500 ) 2.95 Options outstanding at September 30, 2018 16,793 $ 2.95 0.5 $ 368,000 Options exercisable at September 30, 2018 16,793 $ 2.95 0.5 $ 368,000 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 (6,500 ) 20.55 Options exercised (32,200 ) 7.23 Options outstanding at September 30, 2018 197,900 $ 13.79 5.7 $ 2,189,000 Options exercisable at September 30, 2018 81,200 $ 7.33 4.3 $ 1,423,000 Expected to vest after September 30, 2018 103,583 $ 18.28 6.6 $ 680,000
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 nine months ended September 30, 2018 $ 6.54

Note 9 - Fair Value Measureme_2

Note 9 - Fair Value Measurement (Tables)	9 Months Ended
	Sep. 30, 2018
Notes Tables
Fair Value, by Balance Sheet Grouping [Table Text Block]	Fair Value Measurements at September 30, 2018 Using: Carrying Value Level 1 Level 2 Level 3 Total Fair Value Financial assets: Cash and cash equivalents $ 35,256 $ 35,256 $ 35,256 Investment securities 156,734 $ 156,734 156,734 Loans, net 535,998 $ 540,632 540,632 FHLB stock 3,027 N/A Accrued interest receivable 2,888 3 573 2,312 2,888 Financial liabilities: Deposits 682,842 642,924 39,883 682,807 Repurchase agreements 8,210 8,210 8,210 Junior subordinated deferrable interest debentures 10,310 7,744 7,744 Accrued interest payable 59 10 34 15 59 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 September 30, 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 $ 120,670 $ - $ 120,670 $ - Obligations of states and political subdivisions 36,064 36,064 $ 156,734 $ - $ 156,734 $ - 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 September 30, 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 (Losses) Nine Months Ended September 30, 2018 Assets: Impaired loans: Equity lines of credit $ 231 $ - $ - $ 231 $ (25 ) Total impaired loans $ 231 $ - $ - $ 231 $ (25 ) Other real estate: Real estate – residential 76 - - 76 (38 ) Real estate – commercial 440 - - 440 - Construction and land 572 - - 572 - Total other real estate 1,088 - - 1,088 (38 ) $ 1,319 $ - $ - $ 1,319 $ (63 ) 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 Gains (Losses) Nine Months Ended September 30, 2017 Assets: Impaired loans: Real estate – commercial $ - $ - $ - $ - $ 7 Construction and land 80 - - 80 - Equity lines of credit - - - - (115 ) Total impaired loans 80 - - 80 (108 ) Other real estate: Real estate – residential - - - - (2 ) Real estate – commercial 285 - - 285 (9 ) Construction and land 969 - - 969 (95 ) Equity lines of credit 90 - - 90 - Total other real estate 1,344 - - 1,344 (106 ) $ 1,424 $ - $ - $ 1,424 $ (214 )
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]	Description Fair Value 9/30/2018 Fair Value 12/31/2017 Valuation Technique Significant Unobservable Input Range (Weighted Average) 9/30/2018 Range (Weighted Average) 12/31/2017 Impaired Loans: Construction and land $ - $ 80 Third Party appraisals Management Adjustments to Reflect Current Conditions and Selling Costs 8% (8%) Equity Lines of Credit 231 - Third Party appraisals Management Adjustments to Reflect Current Conditions and Selling Costs 10% (10%) N/A Other Real Estate: RE – Residential $ 76 $ - Third Party appraisals Management Adjustments to Reflect Current Conditions and Selling Costs 10% (10%) N/A RE – Commercial $ 440 $ 285 Third Party appraisals Management Adjustments to Reflect Current Conditions and Selling Costs 16% - 29% (19%) 17% - 31% (22%) Construction and land $ 572 $ 969 Third Party appraisals Management Adjustments to Reflect Current Conditions and Selling Costs 10% (10%) 10% (10%) Equity Lines of Credit $ - $ 90 Third Party appraisals Management Adjustments to Reflect Current Conditions and Selling Costs 10% (10%) 10% (10%)

Note 1 - The Business of Plum_2

Note 1 - The Business of Plumas Bancorp (Details Textual)	Sep. 30, 2018
Number of Branches	11

Note 2 - Summary of Significa_2

Note 2 - Summary of Significant Accounting Policies (Details Textual)	Jan. 01, 2018USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Dec. 31, 2018	Dec. 31, 2017USD ($)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent							35.00%
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
Scenario, Forecast [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent						21.00%
Customer Concentration Risk [Member] | Sales Revenue, Net [Member]
Number of Major Customers		0		0

Note 3 - Investment Securitie_3

Note 3 - Investment Securities Available for Sale (Details Textual)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Dec. 31, 2017USD ($)
Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax, Total	$ (5,458,000)		$ (5,458,000)		$ (809,000)
Available-for-sale Securities Income Tax Expense (Benefit) on Accumulated Gross Unrealized Gains Losses	(1,613,000)		$ (1,613,000)		$ (239,000)
Number of Securities Sold During Period			18	7
Proceeds from Sale of Debt Securities, Available-for-sale	0	$ 0	$ 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		$ 0
Number of Investment Securities	203		203
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions	188		188
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions	126		126
Other-than-temporary Impairment Loss, Debt Securities, Available-for-sale, Total			$ 0
Available-for-sale Debt Securities Pledged to Secure Deposits and Repurchase Agreements Amortized Cost Basis	$ 87,579,000		87,579,000		82,059,000
Collateral Pledged [Member]
Debt Securities, Available-for-sale, Restricted	$ 84,152,000		$ 84,152,000		$ 81,006,000
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Number of Investment Securities	89		89
US States and Political Subdivisions Debt Securities [Member]
Number of Investment Securities	114		114

Note 3 - Investment Securitie_4

Note 3 - Investment Securities Available for Sale - Amortized Cost and Estimated Fair Value of Investment Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Investment securities available for sale, amortized cost	$ 162,192	$ 138,275
Investment securities available for sale, gross unrealized gains	32	508
Investment securities available for sale, gross unrealized losses	(5,490)	(1,317)
Investment securities available for sale, Estimated fair value	156,734	137,466
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Investment securities available for sale, amortized cost	125,168	104,935
Investment securities available for sale, gross unrealized gains		26
Investment securities available for sale, gross unrealized losses	(4,498)	(1,173)
Investment securities available for sale, Estimated fair value	120,670	103,788
US States and Political Subdivisions Debt Securities [Member]
Investment securities available for sale, amortized cost	37,024	33,340
Investment securities available for sale, gross unrealized gains	32	482
Investment securities available for sale, gross unrealized losses	(992)	(144)
Investment securities available for sale, Estimated fair value	$ 36,064	$ 33,678

Note 3 - Investment Securitie_5

Note 3 - Investment Securities Available for Sale - Investment Securities With Unrealized Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Less than 12 months fair value	$ 103,228	$ 62,691
Less than 12 months unrealized losses	2,735	472
12 months or more fair value	49,843	34,616
12 months or more unrealized losses	2,755	845
Total fair value	153,071	97,307
Total unrealized losses	5,490	1,317
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Less than 12 months fair value	75,524	60,070
Less than 12 months unrealized losses	2,103	441
12 months or more fair value	45,146	31,213
12 months or more unrealized losses	2,395	732
Total fair value	120,670	91,283
Total unrealized losses	4,498	1,173
US States and Political Subdivisions Debt Securities [Member]
Less than 12 months fair value	27,704	2,621
Less than 12 months unrealized losses	632	31
12 months or more fair value	4,697	3,403
12 months or more unrealized losses	360	113
Total fair value	32,401	6,024
Total unrealized losses	$ 992	$ 144

Note 3 - Investment Securitie_6

Note 3 - Investment Securities Available for Sale - Investment Securities by Contractual Maturity (Details) $ in Thousands	Sep. 30, 2018USD ($)
Within one year, amortized cost
Within one year, estimated fair value
After one year through five years, amortized cost	3,060
After one year through five years, estimated fair value	3,029
After five years through ten years, amortized cost	17,299
After five years through ten years, estimated fair value	16,906
After ten years, amortized cost	16,665
After ten years, estimated fair value	16,129
Amortized cost	162,192
Estimated fair value	156,734
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Government-sponsored mortgage-backed securities, amortized cost	125,168
Government-sponsored mortgage-backed securities, estimated fair value	$ 120,670

Note 4 - Loans and the Allowa_3

Note 4 - Loans and the Allowance for Loan Losses (Details Textual)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Dec. 31, 2017USD ($)
Impaired Financing Receivable, Recorded Investment, Total	$ 2,332,000		$ 2,332,000		$ 2,270,000
Impaired Financing Receivable, Related Allowance	79,000		79,000		82,000
Impaired Financing Receivable, with Related Allowance, Recorded Investment	554,000		554,000		475,000
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	1,778,000		1,778,000		1,795,000
Impaired Financing Receivable, Average Recorded Investment, Total			1,738,000	$ 4,982,000	1,760,000
Impaired Financing Receivable, Interest Income, Accrual Method, Total			56,000	100,000	73,000
Impaired Financing Receivable, Interest Income, Cash Basis Method, Total			0	$ 0
Financing Receivable, Modifications, Recorded Investment	1,089,000		1,089,000		1,111,000
Financing Receivable Modifications Related Allowances	54,000		54,000		63,000
Loans and Leases Receivable, Impaired, Commitment to Lend	0		$ 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	1,244,000		$ 1,244,000		$ 1,226,000
Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans	7,000	$ 52,000	36,000	$ 141,000
Number of Loans, 90 Days Past Due and Still Accruing					3
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing					$ 1,796,000
Deferred Loan Origination Costs	$ 703,000	$ 457,000	$ 1,937,000	$ 1,393,000

Note 4 - Loans and the Allowa_4

Note 4 - Loans and the Allowance for Loan Losses - Outstanding Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Loans	$ 539,847		$ 486,634
Deferred loan costs, net	2,997		2,283
Allowance for loan losses	(6,846)	$ (6,698)	(6,669)	$ (6,822)	$ (6,855)	$ (6,549)
Total net loans	535,998		482,248
Commercial Portfolio Segment [Member] | Commercial Loans [Member]
Loans	46,762		39,620
Allowance for loan losses	(768)	(853)	(725)	(630)	(705)	(655)
Commercial Portfolio Segment [Member] | Agricultural Loans [Member]
Loans	70,917		58,908
Allowance for loan losses	(597)	(546)	(623)	(561)	(514)	(466)
Commercial Portfolio Segment [Member] | Real Estate Loan [Member]
Loans	253,154		240,257
Allowance for loan losses	(2,624)	(2,699)	(2,729)	(2,783)	(2,812)	(2,740)
Commercial Portfolio Segment [Member] | Construction Loans [Member]
Loans	38,454		25,181
Allowance for loan losses	(908)	(780)	(783)	(991)	(1,071)	(927)
Residential Portfolio Segment [Member] | Real Estate Loan [Member]
Loans	15,674		16,624
Allowance for loan losses	(200)	(195)	(231)	(236)	(252)	(280)
Residential Portfolio Segment [Member] | Equity Lines of Credit [Member]
Loans	39,165		41,798
Allowance for loan losses	(489)	(481)	(533)	(650)	(561)	(575)
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Loans	71,875		60,438
Allowance for loan losses	(1,166)	(1,044)	(946)	(876)	(845)	(815)
Consumer Portfolio Segment [Member] | Other Loans [Member]
Loans	3,846		3,808
Allowance for loan losses	$ (94)	$ (100)	$ (99)	$ (95)	$ (95)	$ (91)

Note 4 - Loans and the Allowa_5

Note 4 - Loans and the Allowance for Loan Losses - Changes in the Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Beginning balance	$ 6,698	$ 6,855	$ 6,669	$ 6,549	$ 6,549
Provision	300	200	800	600	600
Charge-offs	(225)	(339)	(988)	(514)	(879)
Recoveries	73	106	365	187	399
Ending balance	$ 6,846	$ 6,822	$ 6,846	$ 6,822	$ 6,669

Note 4 - Loans and the Allowa_6

Note 4 - Loans and the Allowance for Loan Losses - Loan Portfolio Allocated by Internal Risk Ratings (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Loans	$ 539,847	$ 486,634
Commercial Portfolio Segment [Member] | Commercial Loans [Member]
Loans	46,762	39,620
Commercial Portfolio Segment [Member] | Agricultural Loans [Member]
Loans	70,917	58,908
Commercial Portfolio Segment [Member] | Real Estate Loan [Member]
Loans	253,154	240,257
Commercial Portfolio Segment [Member] | Construction Loans [Member]
Loans	38,454	25,181
Residential Portfolio Segment [Member] | Real Estate Loan [Member]
Loans	15,674	16,624
Residential Portfolio Segment [Member] | Equity Lines of Credit [Member]
Loans	39,165	41,798
Commercial and Residential Portfolio Segments [Member]
Loans	464,126	422,388
Pass [Member] | Commercial Portfolio Segment [Member] | Commercial Loans [Member]
Loans	46,184	38,851
Pass [Member] | Commercial Portfolio Segment [Member] | Agricultural Loans [Member]
Loans	70,664	56,859
Pass [Member] | Commercial Portfolio Segment [Member] | Real Estate Loan [Member]
Loans	249,576	239,944
Pass [Member] | Commercial Portfolio Segment [Member] | Construction Loans [Member]
Loans	38,360	25,081
Pass [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member]
Loans	15,260	16,218
Pass [Member] | Residential Portfolio Segment [Member] | Equity Lines of Credit [Member]
Loans	38,724	41,636
Pass [Member] | Commercial and Residential Portfolio Segments [Member]
Loans	458,768	418,589
Special Mention [Member] | Commercial Portfolio Segment [Member] | Commercial Loans [Member]
Loans	544	238
Special Mention [Member] | Commercial Portfolio Segment [Member] | Agricultural Loans [Member]
Loans	253	253
Special Mention [Member] | Commercial Portfolio Segment [Member] | Real Estate Loan [Member]
Loans	3,447	26
Special Mention [Member] | Commercial Portfolio Segment [Member] | Construction Loans [Member]
Loans
Special Mention [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member]
Loans	120	125
Special Mention [Member] | Residential Portfolio Segment [Member] | Equity Lines of Credit [Member]
Loans
Special Mention [Member] | Commercial and Residential Portfolio Segments [Member]
Loans	4,364	642
Substandard [Member] | Commercial Portfolio Segment [Member] | Commercial Loans [Member]
Loans	34	531
Substandard [Member] | Commercial Portfolio Segment [Member] | Agricultural Loans [Member]
Loans		1,796
Substandard [Member] | Commercial Portfolio Segment [Member] | Real Estate Loan [Member]
Loans	131	287
Substandard [Member] | Commercial Portfolio Segment [Member] | Construction Loans [Member]
Loans	94	100
Substandard [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member]
Loans	294	281
Substandard [Member] | Residential Portfolio Segment [Member] | Equity Lines of Credit [Member]
Loans	441	162
Substandard [Member] | Commercial and Residential Portfolio Segments [Member]
Loans	994	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 Allowa_7

Note 4 - Loans and the Allowance for Loan Losses - Credit Risk Profile by Internally Assigned Grade (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Loans	$ 539,847	$ 486,634
Consumer Portfolio Segment [Member] | Performing Financial Instruments [Member]
Loans	75,437	63,848
Consumer Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Loans	284	398
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Loans	71,875	60,438
Consumer Portfolio Segment [Member] | Automobile Loan [Member] | Performing Financial Instruments [Member]
Loans	71,596	60,060
Consumer Portfolio Segment [Member] | Automobile Loan [Member] | Nonperforming Financial Instruments [Member]
Loans	279	378
Consumer Portfolio Segment [Member] | Other Loans [Member]
Loans	3,846	3,808
Consumer Portfolio Segment [Member] | Other Loans [Member] | Performing Financial Instruments [Member]
Loans	3,841	3,788
Consumer Portfolio Segment [Member] | Other Loans [Member] | Nonperforming Financial Instruments [Member]
Loans	5	20
Consumer Portfolio Segment [Member] | Residential Portfolio Segment [Member]
Loans	$ 75,721
Consumer Portfolio Segment [Member] | Commercial Portfolio Segment [Member]
Loans		$ 64,246

Note 4 - Loans and the Allowa_8

Note 4 - Loans and the Allowance for Loan Losses - Allocation of the Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Beginning balance	$ 6,698	$ 6,855	$ 6,669	$ 6,549	$ 6,549
Charge-offs	(225)	(339)	(988)	(514)	(879)
Recoveries	73	106	365	187	399
Provision	300	200	800	600	600
Ending balance	6,846	6,822	6,846	6,822	6,669
Ending balance: individually evaluated for impairment	79		79		82
Ending balance: collectively evaluated for impairment	6,767		6,767		6,587
Ending balance	539,847		539,847		486,634
Ending balance: individually evaluated for impairment	2,332		2,332		2,270
Ending balance: collectively evaluated for impairment	537,515		537,515		484,364
Commercial Portfolio Segment [Member] | Commercial Loans [Member]
Beginning balance	853	705	725	655	655
Charge-offs	(59)	(112)	(325)	(179)
Recoveries	8	27	23	46
Provision	(34)	10	345	108
Ending balance	768	630	768	630	725
Ending balance: individually evaluated for impairment					2
Ending balance: collectively evaluated for impairment	768		768		723
Ending balance	46,762		46,762		39,620
Ending balance: individually evaluated for impairment	14		14		14
Ending balance: collectively evaluated for impairment	46,748		46,748		39,606
Commercial Portfolio Segment [Member] | Agricultural Loans [Member]
Beginning balance	546	514	623	466	466
Charge-offs
Recoveries
Provision	51	47	(26)	95
Ending balance	597	561	597	561	623
Ending balance: individually evaluated for impairment
Ending balance: collectively evaluated for impairment	597		597		623
Ending balance	70,917		70,917		58,908
Ending balance: individually evaluated for impairment	253		253		253
Ending balance: collectively evaluated for impairment	70,664		70,664		58,655
Commercial Portfolio Segment [Member] | Real Estate Loan [Member]
Beginning balance	2,699	2,812	2,729	2,740	2,740
Charge-offs
Recoveries	1	1	19	4
Provision	(76)	(30)	(124)	39
Ending balance	2,624	2,783	2,624	2,783	2,729
Ending balance: individually evaluated for impairment
Ending balance: collectively evaluated for impairment	2,624		2,624		2,729
Ending balance	253,154		253,154		240,257
Ending balance: individually evaluated for impairment	131		131		287
Ending balance: collectively evaluated for impairment	253,023		253,023		239,970
Commercial Portfolio Segment [Member] | Construction Loans [Member]
Beginning balance	780	1,071	783	927	927
Charge-offs
Recoveries	1		3
Provision	127	(80)	122	64
Ending balance	908	991	908	991	783
Ending balance: individually evaluated for impairment	12		12		32
Ending balance: collectively evaluated for impairment	896		896		751
Ending balance	38,454		38,454		25,181
Ending balance: individually evaluated for impairment	213		213		224
Ending balance: collectively evaluated for impairment	38,241		38,241		24,957
Residential Portfolio Segment [Member] | Real Estate Loan [Member]
Beginning balance	195	252	231	280	280
Charge-offs
Recoveries	2	1	93	3
Provision	3	(17)	(124)	(47)
Ending balance	200	236	200	236	231
Ending balance: individually evaluated for impairment	42		42		48
Ending balance: collectively evaluated for impairment	158		158		183
Ending balance	15,674		15,674		16,624
Ending balance: individually evaluated for impairment	997		997		934
Ending balance: collectively evaluated for impairment	14,677		14,677		15,690
Residential Portfolio Segment [Member] | Equity Lines of Credit [Member]
Beginning balance	481	561	533	575	575
Charge-offs		(5)		(5)
Recoveries	1	1	4	3
Provision	7	93	(48)	77
Ending balance	489	650	489	650	533
Ending balance: individually evaluated for impairment	25		25
Ending balance: collectively evaluated for impairment	464		464		533
Ending balance	39,165		39,165		41,798
Ending balance: individually evaluated for impairment	441		441		162
Ending balance: collectively evaluated for impairment	38,724		38,724		41,636
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Beginning balance	1,044	845	946	815	815
Charge-offs	(152)	(205)	(628)	(295)
Recoveries	58	73	213	123
Provision	216	163	635	233
Ending balance	1,166	876	1,166	876	946
Ending balance: individually evaluated for impairment
Ending balance: collectively evaluated for impairment	1,166		1,166		946
Ending balance	71,875		71,875		60,438
Ending balance: individually evaluated for impairment	279		279		377
Ending balance: collectively evaluated for impairment	71,596		71,596		60,061
Consumer Portfolio Segment [Member] | Other Loans [Member]
Beginning balance	100	95	99	91	91
Charge-offs	(14)	(17)	(35)	(35)
Recoveries	2	3	10	8
Provision	6	14	20	31
Ending balance	94	$ 95	94	$ 95	99
Ending balance: individually evaluated for impairment
Ending balance: collectively evaluated for impairment	94		94		99
Ending balance	3,846		3,846		3,808
Ending balance: individually evaluated for impairment	4		4		19
Ending balance: collectively evaluated for impairment	$ 3,842		$ 3,842		$ 3,789

Note 4 - Loans and the Allowa_9

Note 4 - Loans and the Allowance for Loan Losses - Aging Analysis of the Loan Portfolio (Details) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Loans, past due	$ 3,444,000	$ 6,471,000
Loans, 90 days past due and still accruing		1,796,000
Loans, nonaccrual	1,244,000	1,226,000
Loans, current	536,403,000	480,163,000
Loans	539,847,000	486,634,000
Financing Receivables 30 to 89 Days Past Due [Member]
Loans, past due	2,200,000	3,449,000
Commercial Portfolio Segment [Member] | Commercial Loans [Member]
Loans, past due	16,000	1,869,000
Loans, 90 days past due and still accruing
Loans, nonaccrual
Loans, current	46,746,000	37,751,000
Loans	46,762,000	39,620,000
Commercial Portfolio Segment [Member] | Commercial Loans [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans, past due	16,000	1,869,000
Commercial Portfolio Segment [Member] | Agricultural Loans [Member]
Loans, past due	647,000	1,796,000
Loans, 90 days past due and still accruing		1,796,000
Loans, nonaccrual
Loans, current	70,270,000	57,112,000
Loans	70,917,000	58,908,000
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans, past due	647,000
Commercial Portfolio Segment [Member] | Real Estate Loan [Member]
Loans, past due	131,000	287,000
Loans, 90 days past due and still accruing
Loans, nonaccrual	131,000	287,000
Loans, current	253,023,000	239,970,000
Loans	253,154,000	240,257,000
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans, past due
Commercial Portfolio Segment [Member] | Construction Loans [Member]
Loans, past due	94,000	138,000
Loans, 90 days past due and still accruing
Loans, nonaccrual	94,000	100,000
Loans, current	38,360,000	25,043,000
Loans	38,454,000	25,181,000
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	451,000	411,000
Loans, 90 days past due and still accruing
Loans, nonaccrual	294,000	281,000
Loans, current	15,223,000	16,213,000
Loans	15,674,000	16,624,000
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans, past due	157,000	130,000
Residential Portfolio Segment [Member] | Equity Lines of Credit [Member]
Loans, past due	668,000	507,000
Loans, 90 days past due and still accruing
Loans, nonaccrual	441,000	162,000
Loans, current	38,497,000	41,291,000
Loans	39,165,000	41,798,000
Residential Portfolio Segment [Member] | Equity Lines of Credit [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans, past due	227,000	345,000
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Loans, past due	1,408,000	1,424,000
Loans, 90 days past due and still accruing
Loans, nonaccrual	280,000	377,000
Loans, current	70,467,000	59,014,000
Loans	71,875,000	60,438,000
Consumer Portfolio Segment [Member] | Automobile Loan [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans, past due	1,128,000	1,047,000
Consumer Portfolio Segment [Member] | Other Loans [Member]
Loans, past due	29,000	39,000
Loans, 90 days past due and still accruing
Loans, nonaccrual	4,000	19,000
Loans, current	3,817,000	3,769,000
Loans	3,846,000	3,808,000
Consumer Portfolio Segment [Member] | Other Loans [Member] | Financing Receivables 30 to 89 Days Past Due [Member]
Loans, past due	$ 25,000	$ 20,000

Note 4 - Loans and the Allow_10

Note 4 - Loans and the Allowance for Loan Losses - Impaired Loans (Details) - USD ($)	9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Recorded investment with no related allowance recorded	$ 1,778,000		$ 1,795,000
Recorded investment with an allowance	554,000		475,000
Related Allowance	79,000		82,000
Recorded investment	2,332,000		2,270,000
Unpaid principal balance	2,343,000		2,281,000
Average recorded investment	1,738,000	$ 4,982,000	1,760,000
Interest income recognized	56,000	$ 100,000	73,000
Commercial Portfolio Segment [Member] | Commercial Loans [Member]
Recorded investment with no related allowance recorded	14,000
Unpaid principal balance with no related allowance recorded	14,000
Average recorded investment with no related allowance recorded	14,000
Interest income recognized with no related allowance recorded	1,000
Recorded investment with an allowance			14,000
Unpaid principal balance with allowance			14,000
Related Allowance			2,000
Average recorded investment with an allowance			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		1,000
Commercial Portfolio Segment [Member] | Agricultural Loans [Member]
Recorded investment with no related allowance recorded	253,000		253,000
Unpaid principal balance with no related allowance recorded	264,000		253,000
Average recorded investment with no related allowance recorded	253,000		255,000
Interest income recognized with no related allowance recorded	14,000		19,000
Recorded investment with an allowance
Unpaid principal balance with allowance
Related Allowance
Average recorded investment with an allowance
Interest income recognized with an allowance
Recorded investment	253,000		253,000
Unpaid principal balance	264,000		253,000
Average recorded investment	253,000		255,000
Interest income recognized	14,000		19,000
Commercial Portfolio Segment [Member] | Real Estate Loan [Member]
Recorded investment with no related allowance recorded	131,000		287,000
Unpaid principal balance with no related allowance recorded	131,000		287,000
Average recorded investment with no related allowance recorded	136,000		184,000
Interest income recognized with no related allowance recorded
Recorded investment with an allowance
Unpaid principal balance with allowance
Related Allowance
Average recorded investment with an allowance
Interest income recognized with an allowance
Recorded investment	131,000		287,000
Unpaid principal balance	131,000		287,000
Average recorded investment	136,000		184,000
Interest income recognized
Commercial Portfolio Segment [Member] | Construction Loans [Member]
Recorded investment with no related allowance recorded	94,000
Unpaid principal balance with no related allowance recorded	94,000
Average recorded investment with no related allowance recorded	97,000
Interest income recognized with no related allowance recorded
Recorded investment with an allowance	119,000		224,000
Unpaid principal balance with allowance	119,000		224,000
Related Allowance	12,000		32,000
Average recorded investment with an allowance	121,000		230,000
Interest income recognized with an allowance	6,000		8,000
Recorded investment	213,000		224,000
Unpaid principal balance	213,000		224,000
Average recorded investment	218,000		230,000
Interest income recognized	6,000		8,000
Residential Portfolio Segment [Member] | Real Estate Loan [Member]
Recorded investment with no related allowance recorded	817,000		697,000
Unpaid principal balance with no related allowance recorded	817,000		708,000
Average recorded investment with no related allowance recorded	688,000		548,000
Interest income recognized with no related allowance recorded	30,000		38,000
Recorded investment with an allowance	180,000		237,000
Unpaid principal balance with allowance	180,000		237,000
Related Allowance	42,000		48,000
Average recorded investment with an allowance	181,000		203,000
Interest income recognized with an allowance	5,000		7,000
Recorded investment	997,000		934,000
Unpaid principal balance	997,000		945,000
Average recorded investment	869,000		751,000
Interest income recognized	35,000		45,000
Residential Portfolio Segment [Member] | Equity Lines of Credit [Member]
Recorded investment with no related allowance recorded	186,000		162,000
Unpaid principal balance with no related allowance recorded	186,000		162,000
Average recorded investment with no related allowance recorded	48,000		180,000
Interest income recognized with no related allowance recorded
Recorded investment with an allowance	255,000
Unpaid principal balance with allowance	255,000
Related Allowance	25,000
Average recorded investment with an allowance	3,000
Interest income recognized with an allowance
Recorded investment	441,000		162,000
Unpaid principal balance	441,000		162,000
Average recorded investment	51,000		180,000
Interest income recognized
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Recorded investment with no related allowance recorded	279,000		377,000
Unpaid principal balance with no related allowance recorded	279,000		377,000
Average recorded investment with no related allowance recorded	196,000		144,000
Interest income recognized with no related allowance recorded
Recorded investment with an allowance
Unpaid principal balance with allowance
Related Allowance
Average recorded investment with an allowance
Interest income recognized with an allowance
Recorded investment	279,000		377,000
Unpaid principal balance	279,000		377,000
Average recorded investment	196,000		144,000
Interest income recognized
Consumer Portfolio Segment [Member] | Other Loans [Member]
Recorded investment with no related allowance recorded	4,000		19,000
Unpaid principal balance with no related allowance recorded	4,000		19,000
Average recorded investment with no related allowance recorded	1,000		1,000
Interest income recognized with no related allowance recorded
Recorded investment with an allowance
Unpaid principal balance with allowance
Related Allowance
Average recorded investment with an allowance
Interest income recognized with an allowance
Recorded investment	4,000		19,000
Unpaid principal balance	4,000		19,000
Average recorded investment	1,000		1,000
Interest income recognized

Note 5 - Commitments and Cont_2

Note 5 - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Unused Commitments to Extend Credit	$ 131,200	$ 107,400
Construction Loan Payable [Member]
Unused Commitments to Extend Credit	37,700
Standby Letters of Credit [Member]
Unused Commitments to Extend Credit	$ 417	$ 477

Note 6 - Earnings Per Share (De

Note 6 - Earnings Per Share (Details Textual) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	71,000	0	71,000	0

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		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net income	$ 3,696	$ 2,448	$ 10,422	$ 7,053
Basic earnings per share (in dollars per share)	$ 0.72	$ 0.48	$ 2.04	$ 1.41
Diluted earnings per share (in dollars per share)	$ 0.71	$ 0.47	$ 2	$ 1.36
Basic shares (in shares)	5,122	5,048	5,100	4,987
Diluted shares (in shares)	5,225	5,192	5,219	5,181

Note 7 - Stock-based Compensa_3

Note 7 - Stock-based Compensation (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total	$ 506,000		$ 506,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition			2 years 255 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value			$ 1,261,000	$ 674,000
Allocated Share-based Compensation Expense, Total	50,000	$ 35,000	148,000	122,000
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	$ 3,000	$ 4,000	10,000	11,000
Proceeds from Stock Options Exercised			291,000	226,000
Employee Service Share-based Compensation, Tax Benefit from Exercise of Stock Options			$ 99,000	$ 52,000
Stock Option Plan 2001 [Member]
Common Stock, Capital Shares Reserved for Future Issuance	16,793		16,793
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	0		0
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total	$ 0		$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value
Stock Option Plan 2013 [Member]
Common Stock, Capital Shares Reserved for Future Issuance	434,000		434,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	236,100		236,100
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
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value			$ 150,000	$ 161,000
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 Compensa_4

Note 7 - Stock-based Compensation - Stock Option Activity (Details) - USD ($)	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Options exercised, intrinsic value	$ 1,261,000	$ 674,000
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)	(29,500)
Options exercised, weighted average exercise price (in dollars per share)	$ 2.95
Options exercised, intrinsic value
Options outstanding (in shares)	16,793
Options outstanding, weighted average exercise price (in dollars per share)	$ 2.95
Options outstanding, weighted average remaining contractual term (Year)	182 days
Options outstanding, intrinsic value	$ 368,000
Options exercisable (in shares)	16,793
Options exercisable, weighted average exercise price (in dollars per share)	$ 2.95
Options exercisable, weighted average remaining contractual term (Year)	182 days
Options exercisable, intrinsic value	$ 368,000
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)	(32,200)
Options exercised, weighted average exercise price (in dollars per share)	$ 7.23
Options outstanding (in shares)	197,900
Options outstanding, weighted average exercise price (in dollars per share)	$ 13.79
Options outstanding, weighted average remaining contractual term (Year)	5 years 255 days
Options outstanding, intrinsic value	$ 2,189,000
Options exercisable (in shares)	81,200
Options exercisable, weighted average exercise price (in dollars per share)	$ 7.33
Options exercisable, weighted average remaining contractual term (Year)	4 years 109 days
Options exercisable, intrinsic value	$ 1,423,000
Options granted (in shares)	76,000	0
Options granted, weighted average exercise price (in dollars per share)	$ 24.40
Options cancelled (in shares)	(6,500)
Options cancelled, weighted average exercise price (in dollars per share)	$ 20.55
Options expected to vest (in shares)	103,583
Options expected to vest, weighted average exercise price (in dollars per share)	$ 18.28
Options expected to vest, weighted average remaining contractual term (Year)	6 years 219 days
Options expected to vest, intrinsic value	$ 680,000

Note 7 - Stock-based Compensa_5

Note 7 - Stock-based Compensation - Weighted Average Fair Value Assumptions (Details) - Employee Stock Option [Member]	9 Months Ended
	Sep. 30, 2018$ / shares
Expected life of stock options (Year)	5 years 36 days
Risk free interest rate	2.38%
Volatility	30.40%
Dividend yields	1.39%
Weighted-average fair value of options granted during the nine months ended September 30, 2018 (in dollars per share)	$ 6.54

Note 8 - Income Taxes (Details

Note 8 - Income Taxes (Details Textual) $ in Thousands	Sep. 30, 2018USD ($)
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	$ 0

Note 9 - Fair Value Measureme_3

Note 9 - Fair Value Measurement (Details Textual) - USD ($)	9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Financial and Nonfinancial Liabilities, Fair Value Disclosure	$ 0		$ 0
Gain (Loss) on Sale of Assets and Asset Impairment Charges	(63,000)		$ (214,000)
Impaired Loans [Member]
Gain (Loss) on Sale of Assets and Asset Impairment Charges	$ (25,000)	$ (108,000)

Note 9 - Fair Value Measureme_4

Note 9 - Fair Value Measurement - Carrying Amounts and Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Estimated fair value	$ 156,734
Reported Value Measurement [Member]
Cash and cash equivalents	35,256	$ 87,537
Estimated fair value	156,734	137,466
Loans, net	535,998	482,248
FHLB stock	3,027	2,685
Accrued interest receivable	2,888	2,582
Deposits	682,842	662,657
Repurchase agreements	8,210	10,074
Junior subordinated deferrable interest debentures	10,310	10,310
Accrued interest payable	59	64
Estimate of Fair Value Measurement [Member]
Cash and cash equivalents	35,256	87,537
Estimated fair value	156,734	137,466
Loans, net	540,632	484,269
Accrued interest receivable	2,888	2,582
Deposits	682,807	662,678
Repurchase agreements	8,210	10,074
Junior subordinated deferrable interest debentures	7,744	7,829
Accrued interest payable	59	64
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Cash and cash equivalents	35,256	87,537
Accrued interest receivable	3	31
Deposits	642,924	616,617
Accrued interest payable	10	10
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Estimated fair value	156,734	137,466
Accrued interest receivable	573	522
Deposits	39,883	46,061
Repurchase agreements	8,210	10,074
Accrued interest payable	34	39
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Loans, net	540,632	484,269
Accrued interest receivable	2,312	2,029
Junior subordinated deferrable interest debentures	7,744	7,829
Accrued interest payable	$ 15	$ 15

Note 9 - Fair Value Measureme_5

Note 9 - Fair Value Measurement - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale	$ 156,734	$ 137,466
Fair Value, Measurements, Recurring [Member]
Debt Securities, Available-for-sale	156,734
Assets		137,466
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Debt Securities, Available-for-sale	156,734
Assets		137,466
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Debt Securities, Available-for-sale	120,670	103,788
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Measurements, Recurring [Member]
Debt Securities, Available-for-sale	120,670	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	120,670	103,788
US States and Political Subdivisions Debt Securities [Member]
Debt Securities, Available-for-sale	36,064	33,678
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Debt Securities, Available-for-sale	36,064	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	$ 36,064	$ 33,678

Note 9 - Fair Value Measureme_6

Note 9 - Fair Value Measurement - Assets and Liabilities Measured at Fair Value on a Non-recurring Basis (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Impaired loans, Total gain (loss)	$ (25)	$ (108)
Other real estate, Total gain (loss)	(38)	(106)
Asset, Total gain (loss)	(63)	(214)
Residential Portfolio Segment [Member] | Equity Lines of Credit [Member]
Impaired loans, Total gain (loss)		(115)
Other real estate, Total gain (loss)
Residential Portfolio Segment [Member] | Real Estate Loan [Member]
Other real estate, Total gain (loss)	(38)	(2)
Commercial Portfolio Segment [Member] | Real Estate Loan [Member]
Impaired loans, Total gain (loss)		7
Other real estate, Total gain (loss)		(9)
Commercial Portfolio Segment [Member] | Construction Loans [Member]
Impaired loans, Total gain (loss)
Other real estate, Total gain (loss)		(95)
Fair Value, Measurements, Nonrecurring [Member]
Impaired loans	231	80
Other real estate	1,088	1,344
Assets	1,319	1,424
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans	231	80
Other real estate	1,088	1,344
Assets	1,319	1,424
Fair Value, Measurements, Nonrecurring [Member] | Residential Portfolio Segment [Member] | Equity Lines of Credit [Member]
Impaired loans	231
Impaired loans, Total gain (loss)	(25)
Other real estate		90
Fair Value, Measurements, Nonrecurring [Member] | Residential Portfolio Segment [Member] | Equity Lines of Credit [Member] | Fair Value, Inputs, Level 1 [Member]
Impaired loans
Fair Value, Measurements, Nonrecurring [Member] | Residential Portfolio Segment [Member] | Equity Lines of Credit [Member] | Fair Value, Inputs, Level 2 [Member]
Impaired loans
Fair Value, Measurements, Nonrecurring [Member] | Residential Portfolio Segment [Member] | Equity Lines of Credit [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans	231
Other real estate		90
Fair Value, Measurements, Nonrecurring [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member]
Other real estate	76
Fair Value, Measurements, Nonrecurring [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Fair Value, Inputs, Level 1 [Member]
Other real estate
Fair Value, Measurements, Nonrecurring [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Fair Value, Inputs, Level 2 [Member]
Other real estate
Fair Value, Measurements, Nonrecurring [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Fair Value, Inputs, Level 3 [Member]
Other real estate	76
Fair Value, Measurements, Nonrecurring [Member] | Commercial Portfolio Segment [Member] | Real Estate Loan [Member]
Impaired loans
Other real estate	440	285
Fair Value, Measurements, Nonrecurring [Member] | Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Fair Value, Inputs, Level 3 [Member]
Impaired loans
Other real estate	440	285
Fair Value, Measurements, Nonrecurring [Member] | Commercial Portfolio Segment [Member] | Construction Loans [Member]
Impaired loans		80
Other real estate	572	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		80
Other real estate	$ 572	$ 969

Note 9 - Fair Value Measureme_7

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	Sep. 30, 2018USD ($)	Dec. 31, 2017USD ($)
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Measurement Input, Cost to Sell [Member]
Other real estate, Measurement Input	0.1	0.1
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Measurement Input, Cost to Sell [Member] | Weighted Average [Member]
Other real estate, Measurement Input	0.1	0.1
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Measurement Input, Cost to Sell [Member] | Weighted Average [Member]
Other real estate, Measurement Input	0.19	0.22
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Measurement Input, Cost to Sell [Member] | Minimum [Member]
Other real estate, Measurement Input	0.16	0.17
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Measurement Input, Cost to Sell [Member] | Maximum [Member]
Other real estate, Measurement Input	0.29	0.31
Residential Portfolio Segment [Member] | Equity Lines of Credit [Member] | Measurement Input, Cost to Sell [Member]
Other real estate, Measurement Input	0.1	0.1
Residential Portfolio Segment [Member] | Equity Lines of Credit [Member] | Measurement Input, Cost to Sell [Member] | Weighted Average [Member]
Other real estate, Measurement Input	0.1	0.1
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Measurement Input, Cost to Sell [Member]
Other real estate, Measurement Input	0.1
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Measurement Input, Cost to Sell [Member] | Weighted Average [Member]
Other real estate, Measurement Input	0.1
Impaired Loans [Member] | Commercial Portfolio Segment [Member] | Construction Loans [Member] | Measurement Input, Cost to Sell [Member]
Impaired loans, Measurement Input		0.08
Impaired Loans [Member] | Commercial Portfolio Segment [Member] | Construction Loans [Member] | Measurement Input, Cost to Sell [Member] | Weighted Average [Member]
Impaired loans, Measurement Input		0.08
Impaired Loans [Member] | Residential Portfolio Segment [Member] | Equity Lines of Credit [Member] | Measurement Input, Cost to Sell [Member]
Impaired loans, Measurement Input	0.1
Impaired Loans [Member] | Residential Portfolio Segment [Member] | Equity Lines of Credit [Member] | Measurement Input, Cost to Sell [Member] | Weighted Average [Member]
Impaired loans, Measurement Input	0.1
Fair Value, Measurements, Nonrecurring [Member]
Impaired loans	$ 231	$ 80
Other real estate	1,088	1,344
Fair Value, Measurements, Nonrecurring [Member] | Commercial Portfolio Segment [Member] | Construction Loans [Member]
Impaired loans		80
Other real estate	572	969
Fair Value, Measurements, Nonrecurring [Member] | Commercial Portfolio Segment [Member] | Real Estate Loan [Member]
Impaired loans
Other real estate	440	285
Fair Value, Measurements, Nonrecurring [Member] | Residential Portfolio Segment [Member] | Equity Lines of Credit [Member]
Impaired loans	231
Other real estate		90
Fair Value, Measurements, Nonrecurring [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member]
Other real estate	76
Fair Value, Measurements, Nonrecurring [Member] | Impaired Loans [Member] | Commercial Portfolio Segment [Member] | Construction Loans [Member]
Impaired loans		80
Fair Value, Measurements, Nonrecurring [Member] | Impaired Loans [Member] | Residential Portfolio Segment [Member] | Equity Lines of Credit [Member]
Impaired loans	$ 231