COVID-19 Pandemic (Details) - USD ($)	3 Months Ended	6 Months Ended		12 Months Ended
	Jan. 31, 2021	Apr. 30, 2021	Apr. 30, 2020	Oct. 31, 2020
Aggregate lease termination fee	$ 260,000
Loss of base rent and additional rent		$ 400,000
Rental revenue deemed uncollectible	300,000	900,000
Security deposit as accounts receivables		1,395,000	$ 1,604,000
Rent abatements	51,000	101,000
Deferred payments of loan		1,013,000
Repayments of Loan		162,000		$ 162,000
Positive cash flow from operations		8,735,000	$ 419,000
Cash balance		38,600,000
Available line of credit		13,000,000
FREIT [Member]
Aggregate lease termination fee	140,000
Loss of base rent and additional rent		200,000
Rental revenue deemed uncollectible	200,000	600,000
Rent abatements	$ 40,000	$ 71,000
Commercial Properties [Member]
Average annual occupancy rate		76.60%	81.00%
Security deposit as accounts receivables		$ 402,000