Annual report pursuant to Section 13 and 15(d)

Revenue Recognition from Contracts with Customers (Details)

v3.21.2
Revenue Recognition from Contracts with Customers (Details) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Revenue from Contract with Customer [Abstract]    
Revenue related to filter product sales   $ 5
Contract liability $ 125  
Revenue expected to be recognized $ 2,500