XML 53 R41.htm IDEA: XBRL DOCUMENT
v3.21.1

Revenue Recognition - Additional Information (Details) - Source | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2021
Revenue From Contract With Customer [Abstract] |  |
Number of revenue resources | 2 | 2

X
- Definition Number of revenue resources. + References No definition available. + Details
Name: | astc_NumberOfRevenueResources
Namespace Prefix: | astc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_RevenueFromContractWithCustomerAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration