Revenue Recognition and Contracts with Customers - Disaggregation (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Revenue:
Revenues	$ 114,035	$ 101,359	$ 102,932
Equipment
Revenue:
Revenues	80,131	77,314	85,505
Intrusion and access alarm
Revenue:
Revenues	36,794	31,310	31,557
Door locking devices
Revenue:
Revenues	43,337	46,004	53,948
Services
Revenue:
Revenues	$ 33,904	$ 24,045	$ 17,427