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Consolidated Balance Sheets (Parenthetical) - $ / shares	Jan. 31, 2021	Apr. 30, 2020
Preferred stock, shares authorized	6,500,000	6,500,000
Preferred stock, shares issued	2,885,586	3,890,327
Preferred stock, shares outstanding	2,885,586	3,890,327
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	27,160,926	20,011,091
Common stock, shares outstanding	27,160,926	20,011,091
Series A Preferred Stock
Preferred stock, shares authorized	2,200,000	2,200,000
Preferred stock, shares issued	158,704	208,704
Preferred stock, shares outstanding	158,704	208,704
Series B Preferred Stock
Preferred stock, shares authorized	4,300,000	4,300,000
Preferred stock, shares issued	2,726,882	3,681,623
Preferred stock, shares outstanding	2,726,882	3,681,623

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Face amount or stated value per share of common stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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