Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2018	Jan. 31, 2017
Net (Loss) Income	$ (1,096)	$ 4,250	$ 1,954	$ 6,259
Other Comprehensive Income:
Pension and postretirement benefits (net of tax)	237	309	418	578
Cumulative translation adjustment	144	63	70	49
Other Comprehensive Income	381	372	488	627
Total Comprehensive (Loss) Income	$ (715)	$ 4,622	$ 2,442	$ 6,886