Business Segment Information (Tables)

12 Months Ended

Jul. 31, 2017

Business Segment Information [Abstract]

Summary of operating results for the business segments

	Straight			Straight			Straight
	Path			Path			Path
	Spectrum			IP Group			Ventures			Total
Year Ended July 31, 2017
Revenues	$	658		$	—		$	—		$	658
Loss from operations		(34,976	)		(6,098	)		(1,937	)		(43,011	)
Year Ended July 31, 2016
Revenues	$	461		$	1,695		$	—		$	2,156
Loss from operations		(5,508	)		(2,688	)		(891	)		(9,087	)
Year Ended July 31, 2015
Revenues	$	426		$	12,814		$	—		$	13,240
Income (loss) from operations		(1,641	)		1,907			—			266

Summary of total assets for the business segments

	Straight		Straight		Straight
	Path		Path		Path
	Spectrum		IP Group		Ventures		Total
	(in thousands)
Total assets
July 31, 2017	$	8,054	$	2,696	$	1,100	$	11,850
July 31, 2016		10,174		2,223		1,100		13,497