Revenue and Contract Receivables, net (Details) (USD $)	3 Months Ended				6 Months Ended
	Jan. 31, 2015		Jan. 31, 2014		Jan. 31, 2015		Jan. 31, 2014		Jul. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Billed Contracts Receivable	$ 24,480,583				$ 24,480,583				$ 26,863,708
Unbilled Contracts Receivable	23,434,806				23,434,806				23,694,451
Contracts Receivable, Gross	47,915,389				47,915,389				50,558,159
Allowance for doubtful accounts and contract adjustments	(5,966,241)		(5,336,972)		(5,966,241)		(5,336,972)
Total contract receivables, net	41,949,148				41,949,148				44,431,305
Contractual retainage balance included under billed contract receivable	0				0				0
Management anticipation for receivables collection					1 year
Contract receivables (in hundredths)	14.00%				14.00%				14.00%
Allowance for doubtful accounts receivables (in hundredths)	83.00%				83.00%				74.00%
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at beginning of period	6,395,057		5,639,291		6,126,854		5,592,800
Net increase (decrease) due to adjustments in the allowance for contract adjustments (1)	(56,337)	[1]	(288,131)	[1]	243,679	[1]	(258,403)	[1]
Net increase (decrease) due to adjustments in the allowance for doubtful accounts (2)	(372,479)	[2]	(11,688)	[2]	(404,292)	[2]	12,575	[2]
Transfer of reserves (to) from allowance for project disallowances (3)	0	[3]	(2,500)	[3]	0	[3]	(10,000)	[3]
Balance at end of period	5,966,241		5,336,972		5,966,241		5,336,972
United States, Canada and South America [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contracts Receivable, Gross	41,028,332				41,028,332				43,394,442
Allowance for doubtful accounts and contract adjustments	992,667				992,667				1,611,068
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at beginning of period									(1,611,068)
Balance at end of period	(992,667)				(992,667)				(1,611,068)
Middle East and Africa [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contracts Receivable, Gross	6,758,171				6,758,171				7,010,225
Allowance for doubtful accounts and contract adjustments	4,973,574				4,973,574				4,386,240
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at beginning of period									(4,386,240)
Balance at end of period	(4,973,574)				(4,973,574)				(4,386,240)
Asia [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Contracts Receivable, Gross	128,886				128,886				153,492
Allowance for doubtful accounts and contract adjustments	0				0				129,546
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at beginning of period									(129,546)
Balance at end of period	$ 0				$ 0				$ (129,546)

[1] Increases (decreases) to the allowance for contract adjustments on the condensed consolidated balance sheets are recorded as (decreases) increases to revenue, net on the condensed consolidated statements of operations.

[2] Increases (decreases) to the allowance for doubtful accounts on the condensed consolidated balance sheets are recorded as increases (decreases) to administrative and other indirect operating expenses on the condensed consolidated statements of operations.

[3] Refer to Note 11 of these condensed consolidated financial statements for a summary of the allowance for project disallowances.