Segment Reporting (Tables)

12 Months Ended

Jan. 31, 2013

Segment Reporting [Abstract]

Summarized operating results and certain financial position data of Company's reportable continuing business segments

	Power Industry Services			Telecom Infrastructure Services		Other			Consolidated
Net revenues	$	261,327,000		$	17,308,000	$	—		$	278,635,000
Cost of revenues		214,817,000			13,683,000		—			228,500,000
Gross profit		46,510,000			3,625,000		—			50,135,000
Selling, general and administrative expenses		7,950,000			1,628,000		4,772,000			14,350,000
		38,560,000			1,997,000		(4,772,000	)		35,785,000
Other (expense) income, net		(45,000	)		—		2,000			(43,000	)
Income (loss) from continuing operations before income taxes	$	38,515,000		$	1,997,000	$	(4,770,000	)		35,742,000
Income tax expense										13,640,000
Income from continuing operations									$	22,102,000
Amortization of purchased intangible assets	$	243,000		$	—	$	—		$	243,000
Depreciation	$	290,000		$	229,000	$	3,000		$	522,000
Fixed asset additions	$	6,986,000		$	277,000	$	—		$	7,263,000
Goodwill	$	18,476,000		$	—	$	—		$	18,476,000
Total assets	$	186,284,000		$	4,032,000	$	44,408,000		$	234,724,000

Fiscal Year Ended January 31, 2012

	Power Industry Services		Telecom Infrastructure Services		Other			Consolidated
Net revenues	$	132,519,000	$	9,331,000	$	—		$	141,850,000
Cost of revenues		111,193,000		7,555,000		—			118,748,000
Gross profit		21,326,000		1,776,000		—			23,102,000
Selling, general and administrative expenses		6,235,000		1,586,000		3,365,000			11,186,000
		15,091,000		190,000		(3,365,000	)		11,916,000
Other income, net		33,000		—		15,000			48,000
Income (loss) from continuing operations before income taxes	$	15,124,000	$	190,000	$	(3,350,000	)		11,964,000
Income tax expense									4,556,000
Income from continuing operations								$	7,408,000
Amortization of purchased intangible assets	$	334,000	$	—	$	—		$	334,000
Depreciation	$	207,000	$	244,000	$	4,000		$	455,000
Fixed asset additions	$	1,598,000	$	136,000	$	4,000		$	1,738,000
Goodwill	$	18,476,000	$	—	$	—		$	18,476,000
Total assets	$	164,049,000	$	3,121,000	$	38,082,000		$	205,252,000