Leases - Schedule of Future Minimum Lease Payments Under Non-cancelable Leases Including Leases (Detail) $ in Thousands	Sep. 30, 2020 USD ($)
Operating Lease
2021	$ 325
2022	318
2023	314
2024	312
2025	298
Thereafter	6,944
Total lease payments	8,511
Less: Interest	3,350
Present value of lease liabilities	$ 5,161
Operating Lease, Liability, Statement of Financial Position [Extensible List]	asys:AccruedLiabilitiesCurrentAndFinanceAndOperatingLeaseLiabilityNoncurrent
Finance Lease
2021	$ 12
2022	8
2023	7
2024	2
Total lease payments	29
Less: Interest	2
Present value of lease liabilities	$ 27
Finance Lease, Liability, Statement of Financial Position [Extensible List]	asys:AccruedLiabilitiesCurrentAndFinanceAndOperatingLeaseLiabilityNoncurrent
Operating Lease and Finance lease
2021	$ 337
2022	326
2023	321
2024	314
2025	298
Thereafter	6,944
Total lease payments	8,540
Less: Interest	3,352
Present value of lease liabilities	$ 5,188

Operating and finance lease liabilities undiscounted excess amount.

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Operating and finance lease liability.

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Present value of lessee's discounted obligation for lease payments from finance lease.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
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-URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980

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Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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