Business segment reporting

3 Months Ended

Apr. 30, 2014

Segment reporting [Line Items]

Segment Reporting Disclosure [Text Block]

Business segment reporting. The Company has two reportable segments. Piping Systems engineers, designs, manufactures and sells specialty piping, leak detection and location systems. Filtration Products manufactures custom-designed industrial filtration products to remove particulates from air and other gas streams.

In the quarter ended April 30, 2014, one customer in Piping Systems accounted for 21% of the Company's net sales. In the quarter ended April 30, 2013, no customer accounted for 10% or more of the Company's net sales. At April 30, 2014, one customer in Piping Systems accounted for 42% of accounts receivable. At January 31, 2014, one customer in Piping Systems accounted for 24% of accounts receivable.

	Three Months Ended April 30,
	2014			2013
Net sales
Piping Systems		$42,354			$36,058
Filtration Products	17,170			18,633
Total		$59,524			$54,691
Gross profit
Piping Systems		$13,458			$10,444
Filtration Products	2,531			2,275
Total		$15,989			$12,719
Income (loss) from operations
Piping Systems		$8,017			$5,380
Filtration Products	(544		)	(483		)
Corporate	(1,764		)	(2,364		)
Total		$5,709			$2,533