XML 36 R25.htm IDEA: XBRL DOCUMENT v3.19.1
Stock-Based Compensation (Details Narrative) - USD ($)
6 Months Ended
Jan. 31, 2019
Jan. 31, 2018
Nov. 30, 2010
Unrecognized costs related to outstanding stock options    
Number of stock options granted  
Maximum [Member] | 2011 Stock Incentive Plan [Member]      
Maximum number of shares authorized for issuance under the plan     4,000,000