XML 45 R34.htm IDEA: XBRL DOCUMENT v3.10.0.1
CONTRACT ASSETS AND LIABILITIES (Details) - USD ($)
Oct. 31, 2018
May 01, 2018
Apr. 30, 2018
Oct. 31, 2017
CONTRACT ASSETS AND LIABILITIES        
Contract assets $ 365,000 $ 102,000    
Contract liabilities 27,000   $ 219,000 $ 219,000
Increase in contract assets 365,000      
Decrease in contract liabilities $ 192,000