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Restatement of Unaudited Condensed Consolidated Financial Statements, Condensed Consolidated Statement of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 27, 2019	Apr. 28, 2018	Apr. 27, 2019	Apr. 28, 2018
Cash flows from operating activities [Abstract]
Net income	$ (954)	$ 165	$ (1,379)	$ 325
Adjustments to reconcile net income to net cash provided by operating activities [Abstract]
Depreciation and amortization	243	282	784	801
Provision for deferred income taxes			(53)	(61)
Share based compensation expense			127	94
Gain on sale of assets and investment securities			(40)	(19)
Net recoveries of contract adjustments				(60)
Net bad debt recoveries			(96)	(63)
Changes in [Abstract]
- contract receivables			795	7,773
- other current assets			(216)	72
- income tax receivable			(342)	266
- equity method investment			53	(376)
- other non-current assets			3	254
- accounts payable			(809)	(2,668)
- accrued payroll costs			(921)	(1,539)
- income taxes payable			0	286
- customer deposits			(331)	636
- other accrued liabilities			210	(295)
Net cash (used in) provided by operating activities			(2,217)	5,426
Cash flows from investing activities [Abstract]
Purchase of property, building and equipment			(371)	(654)
Proceeds from sale of building and equipment			69	19
Purchase of investment securities			(24)	(23)
Net cash used in investing activities			(326)	(658)
Cash flows from financing activities [Abstract]
Dividends paid			(1,726)	(1,721)
Repayment of debt			(43)	(373)
Net borrowings (repayment) of lines of credit			632	(356)
Distributions to noncontrolling interests			(177)	(322)
Net cash used in financing activities			(1,314)	(2,772)
Effect of exchange rate changes on cash and cash equivalents			(3)	(46)
Net increase in cash, cash equivalents and restricted cash			(3,860)	1,950
Cash, cash equivalents and restricted cash at beginning of period			13,746	13,135
Cash, cash equivalents and restricted cash at end of period	$ 9,886	15,085	$ 9,886	15,085
As Previously Reported [Member]
Cash flows from operating activities [Abstract]
Net income		407		459
Adjustments to reconcile net income to net cash provided by operating activities [Abstract]
Depreciation and amortization		291		827
Provision for deferred income taxes				380
Share based compensation expense				0
Gain on sale of assets and investment securities				(19)
Net recoveries of contract adjustments				(60)
Net bad debt recoveries				(96)
Changes in [Abstract]
- contract receivables				8,063
- other current assets				(46)
- income tax receivable				275
- equity method investment				0
- other non-current assets				(54)
- accounts payable				(2,784)
- accrued payroll costs				(1,409)
- income taxes payable				285
- customer deposits				505
- other accrued liabilities				(601)
Net cash (used in) provided by operating activities				5,725
Cash flows from investing activities [Abstract]
Purchase of property, building and equipment				(702)
Proceeds from sale of building and equipment				19
Purchase of investment securities				(23)
Net cash used in investing activities				(706)
Cash flows from financing activities [Abstract]
Dividends paid				(1,721)
Repayment of debt				(373)
Net borrowings (repayment) of lines of credit				(577)
Distributions to noncontrolling interests				(322)
Net cash used in financing activities				(2,993)
Effect of exchange rate changes on cash and cash equivalents				38
Net increase in cash, cash equivalents and restricted cash				2,064
Cash, cash equivalents and restricted cash at beginning of period				13,343
Cash, cash equivalents and restricted cash at end of period		15,407		15,407
Impact of GAC Deconsolidation [Member]
Cash flows from operating activities [Abstract]
Net income		(191)		(387)
Adjustments to reconcile net income to net cash provided by operating activities [Abstract]
Depreciation and amortization		(9)		(26)
Provision for deferred income taxes				(599)
Share based compensation expense				0
Gain on sale of assets and investment securities				0
Net recoveries of contract adjustments				0
Net bad debt recoveries				33
Changes in [Abstract]
- contract receivables				175
- other current assets				(5)
- income tax receivable				387
- equity method investment				(376)
- other non-current assets				296
- accounts payable				(117)
- accrued payroll costs				(130)
- income taxes payable				1
- customer deposits				131
- other accrued liabilities				306
Net cash (used in) provided by operating activities				(311)
Cash flows from investing activities [Abstract]
Purchase of property, building and equipment				48
Proceeds from sale of building and equipment				0
Purchase of investment securities				0
Net cash used in investing activities				48
Cash flows from financing activities [Abstract]
Dividends paid				0
Repayment of debt				0
Net borrowings (repayment) of lines of credit				221
Distributions to noncontrolling interests				0
Net cash used in financing activities				221
Effect of exchange rate changes on cash and cash equivalents				(71)
Net increase in cash, cash equivalents and restricted cash				(113)
Cash, cash equivalents and restricted cash at beginning of period				(208)
Cash, cash equivalents and restricted cash at end of period		(321)		(321)
Out of Period Adjustments [Member]
Cash flows from operating activities [Abstract]
Net income		(51)		253
Adjustments to reconcile net income to net cash provided by operating activities [Abstract]
Depreciation and amortization		0		0
Provision for deferred income taxes				158
Share based compensation expense				94
Gain on sale of assets and investment securities				0
Net recoveries of contract adjustments				0
Net bad debt recoveries				0
Changes in [Abstract]
- contract receivables				(465)
- other current assets				123
- income tax receivable				(396)
- equity method investment				0
- other non-current assets				12
- accounts payable				233
- accrued payroll costs				0
- income taxes payable				0
- customer deposits				0
- other accrued liabilities				0
Net cash (used in) provided by operating activities				12
Cash flows from investing activities [Abstract]
Purchase of property, building and equipment				0
Proceeds from sale of building and equipment				0
Purchase of investment securities				0
Net cash used in investing activities				0
Cash flows from financing activities [Abstract]
Dividends paid				0
Repayment of debt				0
Net borrowings (repayment) of lines of credit				0
Distributions to noncontrolling interests				0
Net cash used in financing activities				0
Effect of exchange rate changes on cash and cash equivalents				(13)
Net increase in cash, cash equivalents and restricted cash				(1)
Cash, cash equivalents and restricted cash at beginning of period				0
Cash, cash equivalents and restricted cash at end of period		$ (1)		$ (1)