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2. Revenue (Details - Revenues by product line) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Revenues $ 16,585 $ 13,228 $ 33,731 $ 25,969
IoT [Member]        
Revenues 13,402 11,180 28,022 21,401
REM [Member]        
Revenues 3,095 1,832 5,497 4,133
Other [Member]        
Revenues $ 88 $ 216 $ 212 $ 435