SEGMENT REPORTING (Details) $ in Thousands	3 Months Ended
	Apr. 30, 2024 USD ($) segment	Apr. 30, 2023 USD ($)	Jan. 31, 2024 USD ($)
Segment Reporting Information
Operating segment | segment	1
Revenues	$ 157,682	$ 103,675
Cost of revenues	139,738	89,451
Gross profit	17,944	14,224
Selling, general and administrative expenses	11,425	10,591
Income (loss) from operations	6,519	3,633
Other income (loss), net	4,794	(629)
Income (loss) before income taxes	11,313	3,004
Income tax expense	3,431	895
Net income	7,882	2,109
Amortization of intangibles	97	98
Depreciation	480	547
Property, plant and equipment additions	322	645
Current assets	574,326	425,001	$ 547,179
Current liabilities	327,598	192,397	302,260
Goodwill	28,033	28,033	28,033
Total assets	624,408	475,694	$ 598,229
Corporate, Non-Segment [Member]
Segment Reporting Information
Selling, general and administrative expenses	2,814	2,714
Income (loss) from operations	(2,814)	(2,714)
Other income (loss), net	732	(2,719)
Income (loss) before income taxes	(2,082)	(5,433)
Depreciation	1	1
Current assets	100,195	73,474
Current liabilities	2,605	1,435
Total assets	103,180	76,466
Power Industry Services | Operating Segments
Segment Reporting Information
Revenues	110,266	70,176
Cost of revenues	98,992	60,335
Gross profit	11,274	9,841
Selling, general and administrative expenses	6,128	5,714
Income (loss) from operations	5,146	4,127
Other income (loss), net	4,061	2,090
Income (loss) before income taxes	9,207	6,217
Depreciation	137	128
Property, plant and equipment additions	272	389
Current assets	416,117	303,596
Current liabilities	293,979	160,564
Goodwill	18,476	18,476
Total assets	443,920	330,736
Industrial Construction Services | Operating Segments
Segment Reporting Information
Revenues	43,699	30,307
Cost of revenues	37,879	26,562
Gross profit	5,820	3,745
Selling, general and administrative expenses	1,873	1,460
Income (loss) from operations	3,947	2,285
Other income (loss), net	1
Income (loss) before income taxes	3,948	2,285
Amortization of intangibles	97	98
Depreciation	245	304
Property, plant and equipment additions	32	256
Current assets	54,170	43,946
Current liabilities	29,642	29,226
Goodwill	9,467	9,467
Total assets	70,792	61,421
Telecommunications Infrastructure Services | Operating Segments
Segment Reporting Information
Revenues	3,717	3,192
Cost of revenues	2,867	2,554
Gross profit	850	638
Selling, general and administrative expenses	610	703
Income (loss) from operations	240	(65)
Income (loss) before income taxes	240	(65)
Depreciation	97	114
Property, plant and equipment additions	18
Current assets	3,844	3,985
Current liabilities	1,372	1,172
Goodwill	90	90
Total assets	$ 6,516	$ 7,071