Debt and Capital Lease Obligations (Details) - USD ($) $ in Thousands	Apr. 28, 2018	Jul. 31, 2017
Debt Instrument [Line Items]
Total	$ 127	$ 448
Current portion of long-term debt and capital lease obligations	(60)	(382)
Long-term debt and capital lease obligations	67	66
Long-term Debt, by Maturity [Abstract]
2019	60
2020	46
2021	21
Total	127	448
Bank Loans [Member]
Debt Instrument [Line Items]
Total	$ 33	328
Interest rate	2.94%
Long-term Debt, by Maturity [Abstract]
Total	$ 33	328
Capital Lease Obligations [Member]
Debt Instrument [Line Items]
Total	94	120
Long-term Debt, by Maturity [Abstract]
Total	$ 94	$ 120
Capital Lease Obligations [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Interest rate	7.36%
Capital Lease Obligations [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Interest rate	17.07%

Contractual interest rate for funds borrowed, under the debt agreement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Amount of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Topic 210
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-Section S99
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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section S99
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-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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