Note 11 - Stockholders' Equity (Details) - Outstanding and Exercisable Options (USD $)	12 Months Ended
Dec. 31, 2014
Exercise Price Range 1 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower limit	$ 3.00
Exercise price range, upper limit	$ 3.99
Options outstanding, number outstanding (in Shares)	34,000
Options outstanding, weighted average remaining contractual	2 years 346 days
Options outstanding, weighted average exercise price	$ 3.65
Options outstanding, intrinsic value (in Dollars)	$ 365,160
Options exercisable, numnber exercisable (in Shares)	34,000
Options exercisable, weighted average exercise price	$ 3.65
Options exercisable, intrinsic value (in Dollars)	365,160
Exercise Price Range 2 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower limit	$ 4.00
Exercise price range, upper limit	$ 4.49
Options outstanding, number outstanding (in Shares)	15,930
Options outstanding, weighted average remaining contractual	5 years 14 days
Options outstanding, weighted average exercise price	$ 4.25
Options outstanding, intrinsic value (in Dollars)	161,530
Options exercisable, numnber exercisable (in Shares)	15,930
Options exercisable, weighted average exercise price	$ 4.25
Options exercisable, intrinsic value (in Dollars)	161,530
Exercise Price Range 3 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower limit	$ 4.50
Exercise price range, upper limit	$ 4.99
Options outstanding, number outstanding (in Shares)	100,000
Options outstanding, weighted average remaining contractual	2 years 284 days
Options outstanding, weighted average exercise price	$ 4.62
Options outstanding, intrinsic value (in Dollars)	977,000
Options exercisable, numnber exercisable (in Shares)	75,000
Options exercisable, weighted average exercise price	$ 4.62
Options exercisable, intrinsic value (in Dollars)	854,875
Exercise Price Range 4 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower limit	$ 5.00
Exercise price range, upper limit	$ 7.99
Options outstanding, number outstanding (in Shares)	9,800
Options outstanding, weighted average remaining contractual	6 years 14 days
Options outstanding, weighted average exercise price	$ 7.90
Options outstanding, intrinsic value (in Dollars)	63,602
Options exercisable, numnber exercisable (in Shares)	9,800
Options exercisable, weighted average exercise price	$ 7.90
Options exercisable, intrinsic value (in Dollars)	63,602
Exercise Price Range 5 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower limit	$ 8.00
Exercise price range, upper limit	$ 12.00
Options outstanding, number outstanding (in Shares)	100,000
Options outstanding, weighted average remaining contractual	9 years 292 days
Options outstanding, weighted average exercise price	$ 11.17
Options outstanding, intrinsic value (in Dollars)	322,000
Options exercisable, numnber exercisable (in Shares)	0
Options exercisable, weighted average exercise price	$ 11.17
Options exercisable, intrinsic value (in Dollars)	$ 0

Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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-Publisher FASB

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The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

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Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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