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Note 3 - Fair Value Measurements (Details) (USD $) | 3 Months Ended |  |  | 3 Months Ended
--- | --- | --- | --- | ---
Jun. 30, 2013 | Jun. 24, 2012 | Mar. 31, 2013 | Sep. 23, 2012 | Mar. 31, 2013 Privately-Owned Company [Member]
Note 3 - Fair Value Measurements (Details) [Line Items] |  |  |  |  |
Cost Method Investment Ownership Percentage | 2.50% |  |  | 2.50% |
Long-term Investments | $ 100,000 |  | $ 500,000 | $ 500,000 |
Assets | 55,640,000 |  | 49,662,000 |  | 2,426,000
Stockholders' Equity Attributable to Parent | 38,882,000 |  | 34,148,000 |  | 1,817,000
Revenues | 23,401,000 | 20,182,000 |  |  | 616,000
Net Income (Loss) Attributable to Parent | $ 3,354,000 | $ 2,006,000 |  |  | $ 528,000

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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.18) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 18 -Article 5 + Details
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