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Note 8 - Equity (Details Textual) - USD ($)
3 Months Ended 6 Months Ended
Apr. 01, 2022
Oct. 01, 2021
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Jul. 01, 2022
Jan. 03, 2022
Dec. 31, 2021
Sep. 15, 2021
Jun. 04, 2021
Dec. 31, 2020
Class Of Stock [Line Items]                        
Common stock, shares issued     32,236,177   32,236,177       31,873,428      
Common stock, shares authorized     50,000,000   50,000,000       50,000,000      
Preferred stock, shares authorized     1,000,000   1,000,000       1,000,000      
Preferred stock, par value     $ 0.01   $ 0.01       $ 0.01      
Preferred stock, shares outstanding     500   500       500      
Conversion price         $ 0.20              
Awards outstanding     70,000   70,000              
Contractual life of warrants     4 years 3 months 18 days   4 years 3 months 18 days              
Series A preferred stock                        
Class Of Stock [Line Items]                        
Preferred stock, shares authorized     20,000   20,000       20,000      
Preferred stock, par value     $ 0.01   $ 0.01              
Preferred stock, shares outstanding     500   500       500      
Preferred stock, dividend rate percentage         10.00%              
Preferred stock, per share issuance price         $ 100              
Director [Member]                        
Class Of Stock [Line Items]                        
Common stock, shares issued 9,708             165,700        
Preferred stock, shares authorized     1,000,000   1,000,000              
Minimum [Member]                        
Class Of Stock [Line Items]                        
Percentage of RSUs granted to executives   0.00%                    
Maximum [Member]                        
Class Of Stock [Line Items]                        
Percentage of RSUs granted to executives   300.00%                    
Maximum [Member] | Series A preferred stock                        
Class Of Stock [Line Items]                        
Preferred dividends undeclared     $ 100   $ 100              
Restricted Stock Awards [Member]                        
Class Of Stock [Line Items]                        
Stock-based award activity     192,380 213,545 192,380 213,545     237,621     153,200
Compensation expense related to these share-based payments     $ 100,000 $ 100,000 $ 100,000 $ 100,000            
Unrecognized costs from stock-based awards     300,000   $ 300,000              
Unrecognized compensation cost recognition period         3 months 18 days              
Granted to executives         138,262 90,517            
Value of award     300,000   $ 300,000              
Restricted Stock Awards [Member] | Employees [Member]                        
Class Of Stock [Line Items]                        
Granted to executives 138,262                      
Restricted Stock Units [Member]                        
Class Of Stock [Line Items]                        
Unrecognized costs from stock-based awards     $ 4,300,000   $ 4,300,000              
Unrecognized compensation cost recognition period         3 years 7 months 6 days              
Restricted Stock Units [Member] | Employees [Member]                        
Class Of Stock [Line Items]                        
Granted to executives   1,220,930                    
Restricted Stock Units [Member] | Minimum [Member]                        
Class Of Stock [Line Items]                        
Percentage of number of units granted at vesting date that entitle recipients to shares of common stock         0.00%              
Restricted Stock Units [Member] | Maximum [Member]                        
Class Of Stock [Line Items]                        
Percentage of number of units granted at vesting date that entitle recipients to shares of common stock         300.00%              
2020 Equity Incentive Plan [Member]                        
Class Of Stock [Line Items]                        
Common stock shares available for issuance                   1,500,000    
Common stock remaining shares available for future issuance     841,683   841,683              
2020 Equity Incentive Plan [Member] | Minimum [Member]                        
Class Of Stock [Line Items]                        
Common stock shares available for issuance                   3,620,000    
2020 Equity Incentive Plan [Member] | Maximum [Member]                        
Class Of Stock [Line Items]                        
Common stock shares available for issuance                   5,120,000    
Operating Partnership [Member]                        
Class Of Stock [Line Items]                        
Operating partnership percentage         92.20%              
OP Unit Redemption [Member]                        
Class Of Stock [Line Items]                        
Common stock, shares issued 60,106           36,064          
OP Unit Redemption [Member] | Operating Partnership [Member]                        
Class Of Stock [Line Items]                        
Common stock, shares issued 60,106           36,064          
Lamont Street [Member]                        
Class Of Stock [Line Items]                        
Warrants to purchase of common stock                     200,000  
Warrants to purchase of common stock, Exercise price                     $ 2.50