Note 7 - Stockholder's Equity (Details) - Stock Option Activity - 6 months ended Jun. 30, 2015 - USD ($)	Total
2012 Omnibus Incentive Plan [Member]
Note 7 - Stockholder's Equity (Details) - Stock Option Activity [Line Items]
Options Outstanding	1,951,957
Options Outstanding, Weighted- Average Exercise Price	$ 2.25
Options Granted	1,430,000
Options Granted, Weighted-Average Exercise Price	$ 1.74
Options Forfeited or Expired	(57,332)
Options Forfeited or Expired, Weighted-Average Exercise Price	$ 2.00
Options Outstanding	3,324,625
Options Outstanding, Weighted- Average Exercise Price	$ 2.04
Options Outstanding, Weighted Average Remaining Contractual Life	9 years
Options Outstanding, Aggregate Intrinsic Value	$ 37,011
Options Exercisable	1,217,060
Options Exercisable, Weighted-Average Exercise Price	$ 2.17
Options Exercisable, Weighted Average Remaining Contractual Life	8 years 109 days
Options Exercisable, Aggregate Intrinsic Value	$ 23,102
2006 Stock Incentive Plan [Member]
Note 7 - Stockholder's Equity (Details) - Stock Option Activity [Line Items]
Options Outstanding	7,223,107
Options Outstanding, Weighted- Average Exercise Price	$ 2.30
Options Forfeited or Expired	(182,304)
Options Forfeited or Expired, Weighted-Average Exercise Price	$ 4.07
Options Outstanding	7,040,803
Options Outstanding, Weighted- Average Exercise Price	$ 2.26
Options Outstanding, Weighted Average Remaining Contractual Life	4 years
Options Outstanding, Aggregate Intrinsic Value	$ 2,895,456
Options Exercisable	6,996,622
Options Exercisable, Weighted-Average Exercise Price	$ 2.25
Options Exercisable, Weighted Average Remaining Contractual Life	4 years
Options Exercisable, Aggregate Intrinsic Value	$ 2,895,456
Non-Plan Option Activity [Member]
Note 7 - Stockholder's Equity (Details) - Stock Option Activity [Line Items]
Options Outstanding	443,038
Options Outstanding, Weighted- Average Exercise Price	$ 1.34
Options Outstanding	443,038
Options Outstanding, Weighted- Average Exercise Price	$ 1.34
Options Outstanding, Weighted Average Remaining Contractual Life	4 years 146 days
Options Outstanding, Aggregate Intrinsic Value	$ 159,494
Options Exercisable	443,038
Options Exercisable, Weighted-Average Exercise Price	$ 1.34
Options Exercisable, Weighted Average Remaining Contractual Life	4 years 146 days
Options Exercisable, Aggregate Intrinsic Value	$ 159,494