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OTHER ASSETS (Details Narrative) - USD ($) $ in Thousands		3 Months Ended
	Jun. 28, 2019	Mar. 31, 2021	Jun. 30, 2020	Dec. 31, 2019	Dec. 31, 2020	Aug. 16, 2019
Right of use assets		$ 1,267			$ 1,505
Carrying value of note		$ 5,457			$ 5,350
Transformer Business Units [Member]
Purchase price of divestiture	$ 68,000
Transformer Business Units [Member] | Subordinated Promissory Notes [Member]
Principal amount						$ 7,500
Interest rate		4.00%
Maturity date		Dec. 31, 2022
Cash payment for promissory note				$ 1,800
Revaluation of note		$ 107
Carrying value of note		$ 5,500
Change in note receivable			$ 194
Transformer Business Units [Member] | Subordinated Promissory Notes [Member] | First Seller Note [Member]
Principal amount				$ 3,200		5,000
Transformer Business Units [Member] | Subordinated Promissory Notes [Member] | Second Seller Note [Member]
Principal amount						$ 2,500

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