Note 14 - License, Collaboration and Distribution Agreements (Details Textual) - USD ($)	1 Months Ended				2 Months Ended	3 Months Ended		12 Months Ended
	Jan. 31, 2013	Oct. 31, 2012	Sep. 30, 2012	Jan. 31, 2012	Oct. 31, 2012	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2014	Dec. 31, 2019
Revenue from Contract with Customer, Including Assessed Tax						$ 1,892,000	$ 1,491,000
Partner Pharmacies [Member] | Revenue Benchmark [Member] | Customer Concentration Risk [Member]
Concentration Risk, Percentage						12.00%	25.00%
Reallocated from Deferred Revenue [Member]
Stockholders' Equity, Period Increase (Decrease), Total					$ 600,000
Avenova Direct [Member]
Revenue from Contract with Customer, Including Assessed Tax						$ 800,000
KN95 Masks [Member]
Contract with Customer, Liability, Total						18,000
Revenue from Contract with Customer, Including Assessed Tax						200,000
KN95 Masks [Member] | Bulk Order Shipped Directly From Manufacturer in China [Member]
Contract with Customer, Liability, Total						600,000			$ 0
China Pioneer [Member]
Proceeds from Issuance or Sale of Equity, Total			$ 2,500,000
Unit Purchase Agreement Shares Per Unit (in shares)			1
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)			1
Excess Fair Value Over Proceeds Received From Purchase					$ 1,000,000
China Pioneer [Member] | Tranche One [Member]
Purchase Agreement Units (in shares)			800,000
China Pioneer [Member] | Tranche Two [Member]
Purchase Agreement Units (in shares)		1,200,000
Purchase Agreement Unit Price Per Share (in dollars per share)		$ 1.25
Purchase Unit Agreement Total Units Fair Value		$ 3,500,000
China Pioneer [Member] | NeutroPhase [Member]
Proceeds from Collaborators	$ 312,500			$ 312,500				$ 625,000
Maximum Possible Sales Discounts			$ 500,000
Contract with Customer, Liability, Revenue Recognized						173	$ 0
China Pioneer and Principal Business Enterprise Inc. [Member] | Samples and Future Products [Member]
Contract with Customer, Liability, Revenue Recognized						0	41,000
McKesson Corporation [Member] | Avenova Product [Member]
Contract with Customer, Liability, Revenue Recognized						600,000	$ 1,200,000
McKesson Corporation [Member] | Avenova Product [Member] | Accounts Payable and Accrued Liabilities [Member]
Contract with Customer, Liability, Total						300,000			400,000
McKesson Corporation [Member] | Avenova Product [Member] | Prepaid Expenses and Other Current Assets [Member]
Contract with Customer, Rebate Liability, Current						$ 300,000			$ 400,000