Summary of Significant Accounting Policies (Details)		12 Months Ended
	Oct. 16, 2017	Jun. 30, 2019 USD ($) Facility	Jun. 30, 2018 USD ($)	Jun. 01, 2018 ft²
Property Plant And Equipment [Line Items]
Reverse stock split ratio	0.20
Allowance for doubtful accounts		$ 0	$ 0
Estimated useful life		5 years
Original lease area of land removed | ft²				8,118
Loss on impairment of long-lived assets		$ 0	1,693,000
ASU 2016-02
Property Plant And Equipment [Line Items]
Right-of-use asset		1,800,000
Lease liability		1,800,000
Cumulative impact of change in accounting policy		$ 200,000
Number of existing facility leases | Facility		2
1st Detect
Property Plant And Equipment [Line Items]
Loss on impairment of long-lived assets			114,000
1st Detect | ASU 2016-02
Property Plant And Equipment [Line Items]
Lease expiration year		2020
Lease term		5 years
Headquarters | ASU 2016-02
Property Plant And Equipment [Line Items]
Lease expiration year		2023
Astral Images, Inc
Property Plant And Equipment [Line Items]
Impairment charge of long-lived assets			1,600,000
Purchased Software
Property Plant And Equipment [Line Items]
Estimated useful life		3 years
Leasehold Improvements and Other Assets
Property Plant And Equipment [Line Items]
Loss on impairment of long-lived assets		$ 0	$ 114,000