Investment in Affiliates (Tables)

6 Months Ended

Jul. 31, 2016

Equity Method Investments And Joint Ventures [Abstract]

Summary of Affiliates and Percentages Owned

A summary of material, jointly-owned affiliates, as well as their primary operating subsidiaries, if applicable, and the percentages directly and indirectly owned by us are as follows as of July 31, 2016:

	Percentage Owned Directly			Percentage Owned Indirectly
Boyles Bros Servicios Tecnicos Geologicos S. A. (Panama)		50.00	%
Boytec, S.A. (Panama)					50.00	%
Boytec Sondajes de Mexico, S.A. de C.V. (Mexico)					50.00
Sondajes Colombia, S.A. (Columbia)					50.00
Mining Drilling Fluids (Panama)					25.00
Plantel Industrial S.A. (Chile)					50.00
Christensen Chile, S.A. (Chile)		50.00
Christensen Commercial, S.A. (Chile)		50.00
Geotec Boyles Bros., S.A. (Chile)		50.00
Centro Internacional de Formacion S.A. (Chile)					50.00
Geoestrella S.A. (Chile)					25.00
Diamantina Christensen Trading (Panama)		42.69
Christensen Commercial, S.A. (Peru)		35.38
Geotec, S.A. (Peru)		35.38
Boyles Bros., Diamantina, S.A. (Peru)		29.49

Summary of Financial Information of Affiliates

Financial information of the affiliates is reported with a one-month lag in the reporting period. The impacts of the lag on our investment and results of operations are not significant. Summarized financial information of the affiliates was as follows:

	Three Months					Six Months
	Ended July 31,					Ended July 31,
(in thousands)	2016		2015			2016		2015
Income statement data:
Revenues	$	30,018	$	33,813		$	59,907	$	70,136
Gross profit		5,596		4,349			11,533		9,663
Operating income		1,900		690			4,278		1,869
Net income (loss)		1,004		(2,854	)		3,527		(3,090	)