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Note 2 - Summary of Significant Accounting Policies (Tables)
6 Months Ended
Jun. 30, 2022
Notes Tables  
Schedule of Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Table Text Block]
  

June 30,

  

December 31,

 
  

2022

  

2021

 

Cash and cash equivalents

 $3,931  $7,504 

Restricted cash included in other assets

  155   475 

Total cash, cash equivalents, and restricted cash in the condensed consolidated balance sheets

 $4,086  $7,979 
Schedules of Concentration of Risk, by Product [Table Text Block]
  

Three Months Ended June 30,

  

Six Months Ended June 30,

 
  

2022

  

2021

  

2022

  

2021

 

Avenova

 $1,626  $1,883  $3,052  $3,458 

DERMAdoctor

  592      1,483    

NeutroPhase

  509   175   657   175 

Other products

  316   68   474   294 

Total product revenue, net

 

3,043

   2,126   5,666   3,927 

Other revenue, net

  2   7   8   13 

Total sales, net

 $3,045  $2,133  $5,674  $3,940 
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]
  

June 30,

  

December 31,

 

Major distribution partner

 

2022

  

2021

 

Avenova Spray Pharmacy Distributor A

  38

%

  11

%

Avenova Spray Pharmacy Distributor B

  13

%

  13

%

Amazon

  12

%

  *

%

Major U.S. Retailer A  10

%

  *

%

Major U.S. Retailer B  *%  33%
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
  

Three Months Ended June 30,

  

Six Months Ended June 30,

 

Numerator

 

2022

  

2021

  

2022

  

2021

 

Net loss

 $(2,155

)

 $(1,859

)

 $(2,266

)

 $(3,377

)

                 

Denominator

                

Weighted average shares of common stock outstanding, basic and diluted

  52,735   42,561   51,419   42,174 

Net loss per share, basic and diluted

 $(0.04

)

 $(0.04

)

 $(0.04

)

 $(0.08

)

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
  

As of June 30,

 
  

2022

  

2021

 
Series B Preferred  29,050    

Stock options

  4,446   3,873 

Stock warrants

  44,582   7,082 
   78,078   10,955