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Intangibles, Net (Details) - USD ($) $ in Thousands | 12 Months Ended
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Jul. 31, 2021 | Jul. 31, 2020
Amortized intangible assets: |  |
Gross Carrying Amount | $ 75,278 | $ 81,865
Accumulated Amortization | (29,405) | (34,093)
Intangibles, net | 45,873 | 47,772
Supply contracts and customer relationships |  |
Amortized intangible assets: |  |
Gross Carrying Amount | 55,598 | 50,600
Accumulated Amortization | (21,739) | (16,780)
Intangibles, net | $ 33,859 | $ 33,820
Useful life of intangible assets | 7 years | 8 years
Trade names |  |
Amortized intangible assets: |  |
Gross Carrying Amount | $ 18,944 | $ 23,635
Accumulated Amortization | (7,163) | (10,075)
Intangibles, net | $ 11,781 | $ 13,560
Useful life of intangible assets | 6 years | 6 years
Licenses and databases |  |
Amortized intangible assets: |  |
Gross Carrying Amount | $ 736 | $ 7,630
Accumulated Amortization | (503) | (7,238)
Intangibles, net | $ 233 | $ 392
Useful life of intangible assets | 2 years | 3 years

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