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Note 9 - Employee Benefits (Detail) - Nonvested option awards activity: (USD $) | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Service-based options: |  |  |
Granted | 96,250 |  |
Granted (in Dollars per share) | $ 7.22 | $ 8.54 | $ 9.31
Forfeited | 11,700 |  |
Service-Based Options [Member] |  |  |
Service-based options: |  |  |
Shares - Nonvested | 204,740 |  |
Weighted Average Grant Date Fair Value - Nonvested (in Dollars per share) | $ 8.23 |  |
Weighted Average Remaining Contractual Life (in Years) - Nonvested | 5 years |  |
Granted | 96,250 |  |
Granted (in Dollars per share) | $ 7.22 |  |
Granted | 6 years 328 days |  |
Vested | (92,870) |  |
Vested (in Dollars per share) | $ 8.09 |  |
Vested | 4 years 146 days |  |
Forfeited | (9,900) |  |
Forfeited (in Dollars per share) | $ 7.94 |  |
Forfeited | 4 years 6 months |  |
Shares - Nonvested | 198,220 |  |
Weighted Average Grant Date Fair Value - Nonvested (in Dollars per share) | $ 7.82 |  |
Weighted Average Remaining Contractual Life (in Years) - Nonvested | 5 years 73 days |  |

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- Details
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- Definition Weighted average remaining contractual term for forfeited options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Weighted average fair value as of the grant date of stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. + References No definition available. + Details
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- Definition Weighted average remaining contractual term for options granted, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition The number of non-vested stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References No definition available. + Details
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- Definition The weighted average fair value of nonvested options for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. + References No definition available. + Details
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- Definition Weighted average remaining contractual term for nonvested options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition The number of stock (or unit) options, that vested during the reporting period. + References No definition available. + Details
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- Definition The weighted average fair value as of grant date pertaining to stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to exercise the option. + References No definition available. + Details
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- Definition Weighted average remaining contractual term for options which vested, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition 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. + 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) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph b(1)(f) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph c(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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