SEGMENT REPORTING (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Jan. 31, 2020
Segment Reporting Information
Revenues	$ 60,148	$ 49,544
Cost of revenues	56,139	70,570
Gross (loss) profit	4,009	(21,026)
Selling, general and administrative expenses	10,344	9,588
Impairment loss		2,072
(Loss) income from operations	(6,335)	(32,686)
Other income, net	1,088	2,252
(Loss) income before income taxes	(5,247)	(30,434)
Income tax benefit	4,454	521
Net loss	(793)	(29,913)
Amortization of intangibles assets	225	299
Depreciation	937	829
Property, plant and equipment additions	684	1,985
Current assets	455,736	373,161	$ 421,755
Current liabilities	173,106	71,026	144,034
Goodwill	27,943	30,766	27,943
Total assets	512,964	433,161	$ 487,540
Other
Segment Reporting Information
Selling, general and administrative expenses	1,805	1,570
(Loss) income from operations	(1,805)	(1,570)
Other income, net	64	152
(Loss) income before income taxes	(1,741)	(1,418)
Depreciation	1	1
Property, plant and equipment additions		11
Current assets	113,633	55,194
Current liabilities	455	669
Total assets	113,963	56,345
Power Services
Segment Reporting Information
Revenues	48,612	20,203
Cost of revenues	45,710	44,526
Gross (loss) profit	2,902	(24,323)
Selling, general and administrative expenses	5,928	5,646
Impairment loss		2,072
(Loss) income from operations	(3,026)	(32,041)
Other income, net	1,024	2,100
(Loss) income before income taxes	(2,002)	(29,941)
Amortization of intangibles assets	60	87
Depreciation	170	168
Property, plant and equipment additions	380	1,062
Current assets	316,753	281,759
Current liabilities	163,674	52,829
Goodwill	18,476	18,476
Total assets	348,577	310,354
Industrial Services
Segment Reporting Information
Revenues	9,744	27,069
Cost of revenues	8,982	24,271
Gross (loss) profit	762	2,798
Selling, general and administrative expenses	2,123	1,861
(Loss) income from operations	(1,361)	937
(Loss) income before income taxes	(1,361)	937
Amortization of intangibles assets	165	166
Depreciation	667	560
Property, plant and equipment additions	210	815
Current assets	22,916	33,315
Current liabilities	8,184	16,909
Goodwill	9,467	12,290
Total assets	46,411	61,893
Telecom Services
Segment Reporting Information
Revenues	1,792	2,272
Cost of revenues	1,447	1,773
Gross (loss) profit	345	499
Selling, general and administrative expenses	488	511
(Loss) income from operations	(143)	(12)
(Loss) income before income taxes	(143)	(12)
Amortization of intangibles assets		46
Depreciation	99	100
Property, plant and equipment additions	94	97
Current assets	2,434	2,893
Current liabilities	793	619
Total assets	$ 4,013	$ 4,569