DISCONTINUED OPERATIONS (Details Narrative) - USD ($) $ in Thousands			3 Months Ended			12 Months Ended
	Aug. 16, 2019	Jun. 28, 2019	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2020	Dec. 31, 2019
Gain on sale of discontinued subsidiaries							$ 13,686
Carrying value of note				$ 5,096		$ 5,350	5,096
Insurance receivable				1,800		95	1,800
Change in note receivable			$ 194			194
Discontinued Operations [Member]
Reserve for receivable				2,300			2,300
Reynosa Facility Flood [Member]
Insurance proceeds					$ 2,400
Insurance proceeds received						1,800	600
Reynosa Facility Flood [Member] | Discontinued Operations [Member]
Net loss on inventory damaged							782
Reynosa Facility Flood [Member] | Continuing Operations [Member]
Insurance proceeds received						1,700
Insurance receivable				1,800		$ 95	1,800
Transformer Business Units [Member]
Cash purchase price	$ 60,500
Indemnification obligation true deductible	330
Indemnification obligation cap	330
Indemnification obligation per-claim threshold amount	50
Maximum amount Indemnifiable losses set-off	3,300
Indemnification obligation of Interim Breaches cap amount	5,000
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%
Maturity date		Dec. 31, 2022				Dec. 31, 2022
Revaluation of note						$ 254
Carrying value of note						$ 5,300
Cash payment for promissory note				1,800
Change in note receivable			$ 194
Transformer Business Units [Member] | Subordinated Promissory Notes [Member] | First Seller Note [Member]
Principal amount		$ 5,000		$ 3,200			$ 3,200
Transformer Business Units [Member] | Subordinated Promissory Notes [Member] | Second Seller Note [Member]
Principal amount		$ 2,500