Condensed Consolidated Statements of Operations (Unaudited) (USD $)	3 Months Ended		9 Months Ended
	Oct. 31, 2011	Oct. 31, 2010	Oct. 31, 2011	Oct. 31, 2010
Net revenues
Net revenues	$ 43,597,000	$ 45,229,000	$ 85,932,000	$ 150,783,000
Cost of revenues
Cost of revenues	37,130,000	37,849,000	70,920,000	127,849,000
Gross profit	6,467,000	7,380,000	15,012,000	22,934,000
Selling, general and administrative expenses	2,735,000	3,121,000	7,868,000	8,759,000
Income from operations	3,732,000	4,259,000	7,144,000	14,175,000
Interest expense		(7,000)		(32,000)
Investment income	33,000	29,000	84,000	61,000
Income from continuing operations before income taxes	3,765,000	4,281,000	7,228,000	14,204,000
Income tax expense	1,460,000	1,821,000	2,658,000	5,432,000
Income from continuing operations	2,305,000	2,460,000	4,570,000	8,772,000
Discontinued operations
Income (loss) on discontinued operations (including gains on disposal of $58,000 and $1,286,000 for the three and nine months ended October 31, 2011, respectively, see Note 3)	(365,000)	(1,433,000)	444,000	(2,922,000)
Income tax benefit (expense)	72,000	508,000	(326,000)	1,009,000
Income (loss) on discontinued operations	(293,000)	(925,000)	118,000	(1,913,000)
Net income	2,012,000	1,535,000	4,688,000	6,859,000
Continuing operations
Basic	$ 0.17	$ 0.18	$ 0.34	$ 0.65
Diluted	$ 0.17	$ 0.18	$ 0.33	$ 0.64
Discontinued operations
Basic	$ (0.02)	$ (0.07)	$ 0.01	$ (0.14)
Diluted	$ (0.02)	$ (0.07)	$ 0.01	$ (0.14)
Net income
Basic	$ 0.15	$ 0.11	$ 0.34	$ 0.50
Diluted	$ 0.15	$ 0.11	$ 0.34	$ 0.50
Weighted average number of shares outstanding:
Basic	13,609,000	13,596,000	13,605,000	13,591,000
Diluted	13,744,000	13,669,000	13,715,000	13,714,000
Cash dividend declared per common share	$ 0.50		$ 0.50
Telecommunications Infrastructure Services
Net revenues
Net revenues	2,328,000	2,523,000	6,254,000	6,308,000
Cost of revenues
Cost of revenues	1,882,000	1,850,000	5,113,000	5,281,000
Power Industry Services
Net revenues
Net revenues	41,269,000	42,706,000	79,678,000	144,475,000
Cost of revenues
Cost of revenues	$ 35,248,000	$ 35,999,000	$ 65,807,000	$ 122,568,000