Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2017
Cash flows from operating activities:
Net income (loss)	$ (110)	$ (104)	$ 2,511
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,022	1,083	994
Provision for deferred income taxes	(1,326)	66	1,992
Share-based compensation expense	100	127	69
Tax impact of share-based compensation	0	0	(6)
(Gain) loss on sale of assets and investment securities	0	17	(81)
Net recovery of contract adjustments	(745)	(830)	(1,178)
Net bad debt expense	92	1,034	164
Changes in:
- contract receivables	806	5,266	572
- other current assets	(431)	155	(178)
- income tax receivable	337	353	134
- equity method investment	(15)	(595)	(158)
- other non-current assets	661	(822)	(485)
- accounts payable	468	(2,023)	259
- accrued payroll costs	590	228	(110)
- income taxes payable	0	(44)	(86)
- billings in excess of revenue	365	807	(78)
- other accrued liabilities	204	(490)	(43)
Net cash provided by operating activities	2,018	4,228	4,292
Cash flows from investing activities:
Acquisition of noncontrolling interest of subsidiaries	0	(27)	0
Proceeds from sale of subsidiaries	0	0	75
Purchase of property, building and equipment	(482)	(772)	(669)
Proceeds from sale of building and equipment	69	43	1,495
Purchase of investment securities	(33)	(31)	(30)
Net cash (used in) provided by investing activities	(446)	(787)	871
Cash flows from financing activities:
Dividends paid	(1,726)	(1,721)	(1,720)
Proceeds from debt	0	0	200
Repayment of debt	(53)	(389)	(241)
Net borrowings (repayments) under lines of credit	277	(342)	39
Distributions to noncontrolling interests	(299)	(454)	(8)
Net cash used in financing activities	(1,801)	(2,906)	(1,730)
Effect of exchange rate changes on cash and cash equivalents	75	76	(228)
Net (decrease) increase in cash, cash equivalents and restricted cash	(154)	611	3,205
Cash, cash equivalents and restricted cash at beginning of period	13,746	13,135	9,930
Cash, cash equivalents and restricted cash at end of period	13,592	13,746	13,135
Cash paid during the period for:
Interest	5	38	139
Income taxes	(50)	140	715
Supplemental disclosure of non-cash items:
Dividends declared and not paid	865	863	860
Proceeds from capital lease obligations	0	59	29
Acquisition of noncontrolling interest of subsidiaries (equipment)	$ (153)	$ 26	$ 0