XML 59 R48.htm IDEA: XBRL DOCUMENT v3.20.4
Leases - Schedule of Operating Lease Costs (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jan. 31, 2021
Jan. 31, 2020
Jan. 31, 2021
Jan. 31, 2020
Leases [Abstract]        
Operating lease cost $ 79 $ 79 $ 238 $ 238
Short-term lease cost 7 12
Total lease cost $ 86 $ 79 $ 250 $ 238