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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 |  |  |  |  |  |  |

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