Restatement of Consolidated Financial Statements, Consolidated Statement of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2016
Cash flows from operating activities [Abstract]
Net income (loss)	$ (104)	$ 2,511	$ 154
Adjustments to reconcile net income to net cash provided by operating activities [Abstract]
Impairment of long-lived assets	0	0	375
Depreciation and amortization	1,083	994	1,042
Provision for deferred income taxes	66	1,992	1,237
Share based compensation expense	127	69	28
Tax impact of share-based compensation	0	(6)	0
(Gain) loss on sale of assets and investment securities	17	(81)	135
Net recovery of contract adjustments	(830)	(1,178)	(910)
Net bad debt expense (recovery)	1,034	164	453
Changes in [Abstract]
- contract receivables	5,266	572	7,723
- other current assets	155	(178)	(626)
- income tax receivable	353	134	(390)
- equity method investment	(595)	(158)	(150)
- other non-current assets	(822)	(485)	(5)
- accounts payable	(2,023)	259	(2,789)
- accrued payroll costs	228	(110)	(1,430)
- income taxes payable	(44)	(86)	38
- billings in excess of revenue	807	(78)	145
- other accrued liabilities	(490)	(43)	109
Net cash provided by operating activities	4,228	4,292	5,139
Cash flows from investing activities [Abstract]
Purchase of property, building and equipment	(772)	(669)	(692)
Proceeds from sale of subsidiaries	0	75	150
Proceeds from sale of building and equipment	43	1,495	5
Proceeds from maturity of investments	0	0	26
Purchase of investment securities	(31)	(30)	(55)
Net cash (used in) provided by investing activities	(787)	871	(566)
Cash flows from financing activities [Abstract]
Dividends paid	(1,721)	(1,720)	(2,066)
Proceeds from debt	0	200	6
Repayment of debt	(389)	(241)	(547)
Net borrowings (repayment) of lines of credit	(342)	39	(162)
Distributions to noncontrolling interests	(454)	(8)	(345)
Net cash used in financing activities	(2,906)	(1,730)	(3,114)
Effect of exchange rate changes on cash and cash equivalents	76	(228)	(232)
Net increase in cash, cash equivalents and restricted cash	611	3,205	1,227
Cash, cash equivalents and restricted cash at beginning of period	13,135	9,930	8,703
Cash, cash equivalents and restricted cash at end of period	13,746	13,135	9,930
As Previously Reported [Member]
Cash flows from operating activities [Abstract]
Net income (loss)		2,953	608
Adjustments to reconcile net income to net cash provided by operating activities [Abstract]
Impairment of long-lived assets			375
Depreciation and amortization		1,040	1,143
Provision for deferred income taxes		1,924	1,697
Share based compensation expense		69	37
Tax impact of share-based compensation		(6)
(Gain) loss on sale of assets and investment securities		(81)	135
Net recovery of contract adjustments		(1,178)	(910)
Net bad debt expense (recovery)		244	453
Changes in [Abstract]
- contract receivables		(686)	7,394
- other current assets		(39)	(400)
- income tax receivable		(376)	(329)
- equity method investment		0	0
- other non-current assets		(14)	42
- accounts payable		1,160	(3,157)
- accrued payroll costs		(295)	(1,909)
- income taxes payable		(89)	40
- billings in excess of revenue		(498)	607
- other accrued liabilities		269	(29)
Net cash provided by operating activities		4,397	5,797
Cash flows from investing activities [Abstract]
Purchase of property, building and equipment		(721)	(722)
Proceeds from sale of subsidiaries		75	150
Proceeds from sale of building and equipment		1,495	5
Proceeds from maturity of investments			26
Purchase of investment securities		(29)	(55)
Net cash (used in) provided by investing activities		820	(596)
Cash flows from financing activities [Abstract]
Dividends paid		(1,720)	(2,066)
Proceeds from debt		200	6
Repayment of debt		(241)	(547)
Net borrowings (repayment) of lines of credit		246	(380)
Distributions to noncontrolling interests		(680)	(530)
Net cash used in financing activities		(2,195)	(3,517)
Effect of exchange rate changes on cash and cash equivalents		160	(226)
Net increase in cash, cash equivalents and restricted cash		3,182	1,458
Cash, cash equivalents and restricted cash at beginning of period	13,343	10,161	8,703
Cash, cash equivalents and restricted cash at end of period		13,343	10,161
GAC Deconsolidation Adjustments [Member]
Cash flows from operating activities [Abstract]
Net income (loss)		(190)	(252)
Adjustments to reconcile net income to net cash provided by operating activities [Abstract]
Impairment of long-lived assets			0
Depreciation and amortization		(46)	(31)
Provision for deferred income taxes		498	(434)
Share based compensation expense		0	0
Tax impact of share-based compensation		0
(Gain) loss on sale of assets and investment securities		0	0
Net recovery of contract adjustments		0	0
Net bad debt expense (recovery)		(80)	0
Changes in [Abstract]
- contract receivables		131	303
- other current assets		(168)	19
- income tax receivable		(503)	0
- equity method investment		(158)	(150)
- other non-current assets		(471)	(47)
- accounts payable		(185)	27
- accrued payroll costs		266	333
- income taxes payable		3	(62)
- billings in excess of revenue		420	(462)
- other accrued liabilities		(629)	110
Net cash provided by operating activities		(1,112)	(646)
Cash flows from investing activities [Abstract]
Purchase of property, building and equipment		52	30
Proceeds from sale of subsidiaries		0	0
Proceeds from sale of building and equipment		0	0
Proceeds from maturity of investments			0
Purchase of investment securities		(1)	0
Net cash (used in) provided by investing activities		51	30
Cash flows from financing activities [Abstract]
Dividends paid		0	0
Proceeds from debt		0	0
Repayment of debt		0	0
Net borrowings (repayment) of lines of credit		(207)	218
Distributions to noncontrolling interests		672	185
Net cash used in financing activities		465	403
Effect of exchange rate changes on cash and cash equivalents		(30)	(6)
Net increase in cash, cash equivalents and restricted cash		(626)	(219)
Cash, cash equivalents and restricted cash at beginning of period	(845)	(219)	0
Cash, cash equivalents and restricted cash at end of period		(845)	(219)
Out of Period Adjustments [Member]
Cash flows from operating activities [Abstract]
Net income (loss)		(252)	(202)
Adjustments to reconcile net income to net cash provided by operating activities [Abstract]
Impairment of long-lived assets			0
Depreciation and amortization		0	(70)
Provision for deferred income taxes		(430)	(26)
Share based compensation expense		0	(9)
Tax impact of share-based compensation		0
(Gain) loss on sale of assets and investment securities		0	0
Net recovery of contract adjustments		0	0
Net bad debt expense (recovery)		0	0
Changes in [Abstract]
- contract receivables		1,127	26
- other current assets		29	(245)
- income tax receivable		1,013	(61)
- equity method investment		0	0
- other non-current assets		0	0
- accounts payable		(716)	341
- accrued payroll costs		(81)	146
- income taxes payable		0	60
- billings in excess of revenue		0	0
- other accrued liabilities		317	28
Net cash provided by operating activities		1,007	(12)
Cash flows from investing activities [Abstract]
Purchase of property, building and equipment		0	0
Proceeds from sale of subsidiaries		0	0
Proceeds from sale of building and equipment		0	0
Proceeds from maturity of investments			0
Purchase of investment securities		0	0
Net cash (used in) provided by investing activities		0	0
Cash flows from financing activities [Abstract]
Dividends paid		0	0
Proceeds from debt		0	0
Repayment of debt		0	0
Net borrowings (repayment) of lines of credit		0	0
Distributions to noncontrolling interests		0	0
Net cash used in financing activities		0	0
Effect of exchange rate changes on cash and cash equivalents		(357)	0
Net increase in cash, cash equivalents and restricted cash		650	(12)
Cash, cash equivalents and restricted cash at beginning of period	$ 638	(12)	0
Cash, cash equivalents and restricted cash at end of period		$ 638	$ (12)

The increase (decrease) during the reporting period in equity method investments.

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