Note 9 - Fair Value Measurements (Details) - Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques - Warrant [Member] - USD ($)							9 Months Ended	12 Months Ended
	Aug. 12, 2013	Jul. 12, 2013	Feb. 14, 2013	Nov. 20, 2012	Jul. 26, 2012	Sep. 10, 2010	Dec. 31, 2015	Mar. 31, 2015
Warrant Issued 09-10-2010 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Warrant, Expiration Date						Sep. 10, 2019	Sep. 10, 2019	Sep. 10, 2019
Warrant, Number of Warrants						136,920	136,920	136,920
Warrant, Exercise Price						$ 6.70	$ 6.70	$ 6.70
Warrant, Fair Market Value Per Share						$ 6.70	$ 4.85	$ 6.42
Warrant, Put Option						$ 0.2851	$ 580,541	$ 68,460
Warrant, Market Price Option						$ 9	$ 0	$ 0
Warrant, Expected Volatility						2.81%	3.70%	4.45%
Warrant, Remaining Life in Years						267848 years	580541 years	68460 years
Warrant Issued 09-10-2010 #2 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Warrant, Expiration Date						Sep. 10, 2015		Sep. 10, 2015
Warrant, Number of Warrants						10,416		10,416
Warrant, Exercise Price						$ 6.70		$ 6.70
Warrant, Fair Market Value Per Share						$ 6.70		$ 6.42
Warrant, Put Option						$ 0.2851		$ 0
Warrant, Market Price Option						$ 5		$ 0
Warrant, Expected Volatility						1.59%		0.45%
Warrant, Remaining Life in Years						13808 years		7002 years
Warrant Issued 07-26-2012 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Warrant, Expiration Date					Sep. 10, 2019		Sep. 10, 2019	Sep. 10, 2019
Warrant, Number of Warrants					50,000		50,000	50,000
Warrant, Exercise Price					$ 3.35		$ 3.35	$ 3.35
Warrant, Fair Market Value Per Share					$ 3.90		$ 4.85	$ 6.42
Warrant, Put Option					$ 0.4204		$ 212,000	$ 30,000
Warrant, Market Price Option					$ 7		$ 75,000	$ 153,500
Warrant, Expected Volatility					0.94%		3.70%	4.45%
Warrant, Remaining Life in Years					66193 years		212000 years	153500 years
Warrant Issued 07-26-2012 #2 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Warrant, Expiration Date					Sep. 10, 2019		Sep. 10, 2019	Sep. 10, 2019
Warrant, Number of Warrants					20,000		20,000	20,000
Warrant, Exercise Price					$ 3.35		$ 3.35	$ 3.35
Warrant, Fair Market Value Per Share					$ 3.90		$ 4.85	$ 6.42
Warrant, Put Option					$ 0.4204		$ 84,800	$ 13,200
Warrant, Market Price Option					$ 7		$ 30,000	$ 61,400
Warrant, Expected Volatility					0.94%		3.70%	4.45%
Warrant, Remaining Life in Years					26477 years		84800 years	61400 years
Warrant Issued 11-20-2012 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Warrant, Expiration Date				Sep. 10, 2019			Sep. 10, 2019	Sep. 10, 2019
Warrant, Number of Warrants				20,000			20,000	20,000
Warrant, Exercise Price				$ 3.56			$ 3.56	$ 3.56
Warrant, Fair Market Value Per Share				$ 3.50			$ 4.85	$ 6.42
Warrant, Put Option				$ 0.4245			$ 84,800	$ 13,200
Warrant, Market Price Option				$ 6.83			$ 25,800	$ 57,200
Warrant, Expected Volatility				1.09%			3.70%	4.45%
Warrant, Remaining Life in Years				21441 years			84800 years	57200 years
Warrant Issued 02-14-2013 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Warrant, Expiration Date			Sep. 10, 2019				Sep. 10, 2019	Sep. 10, 2019
Warrant, Number of Warrants			20,000				20,000	20,000
Warrant, Exercise Price			$ 3.58				$ 3.58	$ 3.58
Warrant, Fair Market Value Per Share			$ 3.80				$ 4.85	$ 6.42
Warrant, Put Option			$ 0.4125				$ 84,800	$ 13,200
Warrant, Market Price Option			$ 6.58				$ 23,600	$ 55,000
Warrant, Expected Volatility			1.43%				3.70%	4.45%
Warrant, Remaining Life in Years			23714 years				84800 years	55000 years
Warrant Issued 07-12-2013 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Warrant, Expiration Date		Sep. 10, 2019					Sep. 10, 2019	Sep. 10, 2019
Warrant, Number of Warrants		20,000					20,000	20,000
Warrant, Exercise Price		$ 3.33					$ 3.33	$ 3.33
Warrant, Fair Market Value Per Share		$ 3.32					$ 4.85	$ 6.42
Warrant, Put Option		$ 0.4026					$ 84,800	$ 13,200
Warrant, Market Price Option		$ 6.17					$ 30,400	$ 61,800
Warrant, Expected Volatility		2.00%					3.70%	4.45%
Warrant, Remaining Life in Years		19523 years					84800 years	61800 years
Warrant Issued 08-12-2013 [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Warrant, Expiration Date	Sep. 10, 2019						Sep. 10, 2019	Sep. 10, 2019
Warrant, Number of Warrants	20,000						20,000	20,000
Warrant, Exercise Price	$ 3.69						$ 3.69	$ 3.69
Warrant, Fair Market Value Per Share	$ 3.69						$ 4.85	$ 6.42
Warrant, Put Option	$ 0.4020						$ 84,800	$ 13,200
Warrant, Market Price Option	$ 6.08						$ 23,200	$ 54,600
Warrant, Expected Volatility	2.01%						3.70%	4.45%
Warrant, Remaining Life in Years	21587 years						84800 years	54600 years