Leases - Additional Information (Detail)	Sep. 30, 2019 USD ($)
Lessee Lease Description [Line Items]
Operating lease, liabilities current	$ 231,000
Finance lease, liabilities current	1,000
Operating lease, liabilities non-current	356,000
Finance lease, liabilities, non-current	4,000
Operating right-of-use assets	547,000
Finance lease right-of-use assets	$ 5,000
Minimum
Lessee Lease Description [Line Items]
Non-cancellable lease terms	3 years
Maximum
Lessee Lease Description [Line Items]
Non-cancellable lease terms	5 years