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NASDAQ Listing Qualifications (Detail Textuals) (NASDAQ) | 0 Months Ended
--- | ---
Oct. 29, 2013 Day | Nov. 13, 2012 Day
NASDAQ |  |
Entity Listings [Line Items] |  |
Bid price description | $1.00 per share or greater | fallen below $1.00
Number of consecutive trading days |  | 30
Number of business days | 10 |

X
- Definition Describes the movement of bid price of common stock. + References No definition available. + Details
Name: | astc_BidPriceDescription
Namespace Prefix: | astc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents number of business days. + References No definition available. + Details
Name: | astc_NumberOfBusinessDays
Namespace Prefix: | astc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents number of consecutive trading days. + References No definition available. + Details
Name: | astc_NumberOfConsecutiveTradingDays
Namespace Prefix: | astc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | dei_EntityListingsLineItems
Namespace Prefix: | dei_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration