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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