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Note 12 - Stockholders' Equity (Detail) - Other selected information is as follows: (USD $)
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12 Months Ended | ||
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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| Aggregate intrinsic value of outstanding options | $ 76,000 | $ 53,000 | $ 935,000 |
| Aggregate intrinsic value of options exercised | $ 6,000 | ||
| Weighted average fair value per share of options granted (in Dollars per share) | $ 0.91 | $ 1.77 | $ 2.28 |
| X | ||||||||||
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- Definition
The total accumulated difference between fair values of underlying shares on dates of exercise and exercise price on options which were exercised (or share units converted) into shares during the reporting period under the plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of options outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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