Condensed Consolidated Statements of Operations (Unaudited) (USD $)	3 Months Ended		6 Months Ended
	Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2011	Jul. 31, 2010
Net revenues
Net revenues	$ 26,342,000	$ 52,320,000	$ 42,335,000	$ 105,554,000
Cost of revenues
Cost of revenues	21,695,000	43,540,000	33,790,000	90,000,000
Gross profit	4,647,000	8,780,000	8,545,000	15,554,000
Selling, general and administrative expenses	2,374,000	2,604,000	5,133,000	5,638,000
Income from operations	2,273,000	6,176,000	3,412,000	9,916,000
Interest expense		(11,000)		(25,000)
Investment income	29,000	20,000	51,000	32,000
Income from continuing operations before income taxes	2,302,000	6,185,000	3,463,000	9,923,000
Income tax expense	782,000	2,228,000	1,198,000	3,611,000
Income from continuing operations	1,520,000	3,957,000	2,265,000	6,312,000
Discontinued operations
Income (loss) on discontinued operations (including gains on disposal of $1,076,000 and $1,228,000 for the three and six months ended July 31, 2011)	874,000	(963,000)	809,000	(1,489,000)
Income tax (expense) benefit	(324,000)	307,000	(398,000)	501,000
Income (loss) on discontinued operations	550,000	(656,000)	411,000	(988,000)
Net income	2,070,000	3,301,000	2,676,000	5,324,000
Continuing operations
Basic	$ 0.11	$ 0.29	$ 0.17	$ 0.46
Diluted	$ 0.11	$ 0.29	$ 0.17	$ 0.46
Discontinued operations
Basic	$ 0.04	$ (0.05)	$ 0.03	$ (0.07)
Diluted	$ 0.04	$ (0.05)	$ 0.03	$ (0.07)
Net income
Basic	$ 0.15	$ 0.24	$ 0.20	$ 0.39
Diluted	$ 0.15	$ 0.24	$ 0.20	$ 0.39
Weighted average number of shares outstanding:
Basic	13,603,000	13,593,000	13,602,000	13,589,000
Diluted	13,717,000	13,699,000	13,699,000	13,736,000
Telecommunications Infrastructure Services
Net revenues
Net revenues	1,952,000	1,947,000	3,926,000	3,785,000
Cost of revenues
Cost of revenues	1,617,000	1,638,000	3,231,000	3,431,000
Power Industry Services
Net revenues
Net revenues	24,390,000	50,373,000	38,409,000	101,769,000
Cost of revenues
Cost of revenues	$ 20,078,000	$ 41,902,000	$ 30,559,000	$ 86,569,000