SEGMENT REPORTING (Details) $ in Thousands	3 Months Ended
	Apr. 30, 2023 USD ($) segment	Apr. 30, 2022 USD ($)	Jan. 31, 2023 USD ($)
Segment Reporting Information
Operating segment | segment	1
Revenues	$ 103,675	$ 100,277
Cost of revenues	89,451	80,539
Gross profit	14,224	19,738
Selling, general and administrative expenses	10,591	10,575
Income (loss) from operations	3,633	9,163
Other income (loss), net	(629)	595
Income (loss) before income taxes	3,004	9,758
Income tax expense	895	2,273
Net income	2,109	7,485
Amortization of intangibles	98	166
Depreciation	547	809
Property, plant and equipment additions	645	238
Current assets	425,001	447,591	$ 438,702
Current liabilities	192,397	186,274	202,503
Goodwill	28,033	28,033	28,033
Total assets	475,694	492,810	$ 489,487
Other [Member]
Segment Reporting Information
Selling, general and administrative expenses	2,714	2,436
Income (loss) from operations	(2,714)	(2,436)
Other income (loss), net	(2,719)	9
Income (loss) before income taxes	(5,433)	(2,427)
Depreciation	1	1
Current assets	73,474	86,375
Current liabilities	1,435	1,543
Total assets	76,466	86,616
Power Industry Services [Member]
Segment Reporting Information
Revenues	70,176	73,949
Cost of revenues	60,335	59,035
Gross profit	9,841	14,914
Selling, general and administrative expenses	5,714	5,615
Income (loss) from operations	4,127	9,299
Other income (loss), net	2,090	584
Income (loss) before income taxes	6,217	9,883
Depreciation	128	142
Property, plant and equipment additions	389	52
Current assets	303,596	329,779
Current liabilities	160,564	170,684
Goodwill	18,476	18,476
Total assets	330,736	353,570
Industrial Services
Segment Reporting Information
Revenues	30,307	22,501
Cost of revenues	26,562	18,680
Gross profit	3,745	3,821
Selling, general and administrative expenses	1,460	1,759
Income (loss) from operations	2,285	2,062
Income (loss) before income taxes	2,285	2,062
Amortization of intangibles	98	166
Depreciation	304	544
Property, plant and equipment additions	256	151
Current assets	43,946	27,872
Current liabilities	29,226	12,362
Goodwill	9,467	9,467
Total assets	61,421	45,379
Telecommunications Infrastructure Services [Member]
Segment Reporting Information
Revenues	3,192	3,827
Cost of revenues	2,554	2,824
Gross profit	638	1,003
Selling, general and administrative expenses	703	765
Income (loss) from operations	(65)	238
Other income (loss), net		2
Income (loss) before income taxes	(65)	240
Depreciation	114	122
Property, plant and equipment additions		35
Current assets	3,985	3,565
Current liabilities	1,172	1,685
Goodwill	90	90
Total assets	$ 7,071	$ 7,245