Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition from Contracts with Customers (Details)

v3.20.4
Revenue Recognition from Contracts with Customers (Details) - USD ($)
$ in Thousands
6 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Revenue Recognition from Contracts with Customers (Details) [Line Items]    
Contract liabilities related to sale of amplifiers $ 57  
Opening contract liability   $ 5
Opening contract asset balance 54  
Revenue expected to be recognized $ 3,800  
Non-recurring engineering services [Member]    
Revenue Recognition from Contracts with Customers (Details) [Line Items]    
Opening contract liability   $ 198