SEGMENT REPORTING (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2025	Apr. 30, 2024	Jan. 31, 2025
Segment Reporting Information
Revenues	$ 193,660	$ 157,682
Cost of revenues	156,797	139,738
Gross profit	36,863	17,944
Selling, general and administrative expenses	12,521	11,425
Income (loss) from operations	24,342	6,519
Other income, net	5,444	4,794
Income (loss) before income taxes	29,786	11,313
Income tax expense	7,236	3,431
Net income	22,550	7,882
Amortization of intangibles	98	97
Depreciation	415	480
Property, plant and equipment additions	395	322
Current assets	738,077	574,326	$ 781,300
Current liabilities	422,950	327,598	479,857
Goodwill	28,033	28,033	28,033
Total assets	792,155	624,408	836,227
Intercompany Eliminations
Segment Reporting Information
Revenues	1,900
Other
Segment Reporting Information
Selling, general and administrative expenses	3,205	2,814
Income (loss) from operations	(3,205)	(2,814)
Other income, net	1,040	732
Income (loss) before income taxes	(2,165)	(2,082)
Depreciation	3	1
Property, plant and equipment additions	80
Current assets	145,981	100,195
Current liabilities	1,283	2,605
Total assets	146,796	103,180
Power Services
Segment Reporting Information
Goodwill	18,500		18,500
Power Services | Operating Segments
Segment Reporting Information
Revenues	160,356	110,266
Cost of revenues	127,386	98,992
Gross profit	32,970	11,274
Selling, general and administrative expenses	6,786	6,128
Income (loss) from operations	26,184	5,146
Other income, net	4,372	4,061
Income (loss) before income taxes	30,556	9,207
Depreciation	160	137
Property, plant and equipment additions	215	272
Current assets	542,993	416,117
Current liabilities	398,610	293,979
Goodwill	18,476	18,476
Total assets	577,692	443,920
Industrial Construction Services | Operating Segments
Segment Reporting Information
Revenues	29,184	43,699
Cost of revenues	26,033	37,879
Gross profit	3,151	5,820
Selling, general and administrative expenses	1,612	1,873
Income (loss) from operations	1,539	3,947
Other income, net		1
Income (loss) before income taxes	1,539	3,948
Amortization of intangibles	98	97
Depreciation	160	245
Property, plant and equipment additions	12	32
Current assets	43,147	54,170
Current liabilities	19,095	29,642
Goodwill	9,467	9,467
Total assets	58,995	70,792
Telecom Services | Operating Segments
Segment Reporting Information
Revenues	4,120	3,717
Cost of revenues	3,378	2,867
Gross profit	742	850
Selling, general and administrative expenses	918	610
Income (loss) from operations	(176)	240
Other income, net	32
Income (loss) before income taxes	(144)	240
Depreciation	92	97
Property, plant and equipment additions	88	18
Current assets	5,956	3,844
Current liabilities	3,962	1,372
Goodwill	90	90
Total assets	8,672	$ 6,516
Industrial construction services
Segment Reporting Information
Goodwill	$ 9,500		$ 9,500