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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jul. 31, 2019 | Jan. 31, 2019
Statement of Financial Position [Abstract] |  |
Accounts receivable from related parties | $ 68,000 | $ 79,000
Allowance for doubtful accounts receivable | $ 3,000 | $ 3,000
Shares of beneficial interest, without par value |  |
Shares of beneficial interest, authorized shares | Unlimited | Unlimited
Shares of beneficial interest, shares issued | 18,877,960 | 18,859,960
Shares of beneficial interest, shares outstanding | 9,318,934 | 9,366,076
Treasury stock, shares held | 9,289,026 | 9,223,884

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