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Note 2 - Allowance for Doubtful Accounts | 12 Months Ended
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Dec. 31, 2014
Disclosure Text Block Supplement [Abstract] |
Allowance for Credit Losses [Text Block] | Note B – Allowance for Doubtful Accounts The allowance for doubtful accounts was $474,000 and $498,000 at December 31, 2014 and 2013, respectively.

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- Definition The entire disclosure for allowance for credit losses. + References No definition available. + Details
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Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_DisclosureTextBlockSupplementAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration