CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance at Jul. 31, 2013	$ 406	$ 304,288	$ (272,420)	$ 1,858	$ 34,132
Balance (in Shares) at Jul. 31, 2013	40,569,393
Net income (loss) for the year ended			(9,977)		(9,977)
Vesting of restricted stock	$ 1				1
Vesting of restricted stock (in Shares)	82,968
Share-based compensation charges		594			594
Net proceeds from Issuance of common stock	$ 34	11,508			11,542
Net proceeds from Issuance of common stock (in Shares)	3,421,176
Issuance of options in lieu of payment of cash bonuses		136			136
Issuance of common stock for employee 401(k) plan match	$ 2	634			$ 636
Issuance of common stock for employee 401(k) plan match (in Shares)	165,646				165,646
Foreign currency translation adjustments				(114)	$ (114)
Balance at Jul. 31, 2014	$ 443	317,160	(282,397)	1,744	36,950
Balance (in Shares) at Jul. 31, 2014	44,239,183
Net income (loss) for the year ended			(2,285)		(2,285)
Vesting of restricted stock (in Shares)	19,418
Share-based compensation charges		429			429
Net proceeds from Issuance of common stock	$ 16	6,672			6,688
Net proceeds from Issuance of common stock (in Shares)	1,588,480
Issuance of options in lieu of payment of cash bonuses		45			45
Issuance of common stock for employee 401(k) plan match	$ 2	660			$ 662
Issuance of common stock for employee 401(k) plan match (in Shares)	214,984				214,984
Foreign currency translation adjustments				117	$ (117)
Balance at Jul. 31, 2015	$ 461	324,966	(284,682)	1,861	42,606
Balance (in Shares) at Jul. 31, 2015	46,062,065
Net income (loss) for the year ended			45,286		45,286
Vesting of restricted stock (in Shares)	11,500
Share-based compensation charges		525			525
Issuance of options in lieu of payment of cash bonuses					0
Issuance of common stock for employee 401(k) plan match	$ 2	707			709
Issuance of common stock for employee 401(k) plan match (in Shares)	160,352
Exercise of stock options		90			$ 90
Exercise of stock options (in Shares)	33,702				33,702
Foreign currency translation adjustments				338	$ 338
Balance at Jul. 31, 2016	$ 463	$ 326,288	$ (239,396)	$ 2,199	$ 89,554
Balance (in Shares) at Jul. 31, 2016	46,267,619