Stockholders' Equity (Tables)

12 Months Ended

Jul. 31, 2016

Stockholders' Equity Note [Abstract]

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

A summary of the activity pursuant to the Company’s stock option plans for the years ended July 31, 2016, 2015, and 2014 is as follows:

	2016					2015					2014
	Options			Weighted - Average Exercise Price		Options			Weighted - Average Exercise Price		Options			Weighted - Average Exercise Price
Outstanding at beginning of year		1,358,104		$	3.04		1,155,910		$	5.03		726,645		$	10.39
New Grants		490,473		$	4.48		383,873		$	3.55		665,117		$	2.77
Exercised		(33,702	)	$	2.81		—		$	—		—		$	—
Expired		(6,000	)	$	3.61		(181,679	)	$	16.84		(236,852	)	$	15.80
Outstanding at end of year		1,808,875		$	3.43		1,358,104		$	3.04		1,155,910		$	5.03
Exercisable at end of year		1,094,794		$	2.95		782,688		$	2.88		399,262		$	7.66
Weighted average fair value of options granted during year				$	1.58				$	1.36				$	0.90

Schedule of Share based Compensation Stock Options Activity Range of Exercise Prices [Table Text Block]

The following table summarizes information for stock options outstanding at July 31, 2016:

	Options outstanding and exercisable
Range of Exercise prices	Shares		Weighted-Average Remaining Contractual Life in Years		Weighted-Average Exercise Price
$2.53 – $4.00		1,272,903		1.05	$	2.99
$4.01 – $5.61		535,972		0.56	$	4.49
		1,808,875

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

The following table summarizes the activity pursuant to restricted stock awards for the years ended July 31,

	2016						2015						2014
	Awards			Weighted - Average Award Price			Awards			Weighted - Average Award Price			Awards			Weighted - Average Award Price
Outstanding at beginning of year		21,501		$	8.84			42,502		$	5.74			125,133		$	3.45
Awarded		—		$	—			4,250		$	4.75			11,500		$	4.77
Vested		(11,500	)	$	(2.83	)		(19,418	)	$	(2.83	)		(82,971	)	$	(2.70	)
Forfeited		(1,500	)	$	(2.86	)		(5,833	)	$	(3.22	)		(11,160	)	$	(1.70	)
Outstanding (non-vested) at end of year		8,501		$	4.13			21,501		$	8.84			42,502		$	5.74
Weighted average market value of awards granted during year				$	—					$	4.75					$	4.77