Consolidated Balance Sheets - USD ($) $ in Thousands	Jul. 31, 2018	Jul. 31, 2017
Current Assets
Cash and cash equivalents	$ 12,757	$ 9,095
Short-term investments	7,124	23,576
Accounts receivable, less allowance of $817 and $748 in 2018 and 2017, respectively	33,602	32,750
Inventories	22,521	22,615
Prepaid repairs expense	4,111	3,890
Prepaid expenses and other assets	2,899	2,304
Total Current Assets	83,014	94,230
Property, Plant and Equipment
Buildings and leasehold improvements	38,534	37,284
Machinery and equipment	141,530	136,900
Office furniture and equipment	11,089	10,356
Vehicles	14,151	13,615
Gross depreciable assets	205,304	198,155
Less accumulated depreciation and amortization	(149,385)	(140,411)
Net depreciable assets	55,919	57,744
Construction in progress	13,985	9,649
Land and mineral rights	16,802	16,640
Total Property, Plant and Equipment, Net	86,706	84,033
Other Assets
Goodwill	9,262	9,034
Trademarks and patents, net of accumulated amortization of $267 and $238 in 2018 and 2017, respectively	1,220	1,223
Customer list, net of accumulated amortization of $5,540 and $4,601 in 2018 and 2017, respectively	2,245	3,184
Deferred income taxes	7,349	14,396
Other	4,886	6,475
Total Other Assets	24,962	34,312
Total Assets	194,682	212,575
Current Liabilities
Current maturities of notes payable	3,083	3,083
Accounts payable	6,543	9,594
Dividends payable	1,627	1,553
Accrued expenses
Salaries, wages and commissions	8,974	7,917
Trade promotions and advertising	1,280	2,253
Freight	1,767	1,606
Other	7,675	6,948
Total Current Liabilities	30,949	32,954
Noncurrent Liabilities
Notes payable, net of unamortized debt issuance costs of $60 and $89 in 2018 and 2017, respectively	6,107	9,161
Deferred compensation	6,100	11,537
Pension and postretirement benefits	15,906	29,161
Other	3,735	3,725
Total Noncurrent Liabilities	31,848	53,584
Total Liabilities	62,797	86,538
Stockholders’ Equity
Additional paid-in capital	38,473	36,242
Retained earnings	158,935	154,735
Noncontrolling interest	(18)	0
Accumulated Other Comprehensive Loss
Pension and postretirement benefits	(10,384)	(10,327)
Cumulative translation adjustment	(231)	35
Total Accumulated Other Comprehensive Loss	(10,615)	(10,292)
Less Treasury Stock, at cost (2,914,092 Common and 324,741 Class B shares in 2018 and 2,907,307 Common and 324,741 Class B shares in 2017)	(55,946)	(55,701)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	131,885	126,037
Total Liabilities and Stockholders’ Equity	194,682	212,575
Common Stock
Stockholders’ Equity
Common Stock, par value $.10	809	802
Common Class B
Stockholders’ Equity
Common Stock, par value $.10	$ 247	$ 251