Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2014
Income (loss) from continuing operations before provision (benefit) for income taxes and noncontrolling interest [Abstract]
Domestic	$ 4,558	$ 3,500	$ (4,305)
Foreign	(191)	4,469	3,858
Income (loss) before income tax provision	4,367	7,969	(447)
Current [Abstract]
Federal	1,155	488	86
State	177	80	63
Foreign	730	2,047	1,012
Total current	2,062	2,615	1,161
Deferred [Abstract]
Federal	587	1,379	(975)
State	269	172	24
Foreign	841	(397)	133
Total deferred	1,697	1,154	(818)
Total income tax provision	3,759	3,769	343
Reconciliation of income tax provision from statutory U.S. income tax rate to the effective income tax rate [Abstract]
Income tax (benefit) provision at the U.S. federal statutory income tax rate	1,485	2,709	(152)
Income from "pass-through" entities taxable to noncontrolling partners	(39)	31	35
International rate differences	(145)	(338)	(144)
Other foreign taxes, net of federal benefit	153	161	(34)
Foreign dividend income	263	508	597
State taxes, net of federal benefit	312	166	28
Re-evaluation and settlements of tax contingencies	0	0	(20)
Peru non-deductible expenses	59	167	44
Other permanent differences	88	209	72
Total income tax provision	3,759	3,769	343
Deferred tax assets [Abstract]
Contract and other reserves					$ 3,023	$ 3,257
Accrued compensation and expenses					734	836
Net operating loss carryforwards					1,265	737
Foreign and state income taxes					59	57
Foreign tax credit					296	296
Federal benefit from foreign tax audits					157	212
Other					(26)	454
Deferred tax assets					5,508	5,849
Less: Valuation allowance	(2,278)	(560)	(398)		(2,278)	(560)	$ (398)
Net deferred tax assets					3,230	5,289
Deferred tax liabilities [Abstract]
Federal expense on state deferred taxes					(133)	(225)
Fixed assets and intangibles					(759)	(341)
Federal expense from foreign accounting differences					(213)	(542)
Net deferred tax liabilities					(1,105)	(1,108)
Amount of undistributed income that will not be indefinitely reinvested in foreign operations					100	0
Amount of undistributed income indefinitely reinvested in foreign operations					6,900
Deferred tax assets valuation allowance [Abstract]
Balance at beginning of period	560	398
Additions during the period	1,765	176
Reductions during period	(47)	(14)
Balance at end of period	2,278	560	398
Domestic operating income (losses)			(1,700)
Gross unrecognized tax benefits that would impact effective tax rate in future periods					100	100	$ 100
Unrecognized tax benefits, income tax penalties and interest accrued [Abstract]
Unrecognized tax benefits, income tax penalties and interest accrued					$ 100	100
Maximum [Member]
Unrecognized tax benefits, income tax penalties and interest expense [Abstract]
Unrecognized tax benefits, income tax penalties and interest expense	100	100	100
Canada And China [Member]
Reconciliation of income tax provision from statutory U.S. income tax rate to the effective income tax rate [Abstract]
Valuation allowance	1	156	(83)
Brazil [Member]
Reconciliation of income tax provision from statutory U.S. income tax rate to the effective income tax rate [Abstract]
Valuation allowance	$ 1,582	$ 0	$ 0
IRS [Member]
Income Tax Examination [Line Items]
Income tax examination, year subject to examination	2016	2015	2014	2013
Accounting Standards Update 2015-17 [Member]
Income Tax Examination [Line Items]
Deferred income tax assets non current						$ 3,900