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BASIS OF PRESENTATION (Details Narrative)
 3 Months Ended 12 Months Ended
Nov. 08, 2021
USD ($)
$ / shares
shares
Jul. 07, 2021
USD ($)
$ / shares
Jun. 01, 2021
$ / shares
Oct. 20, 2020
USD ($)
Jun. 28, 2019
USD ($)
Sep. 24, 2013
USD ($)
$ / shares
shares
Mar. 31, 2021
USD ($)
Jun. 30, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2021
USD ($)
N
$ / shares
Dec. 31, 2020
USD ($)
$ / shares
Apr. 13, 2020
USD ($)
Aug. 16, 2019
USD ($)
Number of additional locations | N                   3      
Number of shares issued | shares 888,500                        
Net proceeds from stock issued $ 8,700,000                 $ 8,663,000    
Number of reportable segments | N                   2      
Change in note receivable                   194,000    
Cash                   9,924,000 $ 7,567,000    
Working capital                   $ 18,600,000      
Common stock, par value (in dollars per share) | $ / shares                   $ 0.001 $ 0.001    
Dividend paid                   $ 1,047,000    
Aggregate price market sale agreement       $ 9,000,000                  
Gross proceeds from stock issued $ 9,000,000                 8,663,000      
Price per share | $ / shares $ 10.1288                        
Costs related to common shares issued $ 273,000                        
Placement fee (percent) 3.00%                        
Placement fee $ 270,000                        
Irrevocable standby letter of credit                   1,800,000      
Restricted Cash                   1,775,000    
Gain on extinguishment of debt                   1,417,000    
Dividend Declared [Member]                          
Dividend date declared     Jun. 01, 2021                    
Dividend amount (in dollars per share) | $ / shares     $ 0.12                    
Dividend record date     Jun. 22, 2021                    
Dividend payment date     Jul. 07, 2021                    
Dividend Paid [Member]                          
Dividend amount (in dollars per share) | $ / shares   $ 0.12                      
Common stock, par value (in dollars per share) | $ / shares   $ 0.001                      
Dividend paid   $ 1,000,000                      
PPP Loan [Member]                          
Loan face value                       $ 1,404,000  
Gain on extinguishment of debt             $ 1,400,000     1,400,000      
Transformer Business Units [Member]                          
Purchase price of divestiture         $ 68,000,000                
Transformer Business Units [Member] | Subordinated Debt [Member]                          
Principal amount         7,500,000               $ 7,500,000
Cash payment for promissory note                 $ 1,800,000        
Change in note receivable               $ 194,000          
Revaluation of note                   428,000      
Carrying value of note                   5,800,000      
Transformer Business Units [Member] | Subordinated Debt [Member] | First Seller Note [Member]                          
Principal amount         5,000,000       $ 3,200,000       5,000,000
Transformer Business Units [Member] | Subordinated Debt [Member] | Second Seller Note [Member]                          
Principal amount         $ 2,500,000               $ 2,500,000
Transformer Business Units [Member] | Subordinated Promissory Notes [Member]                          
Carrying value of note                   $ 5,800,000      
IPO [Member]                          
Number of shares issued | shares           1,265,000              
Share Price | $ / shares           $ 7.00              
Net proceeds from stock issued           $ 7,900,000