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Note 7 - Summary of Operations by Quarter (Details) - USD ($) | 3 Months Ended
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Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013
Revenues | $ 10,760,000 |  | $ 10,503,000 | $ 11,392,000 | $ 11,323,000 | $ 11,497,000 | $ 11,147,000 | $ 10,828,000 | $ 9,951,000
Costs and expenses | 11,812,000 |  | 11,636,000 | 12,358,000 | 11,684,000 | 11,637,000 | 11,410,000 | 11,346,000 | 11,220,000
Income (Loss) from operations | (1,052,000) |  | (1,133,000) | (966,000) | (361,000) | (140,000) | (263,000) | (518,000) | (1,269,000)
Other income, net | 532,000 | [1] | 1,106,000 | 795,000 | 769,000 | 845,000 | 276,000 | 591,000 | 619,000
Income (loss) before taxes | (520,000) |  | (27,000) | (171,000) | 408,000 | 705,000 | 13,000 | 73,000 | (650,000)
Benefits from income taxes | 360,000 |  | 60,000 | 675,000 | 25,000 | 475,000 | 25,000 | (20,000) | 10,000
Net income | $ (160,000) |  | $ 33,000 | $ 504,000 | $ 433,000 | $ 1,180,000 | $ 38,000 | $ 53,000 | $ (640,000)
Basic and diluted net income per share (in dollars per share) | $ (0.11) |  | $ 0.02 | $ 0.37 | $ 0.31 | $ 0.85 | $ 0.03 | $ 0.04 | $ (0.46)
[1] | Includes other-than-temporary impairment losses on investments of $376,000.

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- Definition The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. + References No definition available. + Details
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- Definition Amount of income (loss) from continuing operations attributable to the parent. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.13) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=51664549&loc=SL4613673-111683 + Details
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Income Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6515339 + Details
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