Description of Business and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Jul. 31, 2016

Class of Stock [Line Items]

Schedule of weighted-average number of shares used in the calculation of basic and diluted earnings per share

	Years Ended
	July 31,
	2016		2015		2014
	(in thousands)
Basic weighted-average number of shares		11,871		11,457		10,667
Effect of dilutive securities:
Stock options		-		-		9
Non-vested restricted Class B common stock		-		-		591
Diluted weighted-average number of shares		11,871		11,457		11,267

Summary of shares excluded from the diluted earnings per share computations

	Years Ended
	July 31,
	2016		2015		2014
	(in thousands)
Stock options		3		4		-
Non-vested restricted Class B common stock		196		331		-
Shares excluded from the calculations of diluted earnings (loss) per share		199		335		-

Schedule of change in the allowance for doubtful accounts

Year ended July 31, (in thousands)		Balance at beginning of year		Additions charged to costs and expenses		Deductions		Balance at end of year
2016
Reserves deducted from accounts receivable:
Allowance for doubtful accounts	$	—	$	—	$	—	$	—
2015
Reserves deducted from accounts receivable:
Allowance for doubtful accounts	$	—	$	—	$	—	$	—

Stock options [Member] | Common Class B [Member]

Class of Stock [Line Items]

Schedule of stock options to purchase Class B common stock

	Years Ended
	July 31,
	2016		2015		2014
	(in thousands)
Stock options		88		-		-