Discontinued Operations (Tables)

3 Months Ended

Oct. 31, 2013

Discontinued Operations [Abstract]

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

	Three Months Ended October 31,
	2013		2012
	(in thousands)
Revenues	$	—	$	468
Loss before income taxes	$	—	$	(1,452	)
Net loss	$	—	$	(1,452	)

Schedule of Changes in Company's Estimated Liability

	Three Months Ended October 31, 2013
	(in thousands)
Balance, beginning of period	$	931
Additional liability		1,624
Payments		(55	)
Balance, end of period	$	2,500