XML 49 R36.htm IDEA: XBRL DOCUMENT
v3.25.3

Note 3 - Leases (Details Textual) |  | 3 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
May 01, 2025 USD ($) | Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($) | Jan. 29, 2025 USD ($) a | Dec. 01, 2022 | Nov. 22, 2022 ft² | Apr. 27, 2021 ft²
Lessee, Operating Lease, Liability, to be Paid |  | $ 2,956,000 |  |  |  |  |
Operating Lease, Payments |  | 63,000 | $ 43,000 |  |  |  |
Finance Lease, Principal Payments |  | $ 8,000 | $ 45,000 |  |  |  |
Austin, Texas [Member] | Research And Development Facility [Member] |  |  |  |  |  |  |
Area of Real Estate Property (Square Foot) | ft² |  |  |  |  |  |  | 5,960
Austin, Texas [Member] | Subleased Facility [Member] |  |  |  |  |  |  |
Area of Real Estate Property (Square Foot) | ft² |  |  |  |  |  | 3,900 |
Lessee, Operating Lease, Term of Contract (Month) |  |  |  |  | 29 months |  |
Austin, Texas [Member] | Donley Facilities [Member] |  |  |  |  |  |  |
Operating Lease, Monthly Rent | $ 14,186 |  |  |  |  |  |
Austin, Texas [Member] | Metric Facility [Member] |  |  |  |  |  |  |
Area of Real Estate Property (Square Foot) | a |  |  |  | 17,628 |  |  |
Lessee, Operating Lease, Term of Contract (Month) |  |  |  | 89 months |  |  |
Lessee, Operating Lease, Liability, to be Paid |  |  |  | $ 3,000,000 |  |  |
Lessee, Operating Leases, Tenant Allowance |  |  |  | $ 317,300 |  |  |

X
- Definition Represents the amount of tenant allowance for an operating lease. + References No definition available. + Details
Name: | astc_LesseeOperatingLeasesTenantAllowance
Namespace Prefix: | astc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of monthly rent under operating lease. + References No definition available. + Details
Name: | astc_OperatingLeaseMonthlyRent
Namespace Prefix: | astc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Area of a real estate property. + References No definition available. + Details
Name: | us-gaap_AreaOfRealEstateProperty
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of cash outflow for principal payment on finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (g)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-4 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 5 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479041/842-20-45-5 + Details
Name: | us-gaap_FinanceLeasePrincipalPayments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of lessee's undiscounted obligation for lease payment for operating lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 942 -SubTopic 235 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477314/942-235-S99-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-4 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-6 + Details
Name: | us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-3 + Details
Name: | us-gaap_LesseeOperatingLeaseTermOfContract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 5 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479041/842-20-45-5 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (g)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-4 + Details
Name: | us-gaap_OperatingLeasePayments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | srt_StatementGeographicalAxis=astc_AustinTexasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=astc_ResearchAndDevelopmentFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=astc_SubleasedFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=astc_DonleyFacilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=astc_MetricFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |