Note 14 - Stockholders' Equity (Details Textual)
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3 Months Ended |
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Jun. 06, 2019
USD ($)
$ / shares
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May 14, 2019
USD ($)
$ / shares
shares
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Apr. 29, 2019
USD ($)
shares
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Apr. 01, 2019 |
Dec. 06, 2018
$ / shares
shares
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Jan. 31, 2022
USD ($)
$ / shares
shares
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Jan. 31, 2021
USD ($)
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Oct. 31, 2021
$ / shares
shares
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| Common Stock, Shares Authorized (in shares) |
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500,000,000
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500,000,000
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500,000,000
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| Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares |
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$ 0.0001
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$ 0.0001
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$ 0.0001
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| Preferred Stock, Shares Authorized (in shares) |
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10,000,000
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| Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares |
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$ 0.0001
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| Common Stock, Shares, Issued, Total (in shares) |
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28,847,707
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56,700,148
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56,564,642
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| Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) |
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34,100,000
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| Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares) |
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1
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| Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares |
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$ 11.50
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$ 11.50
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| Preferred Stock, Shares Outstanding, Ending Balance (in shares) |
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2,450,980
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| Convertible Preferred Stock, Redemption, Principal Investment | $ |
$ 25,000,000
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| Convertible Preferred Stock, Additional Cumulative Amount, Accrue Annual Rate |
7.00%
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| Convertible Preferred Stock, Additional Cumulative Amount | $ |
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$ 5,700,000
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| Convertible Preferred Stock, Convertible, Stock Price Trigger (in dollars per share) | $ / shares |
$ 13.00
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| Debt Instrument, Consecutive Period (Day) |
30 days
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| Par Value of Warrant in APIC | $ |
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$ 26,300,000
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| Public Offering [Member] |
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| Stock Issued During Period, Shares, New Issues (in shares) |
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18,098,166
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| Shares Issued, Price Per Share (in dollars per share) | $ / shares |
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$ 4.50
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| Proceeds from Issuance of Common Stock | $ |
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$ 77,400,000
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| Public Offering [Member] | Directors, Officers, Stockholders [Member] |
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| Stock Issued During Period, Shares, New Issues (in shares) |
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3,980,166
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| Shares Issued, Price Per Share (in dollars per share) | $ / shares |
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$ 4.50
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| Percentage of Shares Issued |
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25.00%
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| Public Warrants [Member] |
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| Number of Shares Issued in Exchange for Warrants (in shares) |
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2,101,213
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| Class of Warrant or Right, Outstanding (in shares) |
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13,017,677
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13,017,677
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| Warrant Exchange for Common Stock, Exchange Ratio |
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0.2105
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| Class of Warrant or Right, Exchanged During Period (in shares) |
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9,982,123
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| Private Warrants [Member] |
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| Number of Shares Issued in Exchange for Warrants (in shares) |
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1,707,175
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| Class of Warrant or Right, Outstanding (in shares) |
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0
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0
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| Warrant Exchange for Common Stock, Exchange Ratio |
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0.1538
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| Class of Warrant or Right, Exchanged During Period (in shares) |
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11,100,000
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| Series A Preferred Stock [Member] |
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| Preferred Stock, Dividend Rate, Percentage |
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0.00%
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| Dividends, Preferred Stock, Total | $ |
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$ 0
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| Preferred Stock, Convertible, Conversion Ratio |
1
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