The amount of reduction to the principal amount of a note rececivable during the period.

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Amount of cash and noncash consideration received from divesting a business unit.

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Amount of working capital (deficit) as of the balance sheet date.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Face (par) amount of debt instrument at time of issuance.

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The increase (decrease) during the reporting period of the amounts due from borrowers for outstanding secured or unsecured loans evidenced by a note.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount, before allowance for credit loss, of financing receivable.

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Amount, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement.

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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The cash inflow from the additional capital contribution to the entity.

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The cash outflow for a borrowing supported by a written promise to pay an obligation.

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Price of a single share of a number of saleable stocks of a company.

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Number of new stock issued during the period.

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BASIS OF PRESENTATION (Details Narrative) $ / shares in Units, $ in Thousands			3 Months Ended		12 Months Ended
	Jun. 28, 2019 USD ($)	Sep. 24, 2013 USD ($) $ / shares shares	Jun. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2020 USD ($) Segment	Mar. 31, 2021 USD ($)	Apr. 13, 2020 USD ($)
Number of reportable segments \| Segment					2
Cash and cash equivalents				$ 8,213	$ 7,567
Working capital					8,400
Change in note receivable			$ 194		194
Carrying value of note				5,096	5,350
Long-term debt					633
Current debt					780
PPP Loan [Member]
Long-term debt					633
Current debt					780
Loan face value							$ 1,404
IPO [Member]
Issuance of common stock		$ 7,900
Issuance of common stock (in shares) \| shares		1,265,000
Share price \| $ / shares		$ 7.00
Transformer Business Units [Member]
Purchase price of divestiture	$ 68,000
Transformer Business Units [Member] \| Subordinated Promissory Notes [Member]
Principal amount	7,500
Change in note receivable			$ 194
Cash payment for promissory note				1,800
Revaluation of note					254
Carrying value of note					$ 5,300
Transformer Business Units [Member] \| Subordinated Promissory Notes [Member] \| First Seller Note [Member]
Principal amount	5,000			$ 3,200
Transformer Business Units [Member] \| Subordinated Promissory Notes [Member] \| Second Seller Note [Member]
Principal amount	$ 2,500
Subsequent Event [Member]
Irrevocable standby letter of credit						$ 1,800