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Note 10 - Equity, Share-based Compensation, Warrants and Securities Offerings (Tables)
12 Months Ended
Dec. 31, 2022
Notes Tables  
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
  

2022

  

2021

 

Restricted stock units

 $1,160  $866 

Stock options

  101   140 

Common stock

  -   108 

Compensation expense related to common stock awards issued under equity incentive plan

 $1,261  $1,114 
Share-Based Payment Arrangement, Activity [Table Text Block]
  

2022

  

2021

 
  

Shares Issued

  

Weighted

Average
Grant
Date Fair Value

Per Share

  

Shares

Issued

  

Weighted

Average
Grant
Date Fair Value

Per Share

 

Directors

  34,875  $6.71   13,608  $7.95 

Employees

  89,307   5.75   57,250   5.52 

Consultant

  13,516   6.47   -    
   137,698       70,858    
Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]
  

RSUs

  

SUs

 
  

Number of

Units

  

Unrecognized Compensation

(in thousands)

  

Average

Grant Date

Fair Value

per share

  

Weighted

Average

Expense

Period

(Years)

  

Number of

Units

  

Unrecognized Compensation

(in thousands)

  

Average

Grant Date

Fair Value

per share

  

Weighted

Average

Expense

Period

(Years)

 

Nonvested at January 1, 2021

  149,540  $730  $4.88   1.4   -  $-  $-  $- 

Granted

  82,469   796   9.65   1.0   -   -   -   - 

Forfeited

  (291)  (3)  10.31   0.7   -   -   -   - 

Vested with service

  (105,115)  -       -   -   -   -   - 

Expensed

  -   (865) 

NA

   -   -   -   -   - 

Nonvested at December 31, 2021

  126,603   658   5.20   0.9   -   -   -   - 

Granted

  527,871   1,680   3.18   2.7   160,000   216   1.35   3.0 

Impact of Modification:

                  -   -   -   - 

Before modification

  (17,050)  (150)  8.77   0.6   -   -   -   - 

After modification

  17,050   64   3.73   -   -   -   -   - 

Forfeited

  (11,744)  (68)  5.77   1.1   -   -   -   - 

Vested with Service

  (275,912)  -       -   -   -   -   - 

Expensed

  -   (1,160) 

NA

   -   -   (15) 

NA

   - 

Nonvested at December 31, 2022

  366,818  $1,024  $2.79   2.8   160,000  $201  $1.26   2.7 
  

Number of

RSUs

 

Vested at January 1, 2021

  38,640 

Vested with service

  105,115 

Issued at vesting

  (57,250)

Vested at December 31, 2021

  86,505 

Vested with service

  275,912 

Issued at vesting

  (83,725)

Issued at termination of service

  (53,967)

Vested at December 31, 2022

  224,725 
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
  

2022

  

2021

 
  

Shares Under

Warrants

  

Weighted

Average

Exercise

Price

  

Weighted

Average

Remaining

Contractual

Life (Years)

  

Shares Under

Warrants

  

Weighted

Average

Exercise

Price

  

Weighted

Average

Remaining

Contractual

Life (Years)

 

Outstanding at January 1

  875,067  $9.76   1.4   664,592  $9.82   1.1 

Issued

  2,063,000   1.61   3.1   230,769  $10.00   5.0 

Impact of Warrant A exercise price adjustment:

                        

Before adjustment

  230,769   10.00   4.0           

After adjustment

  (230,769)  2.72   4.0           

Cash exercised

            (17,794)  9.60   0.8 

Expired

  (639,298)  9.60   -   (2,500)  52.50   - 

Outstanding at December 31

  2,298,769  $1.76   2.9   875,067  $9.76   1.4 
Schedule of Share-based Compensation Warrants by Exercise Price Range [Table Text Block ]
    

Outstanding

  

Exercisable

 

Exercise Prices

  

Shares

Under

Warrants

  

Weighted

Average

Exercise

Price

  

Weighted

Average

Remaining

Contractual

Life (Years)

  

Shares

Under

Warrants

  

Weighted

Average

Exercise

Price

  

Weighted

Average

Remaining

Contractual

Life (Years)

 
$1.60   2,000,000  $1.60   2.8   -  $-   - 
$1.88   63,000   1.88   4.8   -   -   - 
$2.72   230,769   2.72   3.7   230,769   2.72   3.7 
$20.00   5,000   20.00   0.1   5,000   20.00   0.1 
     2,298,769  $1.76   2.9   235,769  $3.09   3.6