Note 7 - Restricted Cash - Cash, Cash Equivalents and Restricted Cash (Details) - USD ($)	Apr. 30, 2021	Jul. 31, 2020	Apr. 30, 2020	Jul. 31, 2019
Cash and cash equivalents	$ 43,930,316	$ 5,147,703	$ 7,407,189
Restricted cash	2,037,677	$ 1,839,216	1,839,119	$ 1,821,392
Total cash, cash equivalents and restricted cash	$ 45,967,993		$ 9,246,308

Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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