Discontinued Operations (Tables)

6 Months Ended

Jan. 31, 2014

Discontinued Operations [Abstract]

Schedule of Changes in Company's Estimated Liability

	Six Months Ended January 31, 2014
	(in thousands)
Balance, beginning of period	$	931
Additional liability		1,700
Payments		(262	)
Balance, end of period	$	2,369

Shedule of Revenues, Loss before Income Taxes and Net Loss of Straight Path in Discontinued Operations

	Three Months Ended January 31,					Six Months Ended January 31,
	2014		2013			2014		2013
	(in thousands)
Revenues	$	—	$	229		$	—	$	697
Loss before income taxes	$	—	$	(401	)	$	—	$	(1,853	)
Net loss	$	—	$	(413	)	$	—	$	(1,865	)