Note 10 - Note Payable (Details Textual) - USD ($)					1 Months Ended	3 Months Ended					6 Months Ended	9 Months Ended	26 Months Ended
	Jun. 20, 2014	Jun. 10, 2014	Jun. 10, 2014	Nov. 25, 2013	Nov. 30, 2013	Mar. 31, 2016	Mar. 31, 2016	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2014	Jun. 10, 2014	Sep. 30, 2015	Dec. 17, 2015	Dec. 31, 2015	Jun. 09, 2014	Dec. 31, 2013
Hercules [Member] | Hercules Credit Agreement [Member] | Reclassification from Deferred Financing Fees to Deduction from Debt Liability [Member] | December 31, 2015 [Member]
Prior Period Reclassification Adjustment						$ 26,131
Hercules [Member] | Hercules Credit Agreement [Member] | Reclassification from Deferred Financing Fees to Deduction from Debt Liability [Member]
Current Period Reclassification Adjustment						18,931
Hercules [Member] | Hercules Credit Agreement [Member]
Line of Credit Facility, Maximum Borrowing Capacity					$ 20,000,000
Proceeds from Lines of Credit					$ 5,000,000						$ 10,000,000
Debt Instrument, Basis Spread on Variable Rate													11.25%
Interest Only Payments Period					1 year
Amortization Period for Principal and Interest					2 years 180 days
Debt Issuance Costs, Net					$ 122,378
Debt Instrument, Unamortized Discount					230,000
Hercules [Member]
Repayments of Lines of Credit			$ 5,000,000
Oxford and Horizon [Member]
Repayments of Lines of Credit					$ 4,000,000
Hercules Credit Agreement [Member] | EGEN Inc [Member]
Payments to Acquire Businesses, Gross			$ 3,000,000
Hercules Credit Agreement [Member] | Hercules Warrant [Member] | First Fifty Percent [Member]
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right				97,493
Hercules Credit Agreement [Member] | Hercules Warrant [Member] | Second Fifty Percent [Member]
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right		97,493	97,493								97,493
Hercules Credit Agreement [Member] | Hercules Warrant [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights				$ 3.59
Fair Value Assumptions, Expected Volatility Rate				102.00%
Fair Value Assumptions, Risk Free Interest Rate				1.37%
Fair Value Assumptions, Expected Term				5 years
Share Price				$ 3.55
Line of Credit Facility Original Loan Fee Percent								3.50%
Debt Issuance Costs, Gross								$ 350,000
Hercules Credit Agreement [Member]
Debt Issuance Costs, Net						133,622	$ 133,622							$ 187,894
Interest Expense, Debt						165,527			$ 264,911
Amortization of Debt Issuance Costs						78,671			127,392
EGEN Inc [Member]
Payments to Acquire Businesses, Gross	$ 3,000,000
Share Price	$ 3.48
Reclassification from Deferred Financing Fees to Deduction from Debt Liability [Member] | December 31, 2015 [Member]
Prior Period Reclassification Adjustment						26,131
Reclassification from Deferred Financing Fees to Deduction from Debt Liability [Member]
Current Period Reclassification Adjustment						$ 18,931
Hercules Warrant [Member] | First Fifty Percent [Member]
Debt Instrument, Unamortized Discount										$ 260,928
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right										97,493
Hercules Warrant [Member] | Second Fifty Percent [Member]
Debt Instrument, Unamortized Discount															$ 215,333
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right															97,493
Hercules Warrant [Member]
Debt Issuance Costs, Net																$ 521,763
Fair Value Assumptions, Expected Volatility Rate		104.00%
Fair Value Assumptions, Risk Free Interest Rate		1.69%
Fair Value Assumptions, Expected Term		4 years 182 days
Share Price															$ 3.07
Increase (Decrease) in Other Operating Assets										$ (521,763)
Gain (Loss) From Change In Valuation Of Common Stock Warrant Liability								(18,018)				$ (61,246)
Common Stock Warrant Liability								0
Classification of Warrants to (from) Common Stock Warrant Liability Net								$ (336,254)
Debt Instrument, Basis Spread on Variable Rate							11.50%
Class of Warrant or Right, Exercise Price of Warrants or Rights						$ 6.37	$ 6.37							$ 6.37
Increase (Decrease) in Other Operating Assets						$ (302,656)			(172,136)
Gain (Loss) From Change In Valuation Of Common Stock Warrant Liability									$ (43,228)