SEGMENT REPORTING (Details) $ in Thousands	3 Months Ended
	Apr. 30, 2022 USD ($) segment	Apr. 30, 2021 USD ($)	Jan. 31, 2022 USD ($)
Segment Reporting Information
Operating segment | segment	1
Revenues	$ 100,277	$ 126,341
Cost of revenues	80,539	102,627
Gross profit	19,738	23,714
Selling, general and administrative expenses	10,575	9,892
Income (loss) from operations	9,163	13,822
Other (loss) income, net	595	712
Income (loss) before income taxes	9,758	14,534
Income tax expense	(2,273)	(3,768)
Net income	7,485	10,766
Amortization of intangibles	166	228
Depreciation	809	882
Property, plant and equipment additions	238	844
Current assets	447,591	559,031	$ 507,284
Current liabilities	186,274	283,065	223,027
Goodwill	28,033	27,943	28,033
Total assets	492,810	617,972	$ 553,585
Other [Member]
Segment Reporting Information
Selling, general and administrative expenses	2,436	2,069
Income (loss) from operations	(2,436)	(2,069)
Other (loss) income, net	9	2
Income (loss) before income taxes	(2,427)	(2,067)
Depreciation	1	1
Property, plant and equipment additions		1
Current assets	86,375	157,349
Current liabilities	1,543	1,586
Total assets	86,616	157,716
Intercompany Eliminations
Segment Reporting Information
Revenues		2,000
Power Industry Services [Member]
Segment Reporting Information
Revenues	73,949	97,172
Cost of revenues	59,035	78,669
Gross profit	14,914	18,503
Selling, general and administrative expenses	5,615	5,455
Income (loss) from operations	9,299	13,048
Other (loss) income, net	584	710
Income (loss) before income taxes	9,883	13,758
Amortization of intangibles		61
Depreciation	142	166
Property, plant and equipment additions	52	602
Current assets	329,779	371,827
Current liabilities	170,684	265,471
Goodwill	18,476	18,476
Total assets	353,570	408,442
Industrial Services
Segment Reporting Information
Revenues	22,501	26,658
Cost of revenues	18,680	21,969
Gross profit	3,821	4,689
Selling, general and administrative expenses	1,759	1,882
Income (loss) from operations	2,062	2,807
Income (loss) before income taxes	2,062	2,807
Amortization of intangibles	166	167
Depreciation	544	607
Property, plant and equipment additions	151	9
Current assets	27,872	27,422
Current liabilities	12,362	14,796
Goodwill	9,467	9,467
Total assets	45,379	47,840
Telecommunications Infrastructure Services [Member]
Segment Reporting Information
Revenues	3,827	2,511
Cost of revenues	2,824	1,989
Gross profit	1,003	522
Selling, general and administrative expenses	765	486
Income (loss) from operations	238	36
Other (loss) income, net	2
Income (loss) before income taxes	240	36
Depreciation	122	108
Property, plant and equipment additions	35	232
Current assets	3,565	2,433
Current liabilities	1,685	1,212
Goodwill	90
Total assets	$ 7,245	$ 3,974