Note 13 - Related Party Transaction (Details Textual) - USD ($)		3 Months Ended	9 Months Ended		13 Months Ended
	Dec. 18, 2019	Oct. 31, 2021	Oct. 31, 2021	Oct. 31, 2020	Jan. 31, 2021	Sep. 30, 2020
Preferred Stock, Par or Stated Value Per Share (in dollars per share)		$ 1.00	$ 1.00		$ 1.00
Common Stock, Par or Stated Value Per Share (in dollars per share)		$ 0.01	$ 0.01		$ 0.01
Proceeds from Issuance of Preferred Stock and Preference Stock			$ 5,145,000	$ 0
Second ATM Offering Program [Member] | Common Stock [Member] | Non-executive Chairman [Member]
Payments of Stock Issuance Costs			$ 1,000
Ladenburg Thalmann and Co. Inc. [Member] | Second ATM Offering Program [Member] | Common Stock [Member]
Equity Offering, Maximum Shares to be Issued (in shares)						5,000,000
Stock Issued During Period, Shares, New Issues (in shares)			18,415
Common Stock, Par or Stated Value Per Share (in dollars per share)						$ 0.01
Proceeds from Issuance of Preferred Stock and Preference Stock			$ 43,000
Ladenburg Thalmann and Co. Inc. [Member] | Series A Preferred Stock [Member] | First ATM Offering Program [Member]
Equity Offering, Maximum Shares to be Issued (in shares)	500,000
Preferred Stock, Dividend Rate, Percentage	9.00%
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 1.00
Equity Offering, Distribution Compensation, Percentage of Gross Proceeds	2.00%
Stock Issued During Period, Shares, New Issues (in shares)					994,046
Equity Offering, Distribution Compensation, Percentage of Preferred Stock Issued	100.00%
Ladenburg Thalmann and Co. Inc. [Member] | Series A Preferred Stock [Member] | Second ATM Offering Program [Member]
Equity Offering, Maximum Shares to be Issued (in shares)						500,000
Stock Issued During Period, Shares, New Issues (in shares)		26,506	211,246
Proceeds from Issuance of Preferred Stock and Preference Stock		$ 642,000	$ 5,100,000
Payments of Stock Issuance Costs		$ 13,000	$ 105,000