Income Taxes (Provision for Income Taxes Differed from Amounts Computed by the U.S. Federal Income Tax Rate) (Details) - USD ($)	12 Months Ended
	Jul. 31, 2025	Jul. 31, 2024	Jul. 31, 2023
Amount
Computed "expected" tax benefit	$ (32,630,000)	$ (21,059,000)	$ (6,478,000)
State and local income taxes, net of valuation allowance and federal benefit	406,000	(127,000)	440,000
Stock-based compensation	1,017,000	1,891,000	692,000
Research and experimentation credits	(1,125,000)	(1,251,000)	(2,576,000)
Foreign-derived intangible income deduction	0	43,000	(517,000)
Revaluation of warrants and embedded derivatives	(8,085,000)	(897,000)	0
Nondeductible executive compensation	102,000	0	1,484,000
PST Divestiture	0	1,384,000	0
Change in U.S. federal and foreign valuation allowances	24,929,000	10,177,000	2,834,000
Foreign income tax rate differential	(804,000)	(389,000)	(269,000)
Goodwill impairment	15,975,000	9,549,000	0
Other, net	135,000	384,000	442,000
Benefit from income taxes	$ (80,000)	$ (295,000)	$ (3,948,000)
Rate
Computed "expected" tax benefit	21.00%	21.00%	21.00%
State and local income taxes, net of valuation allowance and federal benefit	(0.20%)	0.10%	(1.40%)
Stock-based compensation	(0.60%)	(1.90%)	(2.20%)
Research and experimentation credits	0.70%	1.20%	8.40%
Foreign-derived intangible income deduction	0.00%	0.00%	1.70%
Revaluation of warrants and embedded derivatives	5.20%	0.90%	0.00%
Nondeductible executive compensation	(0.10%)	0.00%	(4.80%)
PST Divestiture	0.00%	(1.40%)	0.00%
Change in U.S. federal and foreign valuation allowances	(16.00%)	(10.00%)	(9.20%)
Foreign income tax rate differential	0.50%	0.40%	0.90%
Goodwill impairment	(10.30%)	(9.50%)	0.00%
Other, net	(0.10%)	(0.50%)	(1.60%)
Benefit from income taxes	0.10%	0.30%	12.80%