SEGMENT REPORTING (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Jan. 31, 2019
Segment Reporting Information
Revenues	$ 49,544	$ 141,366
Cost of revenues	70,570	125,914
Gross (loss) profit	(21,026)	15,452
Selling, general and administrative expenses	9,588	9,637
Impairment loss	2,072
(Loss) income from operations	(32,686)	5,815
Other income, net	2,252	764
(Loss) income loss before income taxes	(30,434)	6,579
Income tax benefit (expense)	521	(1,737)
Net (loss) income	(29,913)	4,842
Amortization of purchased intangible assets	299	253
Depreciation	829	771
Property, plant and equipment additions	1,985	3,691
Current assets	373,161	465,632	$ 416,348
Current liabilities	71,026	165,313	82,276
Goodwill	30,766	34,329	32,838
Total assets	433,161	525,878	$ 476,648
Power Services
Segment Reporting Information
Revenues	20,203	122,487
Cost of revenues	44,526	108,296
Gross (loss) profit	(24,323)	14,191
Selling, general and administrative expenses	5,646	5,232
Impairment loss	2,072
(Loss) income from operations	(32,041)	8,959
Other income, net	2,100	675
(Loss) income loss before income taxes	(29,941)	9,634
Amortization of purchased intangible assets	87	87
Depreciation	168	176
Property, plant and equipment additions	1,062	826
Current assets	281,759	365,569
Current liabilities	52,829	147,694
Goodwill	18,476	20,548
Total assets	310,354	393,932
Industrial Services
Segment Reporting Information
Revenues	27,069	16,449
Cost of revenues	24,271	15,649
Gross (loss) profit	2,798	800
Selling, general and administrative expenses	1,861	1,835
(Loss) income from operations	937	(1,035)
(Loss) income loss before income taxes	937	(1,035)
Amortization of purchased intangible assets	166	166
Depreciation	560	513
Property, plant and equipment additions	815	2,564
Current assets	33,315	23,598
Current liabilities	16,909	15,989
Goodwill	12,290	13,781
Total assets	61,893	53,698
Telecom Services
Segment Reporting Information
Revenues	2,272	2,430
Cost of revenues	1,773	1,969
Gross (loss) profit	499	461
Selling, general and administrative expenses	511	462
(Loss) income from operations	(12)	(1)
(Loss) income loss before income taxes	(12)	(1)
Amortization of purchased intangible assets	46
Depreciation	100	79
Property, plant and equipment additions	97	300
Current assets	2,893	3,380
Current liabilities	619	1,115
Total assets	4,569	4,862
Other
Segment Reporting Information
Selling, general and administrative expenses	1,570	2,108
(Loss) income from operations	(1,570)	(2,108)
Other income, net	152	89
(Loss) income loss before income taxes	(1,418)	(2,019)
Depreciation	1	3
Property, plant and equipment additions	11	1
Current assets	55,194	73,085
Current liabilities	669	515
Total assets	56,345	$ 73,386
Intercompany Eliminations
Segment Reporting Information
Revenues	$ 500