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Note 11 - Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2012
Schedule of Share-based Compensation, Activity [Table Text Block] |
|  | 2012 |  |  | 2011 |  |  | 2010 |
|  | Option Shares |  |  | Weighted Average Exercise Price |  |  | Option Shares |  |  | Weighted Average Exercise Price |  |  | Option Shares |  |  | Weighted Average Exercise Price |
Outstanding at January 1 |  |  | 115,600 |  |  | $ | 4.40 |  |  |  | 103,600 |  |  | $ | 4.35 |  |  |  | 197,700 |  |  | $ | 2.23 |
Granted |  |  | 12,000 |  |  |  | 5.27 |  |  |  | 12,000 |  |  |  | 4.80 |  |  |  | 42,600 |  |  |  | 4.59 |
Forfeited or expired |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Exchanged |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Exercised |  |  | (6,000 | ) |  |  | 3.50 |  |  |  | - |  |  |  | - |  |  |  | (136,700 | ) |  |  | 1.65 |
Outstanding at December 31 |  |  | 121,600 |  |  | $ | 4.53 |  |  |  | 115,600 |  |  | $ | 4.40 |  |  |  | 103,600 |  |  | $ | 4.35 |
Exercisable at end of year |  |  | 121,600 |  |  | $ | 4.53 |  |  |  | 115,600 |  |  | $ | 4.40 |  |  |  | 70,000 |  |  | $ | 4.33 |
Weighted-average fair value of options granted during year |  | $ | 0.83 |  |  |  |  |  |  | $ | 1.19 |  |  |  |  |  |  | $ | 1.42 |  |  |  |  |
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block] |
|  |  |  | Options Outstanding |  |  | Options Exercisable |
Exercise Price Range |  | Option Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Maturity (Years) |  |  | Option Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Maturity (Years) |
$2.72 | to | $3.90 |  |  | 4,000 |  |  | $ | 3.885 |  |  |  | 1.24 |  |  |  | 4,000 |  |  | $ | 3.885 |  |  |  | 1.24 |
$3.91 | to | $5.30 |  |  | 117,600 |  |  |  | 4.553 |  |  |  | 4.96 |  |  |  | 117,600 |  |  |  | 4.553 |  |  |  | 4.96 |
|  |  |  |  | 121,600 |  |  | $ | 4.53 |  |  |  | 4.83 |  |  |  | 121,600 |  |  | $ | 4.53 |  |  |  | 4.83 |

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- Definition Tabular disclosure of share-based compensation plans that may be presented in a single table for outstanding, vested and expected to vest, and exercisable awards. The information that may be disclosed in this table may include, but is not limited to, number of shares, weighted average exercise price, weighted average remaining contractual life, and aggregate intrinsic value. + References No definition available. + Details
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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -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 64 -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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph 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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