Note 10 - Stockholder's Equity (Details) - Stock Option Activity (USD $)	3 Months Ended
	Mar. 31, 2014		Dec. 31, 2013
2012 Omnibus Incentive Plan [Member]
Note 10 - Stockholder's Equity (Details) - Stock Option Activity [Line Items]
Options Outstanding	1,332,542		1,280,042
Options Outstanding, Weighted- Average Exercise Price	$ 2.03		$ 1.99
Options Outstanding, Weighted Average Remaining Contractual Life	9 years 73 days
Options Outstanding, Aggregate Intrinsic Value	$ 1,644,961
Options Exercisable	216,250
Options Exercisable, Weighted-Average Exercise Price	$ 2.25
Options Exercisable, Weighted Average Remaining Contractual Life	8 years 219 days
Options Exercisable, Aggregate Intrinsic Value	220,388
Options Granted	67,500
Options Granted, Weighted-Average Exercise Price	$ 2.76
Options Forfeited or Expired	(15,000)
Options Forfeited or Expired, Weighted-Average Exercise Price	$ 1.79
2006 Stock Incentive Plan [Member]
Note 10 - Stockholder's Equity (Details) - Stock Option Activity [Line Items]
Options Outstanding	7,371,634		7,415,051
Options Outstanding, Weighted- Average Exercise Price	$ 2.35		$ 2.36
Options Outstanding, Weighted Average Remaining Contractual Life	5 years 146 days
Options Outstanding, Aggregate Intrinsic Value	9,418,725
Options Exercisable	6,418,455	[1]
Options Exercisable, Weighted-Average Exercise Price	$ 2.12	[1]
Options Exercisable, Weighted Average Remaining Contractual Life	5 years	[1]
Options Exercisable, Aggregate Intrinsic Value	9,418,058	[1]
Options Forfeited or Expired	(43,417)
Options Forfeited or Expired, Weighted-Average Exercise Price	$ 3.95
Non-Plan Option Activity [Member]
Note 10 - Stockholder's Equity (Details) - Stock Option Activity [Line Items]
Options Outstanding	443,038		443,038
Options Outstanding, Weighted- Average Exercise Price	$ 1.34		$ 1.34
Options Outstanding, Weighted Average Remaining Contractual Life	5 years 219 days
Options Outstanding, Aggregate Intrinsic Value	850,633
Options Exercisable	443,038
Options Exercisable, Weighted-Average Exercise Price	$ 1.34
Options Exercisable, Weighted Average Remaining Contractual Life	5 years 219 days
Options Exercisable, Aggregate Intrinsic Value	$ 850,633

[1] Includes 71,352 exercisable options to purchase common stock at a weighted average exercise price of $3.64 per share being held by consultants.