Note 15 - Employee Equity Incentive Plans (Details) - Stock Options Oustanding (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Strike Price Range Lower Limit	$ 0.045
Strike Price Range Upper Limit	$ 0.50
Strike Price Range 0.00 to 0.20 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Strike Price Range Lower Limit	$ 0.00	$ 0.00
Strike Price Range Upper Limit	$ 0.20	$ 0.20
Outstanding Stock Options (in Shares)	2,080,000	3,251,000
Weighted Average Remaining Contractual Life	1 year 357 days	2 years 58 days
Weighted Average Outstanding Strike Price	$ 0.13	$ 0.15
Vested Stock Options (in Shares)	1,855,000	2,530,166
Weighted Average Remianing Vested Life	1 year 262 days	1 year 313 days
Weighted Average Vested Strike Price	$ 0.12	$ 0.16
Strike Price Range 0.21 to 0.29 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Strike Price Range Lower Limit	$ 0.21	$ 0.21
Strike Price Range Upper Limit	$ 0.29	$ 0.29
Outstanding Stock Options (in Shares)	600,000	750,000
Weighted Average Remaining Contractual Life	335 days	1 year 233 days
Weighted Average Outstanding Strike Price	$ 0.24	$ 0.25
Vested Stock Options (in Shares)	550,000	650,000
Weighted Average Remianing Vested Life	251 days	1 year 73 days
Weighted Average Vested Strike Price	$ 0.25	$ 0.25
Strike Price Range 0.30 to 0.49 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Strike Price Range Lower Limit	$ 0.30	$ 0.30
Strike Price Range Upper Limit	$ 0.49	$ 0.49
Outstanding Stock Options (in Shares)	0	110,000
Weighted Average Remaining Contractual Life	0 years	357 days
Weighted Average Outstanding Strike Price	$ 0.00	$ 0.38
Vested Stock Options (in Shares)	0	110,000
Weighted Average Remianing Vested Life	0 years	357 days
Weighted Average Vested Strike Price	$ 0.00	$ 0.38
Strike Price Range 0.50 to 0.70 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Strike Price Range Lower Limit	$ 0.50	$ 0.50
Strike Price Range Upper Limit	$ 0.70	$ 0.70
Outstanding Stock Options (in Shares)	450,000	1,634,000
Weighted Average Remaining Contractual Life	248 days	317 days
Weighted Average Outstanding Strike Price	$ 0.50	$ 0.59
Vested Stock Options (in Shares)	450,000	1,634,000
Weighted Average Remianing Vested Life	248 days	317 days
Weighted Average Vested Strike Price	$ 0.50	$ 0.59
Strike Price Range 0.00 to 0.70 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Strike Price Range Lower Limit	$ 0.00	$ 0.00
Strike Price Range Upper Limit	$ 0.70	$ 0.70
Outstanding Stock Options (in Shares)	3,130,000	5,745,000
Weighted Average Remaining Contractual Life	1 year 215 days	1 year 255 days
Weighted Average Outstanding Strike Price	$ 0.20	$ 0.29
Vested Stock Options (in Shares)	2,855,000	4,924,166
Weighted Average Remianing Vested Life	1 year 127 days	1 year 153 days
Weighted Average Vested Strike Price	$ 0.21	$ 0.32

As of the balance sheet date, the weighted-average exercise price (at which grantees can acquire the shares reserved for issuance) for exercisable stock options that are fully vested or expected to vest.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)(2)

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

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As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be converted under the option plan.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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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

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

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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.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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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

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

-Publisher FASB

-Name Accounting Standards Codification

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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

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

-Publisher FASB

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