Segment Information (Schedule of Revenue Disaggregated By Type Of Service) (Details) - USD ($)	3 Months Ended		9 Months Ended
	May 31, 2026	May 31, 2025	May 31, 2026	May 31, 2025
Disaggregation of Revenue [Line Items]
Revenue	$ 67,807,000	$ 67,121,000	$ 191,499,000	$ 195,819,000
Services And Products [Member]
Disaggregation of Revenue [Line Items]
Revenue	25,532,000	25,699,000	66,910,000	71,731,000
Contracted Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue	37,966,000	36,783,000	111,155,000	108,808,000
Royalties [Member]
Disaggregation of Revenue [Line Items]
Revenue	3,874,000	3,722,000	12,593,000	12,675,000
Leases And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	435,000	917,000	841,000	2,605,000
Operating Segments [Member] \| North America Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	38,024,000	37,054,000	106,763,000	111,711,000
Operating Segments [Member] \| International [Member]
Disaggregation of Revenue [Line Items]
Revenue	10,052,000	10,212,000	30,410,000	30,685,000
Operating Segments [Member] \| Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue	18,998,000	18,640,000	52,590,000	50,169,000
Operating Segments [Member] \| Corporate and Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue	733,000	1,215,000	1,736,000	3,254,000
Operating Segments [Member] \| Services And Products [Member] \| North America Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	15,383	14,139	39,831	42,358
Operating Segments [Member] \| Services And Products [Member] \| International [Member]
Disaggregation of Revenue [Line Items]
Revenue	4,981	5,346	14,641	14,807
Operating Segments [Member] \| Services And Products [Member] \| Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue	5,168	6,214	12,438	14,566
Operating Segments [Member] \| Services And Products [Member] \| Corporate and Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Operating Segments [Member] \| Contracted Revenue [Member] \| North America Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	22,040	22,534	65,852	68,353
Operating Segments [Member] \| Contracted Revenue [Member] \| International [Member]
Disaggregation of Revenue [Line Items]
Revenue	2,872	2,475	8,455	8,121
Operating Segments [Member] \| Contracted Revenue [Member] \| Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue	13,054	11,774	36,848	32,334
Operating Segments [Member] \| Contracted Revenue [Member] \| Corporate and Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Operating Segments [Member] \| Royalties [Member] \| North America Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	601	381	1,080	1,000
Operating Segments [Member] \| Royalties [Member] \| International [Member]
Disaggregation of Revenue [Line Items]
Revenue	2,199	2,391	7,314	7,757
Operating Segments [Member] \| Royalties [Member] \| Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue	776	652	3,304	3,269
Operating Segments [Member] \| Royalties [Member] \| Corporate and Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue	298	298	895	649
Operating Segments [Member] \| Leases And Other [Member] \| North America Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Operating Segments [Member] \| Leases And Other [Member] \| International [Member]
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Operating Segments [Member] \| Leases And Other [Member] \| Education Practice [Member]
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Operating Segments [Member] \| Leases And Other [Member] \| Corporate and Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue	435	917	841	2,605
Enterprise Division [Member] \| Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Revenue	48,076,000	47,266,000	137,173,000	142,396,000
Enterprise Division [Member] \| Operating Segments [Member] \| Services And Products [Member]
Disaggregation of Revenue [Line Items]
Revenue	20,364,000	19,485,000	54,472,000	57,165,000
Enterprise Division [Member] \| Operating Segments [Member] \| Contracted Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue	24,912,000	25,009,000	74,307,000	76,474,000
Enterprise Division [Member] \| Operating Segments [Member] \| Royalties [Member]
Disaggregation of Revenue [Line Items]
Revenue	2,800,000	2,772,000	8,394,000	8,757,000
Enterprise Division [Member] \| Operating Segments [Member] \| Leases And Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 0	$ 0	$ 0	$ 0