Revenue Recognition and Contracts with Customers - Disaggregation (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Revenue:
Revenues	$ 31,051	$ 23,173
Equipment
Revenue:
Revenues	20,827	15,898
Intrusion and access alarm
Revenue:
Revenues	9,796	7,325
Door locking devices
Revenue:
Revenues	11,031	8,573
Services
Revenue:
Revenues	$ 10,224	$ 7,275