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Income Taxes (Details) - Schedule of Deferred Tax Assets and Liabilities - USD ($)	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Assets:
General business credit carryforward	$ 26,523,000	$ 3,897,000
Accrued liabilities	308,000	687,000
State net operating loss carryforward	294,000	241,000
Other items	647,000	576,000
Valuation allowance	(232,000)	(241,000)	$ (417,000)	$ (1,151,000)
Total	27,540,000	5,160,000
Liabilities:
Basis in pass through entities, including depreciation	(25,725,000)	(26,717,000)
Other	(157,000)	(149,000)
Total	(25,882,000)	(26,866,000)
Net deferred tax asset (liability)	$ 1,658,000	$ (21,706,000)

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