Property, Buildings and Equipment, net (Tables)

12 Months Ended

Jul. 31, 2017

Property, Buildings and Equipment, net [Abstract]

Property, Buildings and Equipment, net

Property, buildings and equipment is summarized in the following table.

	Balance at July 31,
	2017			2016
	(in thousands)
Land and land improvements	$	393		$	393
Buildings and building improvements		7,338			9,700
Field equipment		2,267			2,222
Computer equipment		4,339			4,439
Computer software		3,107			3,105
Office furniture and equipment		2,264			2,683
Vehicles		1,331			1,333
Other		383			543
		21,422			24,418
Accumulated depreciation and amortization		(16,994	)		(18,324	)
Property, buildings and equipment, net	$	4,428		$	6,094