(Tables)

3 Months Ended

Apr. 30, 2013

Business segment reporting [Abstract]

Business segment reporting [Table Text Block]

	Three Months Ended April 30,
	2013			2012
Net sales
Piping Systems		$36,058			$19,744
Filtration Products	18,633			22,976
Corporate and Other	3,053			1,779
Total		$57,744			$44,499
Gross profit
Piping Systems		$10,444			$3,398
Filtration Products	2,275			3,112
Corporate and Other	413			322
Total		$13,132			$6,832
Income (loss) from operations
Piping Systems		$5,380			$155
Filtration Products	(483		)	196
Corporate and Other	(2,092		)	(2,648		)
Total		$2,805			($2,297	)
Income (loss) continuing operations before income taxes
Piping Systems		$5,084			($91	)
Filtration Products	(483		)	196
Corporate and Other	(2,581		)	(3,019		)
Total		$2,020			($2,914	)