Property disposition (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 6 Months Ended | ||||
|---|---|---|---|---|---|---|
Feb. 08, 2019 |
Apr. 30, 2019 |
Apr. 30, 2018 |
Apr. 30, 2019 |
Apr. 30, 2018 |
Oct. 31, 2018 |
|
| Real Estate Properties [Line Items] | ||||||
| Agreed sales price of property held for sale | $ 7,060 | |||||
| Capital gain | $ 836 | 836 | ||||
| Special dividend paid | $ 848 | $ 337 | $ 848 | $ 337 | $ 338 | |
| Pathmark supermarket in Patchogue [Member] | ||||||
| Real Estate Properties [Line Items] | ||||||
| Agreed sales price of property held for sale | $ 7,500 | |||||
| Rental properties | 6,200 | |||||
| Capital gain | 800 | |||||
| Net cash proceeds from sale of property | 2,000 | |||||
| Mortgage payoff | 5,200 | |||||
| Special dividend paid | $ 676 | |||||
| Dividend per share | $ 0.10 | |||||
| Sale of property operating loss | $ 800 | |||||
| Price per share operating loss eliminated from sale of property | $ 0.12 | |||||