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DISCONTINUED OPERATIONS (Details Narrative) - USD ($) $ in Thousands		3 Months Ended			12 Months Ended
	Aug. 16, 2019	Mar. 30, 2020	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2019	Jun. 28, 2019	Dec. 31, 2018
Cash purchase price					$ 39,923
Gain on sale of discontinued subsidiaries					13,686
Carrying value of note			$ 5,096		5,096		$ 865
Insurance receivable			1,800		1,800
Discontinued Operations [Member]
Reserve for receivable			2,300		2,300
Reynosa Facility Flood [Member]
Insurance proceeds				$ 2,400
Insurance proceeds received					600
Reynosa Facility Flood [Member] | Subsequent Event [Member]
Insurance proceeds received		$ 1,400
Reynosa Facility Flood [Member] | Discontinued Operations [Member]
Net loss on inventory damaged					782
Reynosa Facility Flood [Member] | Continuing Operations [Member]
Insurance receivable			$ 1,800		1,800
Transformer Business Units [Member]
Cash purchase price	$ 60,500				45,200
Gain on sale of discontinued subsidiaries					$ 13,700
Maximum amount Indemnifiable losses set-off	5,000
Indemnification obligation true deductible	330
Indemnification obligation cap	330
Indemnification obligation per-claim threshold amount	50
Indemnification obligation of Interim Breaches cap amount	3,300
Indemnification obligation of legal matters true deductible	150
Indemnification obligation of legal matters cap amount	3,300
Indemnification obligation of buyer deductible	330
Indemnification obligation of buyer cap	$ 3,300
Transformer Business Units [Member] | Subordinated Promissory Notes [Member]
Principal amount						$ 7,500
Interest rate			4.00%		4.00%	4.00%
Maturity date					Dec. 31, 2022
Revaluation of note					$ 651
Carrying value of note			$ 5,100		5,100
Cash payment for promissory note			1,700
Transformer Business Units [Member] | Subordinated Promissory Notes [Member] | First Seller Note [Member]
Principal amount			$ 3,300		$ 3,300	$ 5,000
Transformer Business Units [Member] | Subordinated Promissory Notes [Member] | Second Seller Note [Member]
Principal amount						$ 2,500

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