Consolidated Balance Sheets - USD ($) $ in Thousands	Jul. 31, 2021	Jul. 31, 2020
Current Assets
Cash and cash equivalents	$ 24,591	$ 40,890
Accounts receivable, less allowance of $1,174 and $1,078 in 2021 and 2020, respectively	40,923	34,911
Inventories, net	23,598	23,893
Prepaid repairs expense	6,088	5,662
Prepaid expenses and other assets	6,742	3,064
Total Current Assets	101,942	108,420
Property, Plant and Equipment
Buildings and leasehold improvements	40,181	39,274
Machinery and equipment	162,930	152,583
Office furniture and equipment	21,685	21,502
Vehicles	17,543	17,863
Gross depreciable assets	242,339	231,222
Less accumulated depreciation and amortization	(178,885)	(169,040)
Net depreciable assets	63,454	62,182
Construction in progress	14,627	13,717
Land and mineral rights	17,859	17,049
Total Property, Plant and Equipment, Net	95,940	92,948
Other Assets
Goodwill	9,262	9,262
Trademarks and patents, net of accumulated amortization of $385 and $457 in 2021 and 2020, respectively	1,743	1,566
Customer list, net of accumulated amortization of $7,321 and $6,887 in 2021 and 2020, respectively	464	898
Deferred income taxes	2,096	7,302
Operating lease right-of-use assets	8,619	9,816
Other	7,500	5,670
Total Other Assets	29,684	34,514
Total Assets	227,566	235,882
Current Liabilities
Current maturities of notes payable	1,000	1,000
Accounts Payable	9,206	12,529
Dividends payable	1,865	1,808
Operating lease liabilities	2,036	2,170
Accrued Expenses	24,883	28,700
Total Current Liabilities	38,990	46,207
Noncurrent Liabilities
Notes payable, net of unamortized debt issuance costs of $122 and $150 in 2021 and 2020, respectively	7,878	8,848
Deferred compensation	4,370	5,140
Pension and postretirement benefits	4,922	15,140
Long-term operating lease liabilities	8,022	9,135
Other	4,152	3,448
Total Noncurrent Liabilities	29,344	41,711
Total Liabilities	68,334	87,918
Stockholders’ Equity
Additional paid-in capital	48,271	44,993
Retained earnings	180,443	176,579
Noncontrolling interest	(307)	(174)
Accumulated Other Comprehensive Loss
Pension and postretirement benefits	(4,428)	(11,994)
Cumulative translation adjustment	311	(260)
Total Accumulated Other Comprehensive Loss	(4,117)	(12,254)
Less treasury stock, at cost (3,192,702 Common and 346,491 Class B shares in 2021 and 3,090,230 Common and 335,816 Class B shares in 2020)	(66,154)	(62,269)
Total Stockholders’ Equity	159,232	147,964
Total Liabilities and Stockholders’ Equity	227,566	235,882
Common Stock
Stockholders’ Equity
Common Stock, par value $.10	856	845
Common Class B
Stockholders’ Equity
Common Stock, par value $.10	$ 240	$ 244