Note 3 - Marketable Securities (Details Textual) (USD $)	3 Months Ended	12 Months Ended
Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Marketable Securities, Current	$ 5,278,752us-gaap_MarketableSecuritiesCurrent	$ 1,460,518us-gaap_MarketableSecuritiesCurrent	$ 5,278,752us-gaap_MarketableSecuritiesCurrent	$ 1,460,518us-gaap_MarketableSecuritiesCurrent
Available-for-sale Securities, Amortized Cost Basis	5,490,000	1,471,000	5,490,000	1,471,000
Available-for-sale Securities, Gross Unrealized Gain		16,000	0
Available-for-sale Securities, Gross Unrealized Loss		27,000	211,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	4,168,000	1,185,000	4,168,000	1,185,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	176,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	35,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	1,111,000		1,111,000
Marketable Securities, Realized Gain (Loss), Excluding Other than Temporary Impairments			$ 8,487	$ 10,954

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

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Amount of unrealized loss on securities classified as available-for-sale that have been in a loss position for twelve months or longer.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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-Section 50

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Amount of unrealized loss on investments in available-for-sale securities that have been in a loss position for less than twelve months.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

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This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months.

+ References

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-Publisher FASB

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Amount of unrealized gain before deducting unrealized loss on investments in debt and equity securities classified as available-for-sale securities.

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Amount of unrealized loss before deducting unrealized gain on investments in available-for-sale securities.

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-Name Accounting Standards Codification

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Amount of investments in debt and equity securities, including, but not limited to, held-to-maturity, trading and available-for-sale expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer.

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- Definition

This item represents the total realized gain (loss) included in earnings for the period as a result of selling marketable securities categorized as trading, available-for-sale, or held-to-maturity.

+ References

No definition available.

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