Revenue Recognition and Contracts with Customers (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Major Product Lines:
Equipment Revenues		$ 20,597	$ 19,042	$ 60,872	$ 55,926
Services		4,546	3,158	12,476	8,560
Total Revenues	[1]	25,143	22,200	73,348	64,486
Intrusion and access alarm products [Member]
Major Product Lines:
Equipment Revenues		8,113	6,859	22,928	20,011
Door locking devices [Member]
Major Product Lines:
Equipment Revenues		$ 12,484	$ 12,183	$ 37,944	$ 35,915

[1] All of the Company's sales originate in the United States and are shipped primarily from the Company's facilities in the United States. There were no sales into any one foreign country in excess of 10% of total Net Sales.