Investment in joint venture (Notes)

9 Months Ended

Oct. 31, 2014

Schedule of Equity Method Investments [Line Items]

Equity Method Investments and Joint Ventures Disclosure [Text Block]

Investment in joint venture. In October 2009, the Company invested $5.9 million, which consisted of $2 million for a 49% interest and $3.9 million for a note receivable, in a Canadian joint venture with The Bayou Companies, Inc., a subsidiary of Aegion Corporation. The joint venture operates in Camrose, Alberta, Canada, which provides the Company the opportunity to participate in the growing oil sands market.

The Company accounts for the investment in the joint venture using the equity method. The financial results are included in the Company's consolidated financial statements.

	Nine Months Ended October 31,
	2014	2013
Income from joint venture	1,114	248

The following information summarizes the joint venture financial data as of October 31, 2014 and January 31, 2014, respectively:

	October 31, 2014	January 31, 2014
Current assets	$14,451	$13,034
Noncurrent assets	16,085	17,093
Current liabilities	4,184	2,921
Noncurrent liabilities	11,923	14,837
Equity	14,429	12,369

	Nine Months Ended October 31,
	2014		2013
Revenue		$28,666		$19,913
Gross profit	5,426		3,157
Income from continuing operations	3,820		1,570
Net income	2,268		516