Segment Information (Reconciliation Of Adjusted EBITDA) (Details) - USD ($)	3 Months Ended				9 Months Ended
	May 31, 2020	Feb. 29, 2020	Nov. 30, 2019	May 31, 2019	May 31, 2020	May 31, 2019
Segment Reporting Information [Line Items]
Consolidated Adjusted EBITDA	$ (3,642,000)			$ 3,071,000	$ 5,375,000	$ 7,203,000
Stock-based compensation expense	5,104,000			(1,051,000)	1,460,000	(3,040,000)
Decrease (increase) in the fair value of contingent consideration liabilities	276,000	$ 182,000	$ (91,000)	(1,069,000)	367,000	(1,145,000)
Gain from insurance proceeds	933,000				933,000
Knowledge Capital wind-down costs					(389,000)
Licensee transition costs						(488,000)
Impaired assets	0
Depreciation	(1,652,000)			(1,556,000)	(4,925,000)	(4,806,000)
Amortization	(1,164,000)			(1,259,000)	(3,504,000)	(3,797,000)
Loss from operations	(145,000)			(1,864,000)	(683,000)	(6,073,000)
Interest income	18,000			8,000	36,000	30,000
Interest expense	(621,000)			(562,000)	(1,783,000)	(1,817,000)
Discount accretion on related party receivable						258,000
Loss before income taxes	(748,000)			(2,418,000)	(2,430,000)	(7,602,000)
Income tax benefit (provision)	(10,220,000)			394,000	(7,985,000)	704,000
Net loss	(10,968,000)			(2,024,000)	(10,415,000)	(6,898,000)
Operating Segments [Member]
Segment Reporting Information [Line Items]
Consolidated Adjusted EBITDA	(1,908,000)			5,620,000	9,785,000	13,475,000
Corporate And Eliminations [Member]
Segment Reporting Information [Line Items]
Consolidated Adjusted EBITDA	$ (1,734,000)			$ (2,549,000)	$ (4,410,000)	$ (6,272,000)