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DISCONTINUED OPERATIONS (Details Narrative) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended	12 Months Ended
	Aug. 16, 2019	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019	Jun. 30, 2020	Dec. 31, 2019	Jun. 28, 2019
Insurance receivable		$ 33	$ 1,800		$ 33	$ 1,800
Change in note receivable					194
Carrying value of note		$ 5,136	5,096		$ 5,136	5,096
Transformer Business Units [Member]
Cash purchase price	$ 60,500
Transformer Business Units [Member] | Subordinated Promissory Notes [Member]
Principal amount							$ 7,500
Interest rate		4.00%			4.00%
Maturity date					Dec. 31, 2022
Cash payment for promissory note			1,800
Change in note receivable		$ 194
Revaluation of note		40
Carrying value of note		5,100			$ 5,100
Transformer Business Units [Member] | Subordinated Promissory Notes [Member] | First Seller Note [Member]
Principal amount			3,200			3,200	5,000
Transformer Business Units [Member] | Subordinated Promissory Notes [Member] | Second Seller Note [Member]
Principal amount							$ 2,500
Reynosa Facility Flood [Member]
Insurance proceeds				$ 2,400
Insurance proceeds received					1,800	600
Discontinued Operations [Member] | Reynosa Facility Flood [Member]
Net loss on inventory damaged						782
Continuing Operations [Member] | Reynosa Facility Flood [Member]
Insurance receivable		$ 33	$ 1,800		$ 33	$ 1,800

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