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Revenue (Tables)
 6 Months Ended
Dec. 31, 2021
Revenue from Contract with Customer [Abstract]  
Net revenue by product lines
                    
   Three Months Ended December 31,  Six Months Ended December 31,
   2021  2020  2021  2020
   (In thousands)
IoT  $28,521   $13,402   $51,352   $28,022 
REM   4,977    3,095    9,743    5,497 
Other   183    88    291    212 
   $33,681   $16,585   $61,386   $33,731 
Net revenue by geographic region
                    
   Three Months Ended December 31,  Six Months Ended December 31,
   2021  2020  2021  2020
   (In thousands)
Americas  $20,073   $8,023   $38,300   $18,952 
EMEA   5,751    4,740    10,410    7,379 
Asia Pacific Japan   7,857    3,822    12,676    7,400 
   $33,681   $16,585   $61,386   $33,731 
Schedule of percentage total net revenues
                    
   Three Months Ended December 31,  Six Months Ended December 31,
   2021  2020  2021  2020
       
Product revenues   96%   93%   95%   93%
Service revenues   4%   7%   5%   7%
Changes in deferred revenue
   
Balance, June 30, 2021  $1,091 
New performance obligations   491 
Performance obligations acquired from acquisition   42 
Recognition of revenue from satisfying performance obligations   (653)
Balance, December 31, 2021   971 
Less: non-current portion of deferred revenue   (366)
Current portion, December 31, 2021  $605