XML 16 R3.htm IDEA: XBRL DOCUMENT v3.22.0.1
Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
Jan. 31, 2022
Jul. 31, 2021
Stockholders’ equity:    
Series A convertible preferred stock, par value per share (in dollars per share) $ 0.10  
Series A convertible preferred stock, shares authorized (in shares) 125,000  
Series A convertible preferred stock, par value (in shares) 100,000  
Convertible preferred stock, accrued dividends $ 549,000  
Preferred stock, par value (in dollars per share) $ 0.10 $ 0.10
Preferred stock, shares authorized (in shares) 1,875,000 1,875,000
Common stock, par value (in dollars per share) $ 0.10 $ 0.10
Common stock, shares authorized (in shares) 100,000,000 100,000,000
Common stock, shares issued (in shares) 41,553,244 41,281,812
Treasury stock, shares (in shares) 15,033,317 15,033,317