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Note 9 - Stockholders' Equity (Details Textual)													3 Months Ended		12 Months Ended
	Mar. 16, 2017 $ / shares shares	Mar. 15, 2017 USD ($) $ / shares shares	Dec. 29, 2016	Mar. 08, 2016 USD ($) shares	Nov. 11, 2015 USD ($) $ / shares shares	Oct. 29, 2015 USD ($) $ / shares shares	Sep. 23, 2015 USD ($) $ / shares shares	Mar. 15, 2015 shares	Mar. 09, 2015 $ / shares shares	Nov. 13, 2014 USD ($) $ / shares shares	Nov. 08, 2013 USD ($) shares	Oct. 25, 2013 $ / shares shares	Mar. 31, 2017 USD ($) $ / shares shares	Mar. 31, 2016 USD ($)	Dec. 31, 2016 USD ($) $ / shares shares	Nov. 30, 2016 $ / shares	Nov. 30, 2015 $ / shares	Oct. 31, 2015 $ / shares
Preferred Stock, Shares Authorized													5,000,000
Preferred Stock, Par or Stated Value Per Share | $ / shares													$ 0.0001
Dividends Payable | $													$ 200,625	$ 200,625
Payments of Stock Issuance Costs | $													5,946	31,704
Class of Warrant or Right, Number of Securities Called by Warrants or Rights									47,917
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares									$ 2.52
Term Of Warrant									1 year
Class of Warrant or Right, Nonemployee Compensation Expense | $														11,625
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Fair Value Amount | $													$ 2,660,122
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures													0
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate													1.93%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term													4 years 182 days
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate													0.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate													137.80%
September 2015 Warrants [Member]
Debt Instrument, Unamortized Discount | $							$ 92,199
Fair Value Adjustment of Warrants | $														2,375
Promissory Note [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights							69,445
Warrants Issued Under PISPA [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings | $														$ 2,337
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value | $															$ 0
Fair Value, Inputs, Level 3 [Member] | Warrants Issued Under PISPA [Member]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issuances | $											$ 325,891
Common Stock [Member]
Share Price | $ / shares																$ 3.60	$ 3.60
Private Investor SPA [Member]
Stock Issued During Period, Value, New Issues | $											$ 3,697,100
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares												$ 6
Term Of Warrant											3 years
Placement Agent Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights											82,158
Commissions and Fees, Percent of Gross Proceeds											8.00%
Private Investor SPA [Member]
Stock Issued During Period, Shares, New Issues										664,584		1,026,972
Class of Warrant or Right, Number of Securities Called by Warrants or Rights										996,877
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares										$ 3.60						$ 3.60
Term Of Warrant										5 years
Proceeds from Issuance of Private Placement | $										$ 1,595,000
Private Investor SPA [Member] | Common Stock [Member]
Stock Issued During Period, Shares, New Issues												1,026,972
Private Investor SPA [Member] | Warrant [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights												1,026,972
Director [Member]
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures				8,333				1,895
Stock Granted, Value, Share-based Compensation, Net of Forfeitures | $		$ 5,003		$ 16,000
Four Members of the Board of Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures		40,000
Employee [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures		4,167
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price | $ / shares		$ 2.64
Employee [Member] | Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		3 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period		7 years
Certain Officers, Employees, and Contractors [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	1,120,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price | $ / shares	$ 2.65
Certain Officers, Employees, and Contractors [Member] | Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	7 years
Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio			12										12		12
Series A-1 Convertible Preferred Stock [Member]
Preferred Stock, Shares Authorized													100,000		100,000
Preferred Stock, Par or Stated Value Per Share | $ / shares													$ 0.0001		$ 0.0001
Preferred Stock, Shares Outstanding													90,000		90,000
Stock Issued During Period, Shares, New Issues					5,500	84,500
Share Price | $ / shares					$ 100	$ 100
Proceeds from Issuance of Convertible Preferred Stock | $					$ 550,000	$ 8,450,000
Initial Conversion Price | $ / shares					$ 3.60	$ 3.60											$ 3.60	$ 3.60
Preferred Stock, Dividend Rate, Percentage					6.00%
Period Preceding the Dividend Payment Date					10 days
Liquidation Value Per Share | $ / shares					$ 100
Dividends Payable | $													$ 405,000		$ 270,000
Preferred Stock, Shares Issued													90,000		90,000
Series A-1 Convertible Preferred Stock [Member] | Maximum [Member]
Maximum Ownership as a Result of Conversion					9.99%
Series B-1 Convertible Preferred Stock [Member]
Preferred Stock, Shares Authorized													105,000		105,000
Preferred Stock, Par or Stated Value Per Share | $ / shares													$ 0.0001		$ 0.0001
Preferred Stock, Shares Outstanding													105,000		105,000
Stock Issued During Period, Shares, New Issues					105,000
Share Price | $ / shares					$ 100
Proceeds from Issuance of Convertible Preferred Stock | $					$ 10,500,000
Initial Conversion Price | $ / shares					$ 3.60													$ 3.60
Preferred Stock, Dividend Rate, Percentage					2.50%
Period Preceding the Dividend Payment Date					10 days
Liquidation Value Per Share | $ / shares					$ 100
Dividends Payable | $													$ 196,875		$ 131,250
Preferred Stock, Shares Issued													105,000		105,000
Series B-1 Convertible Preferred Stock [Member] | Maximum [Member]
Maximum Ownership as a Result of Conversion					9.99%
September 2015 Warrants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares							$ 3.60
Term Of Warrant							5 years

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Value, after forfeitures, of stock or other type of equity granted of any equity-based compensation plan other than an employee stock ownership plan (ESOP).

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Number of new stock issued during the period.

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