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Stock-Based Compensation (Tables)
 3 Months Ended
Oct. 31, 2021
Share-based Payment Arrangement [Abstract]  
Summary of stock-based awards outstanding by award type
As of October 31, 2021, the following stock-based awards, by award type, were outstanding:
 October 31, 2021
Stock options1,015,965 
Performance shares261,330 
RSUs and restricted stock566,270 
Share units237,741 
Total2,081,306 
Stock-based compensation for awards detailing where recorded in Consolidated Statement of Operations
Stock-based compensation for awards issued is reflected in the following line items in our Condensed Consolidated Statements of Operations:
 Three months ended October 31,
 20212020
Cost of sales$73,000 73,000 
Selling, general and administrative expenses772,000 542,000 
Research and development expenses76,000 84,000 
Stock-based compensation expense before income tax benefit
921,000 699,000 
Estimated income tax benefit(193,000)(144,000)
Net stock-based compensation expense$728,000 555,000 
Summary of stock-based compensation expense by award type
Stock-based compensation expense (benefit), by award type, is summarized as follows:
Three months ended October 31,
20212020
Stock options$78,000 120,000 
Performance shares349,000 222,000 
RSUs and restricted stock856,000 922,000 
ESPP55,000 51,000 
Share units(417,000)(616,000)
Stock-based compensation expense before income tax benefit
921,000 699,000 
Estimated income tax benefit(193,000)(144,000)
Net stock-based compensation expense$728,000 555,000 
Summary of the Plan's activity relating to stock options
The following table summarizes the Plan's activity:
 Awards
(in Shares)		Weighted Average
Exercise Price		Weighted Average
Remaining Contractual
Term (Years)		Aggregate
Intrinsic Value
Outstanding at July 31, 20211,073,435 $25.76   
Expired/canceled(56,250)27.59   
Exercised(1,220)17.88   
Outstanding at October 31, 20211,015,965 $25.66 4.19$1,087,000 
Exercisable at October 31, 2021780,525 $28.01 2.87$218,000 
Vested and expected to vest at October 31, 20211,003,360 $25.76 4.13$1,041,000 
Summary of the Plan's activity relating to performance shares, RSUs, restricted stock and share units
The following table summarizes the Plan's activity relating to performance shares, RSUs, restricted stock and share units:
  Awards
(in Shares)		Weighted Average
Grant Date
Fair Value
Aggregate
Intrinsic Value
Outstanding at July 31, 2021 1,068,370 $21.93 
Granted 228,161 26.81 
Settled (190,310)23.97 
Canceled/Forfeited (40,880)23.15 
Outstanding at October 31, 2021 1,065,341 $22.56 $22,979,000 
  
Vested at October 31, 2021 353,816 $21.94 $7,632,000 
  
Vested and expected to vest at October 31, 2021 1,015,655 $22.54 $21,908,000