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Note 9 - Stock-based Compensation (Details) - Stock Option Activity (USD $) | 6 Months Ended | 12 Months Ended | 1 Months Ended
--- | --- | --- | ---
Jun. 30, 2014 | Dec. 31, 2013 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009 | Jun. 30, 2014 Firstbank Plans [Member]
Note 9 - Stock-based Compensation (Details) - Stock Option Activity [Line Items] |  |  |  |  |  |
Outstanding, shares |  |  |  |  |  | 0
Outstanding, weighted average exercise price |  |  |  |  |  |
Options exercisable at period-end |  |  |  |  |  | 255,373
Options exercisable at period-end |  |  |  |  |  | $ 16.44
Granted | 0 | 0 | 0 | 0 | 0 | 0
Granted |  |  |  |  |  |
Assumed as part of merger |  |  |  |  |  | 282,178
Assumed as part of merger |  |  |  |  |  | $ 15.48
Exercised |  |  |  |  |  | (3,075)
Exercised |  |  |  |  |  | $ 7.80
Forfeited or expired |  |  |  |  |  | 0
Forfeited or expired |  |  |  |  |  |
Outstanding, shares |  |  |  |  |  | 279,103
Outstanding, weighted average exercise price |  |  |  |  |  | $ 15.57

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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3)-(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price of options that were either forfeited or expired. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3)-(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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