Income Taxes - Schedule of Federal Income Tax Rate and Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
Jul. 31, 2020	Jul. 31, 2019
Income tax benefit at the federal statutory rate, rate	21.00%	21.00%
Continuing Operations [Member]
Income tax benefit at the federal statutory rate	$ (35)	$ (337)
State income taxes, net of effect of federal taxes	(7)	(23)
Loss from extinguishment of debt		224
Expired net operating losses	7	138
Change in valuation allowance	35	(2)
Provision for income tax
Total
Income tax benefit at the federal statutory rate, rate	21.00%	21.00%
State income taxes, net of effect of federal taxes, rate	4.20%	1.50%
Loss from extinguishment of debt, rate	0.00%	(13.90%)
Expired net operating losses, rate	(4.20%)	(8.60%)
Change in valuation allowance, rate	(21.00%)	0.00%
Provision for income tax, rate	0.00%	0.00%
Total	0.00%	0.00%
Discontinued Operations [Member]
Income tax benefit at the federal statutory rate		$ (2)
State income taxes, net of effect of federal taxes
Change in valuation allowance		2
Provision for income tax
Total
Income tax benefit at the federal statutory rate, rate	0.00%	21.00%
State income taxes, net of effect of federal taxes, rate	0.00%	5.30%
Change in valuation allowance, rate	0.00%	(26.30%)
Provision for income tax, rate	0.00%	0.00%
Total	0.00%	0.00%

Expired net operating losses, rate.

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Loss from extinguishment of debt, rate.

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Effective income tax rate reconciliation provision for income tax rate.

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Expired net operating losses.

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Loss from extinguishment of debt.

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Effective income tax reconciliation provision for income tax.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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