Note 11. Shareholder's Equity (Detail) - Price Ranges of Outstanding and Exercisable Options (USD $)	12 Months Ended
Sep. 30, 2012
Outstanding options, number of options	2,989,620
Outstanding options, weighted average remaining contractual life	8 years 62 days
Outstanding options, weighted average exercise price (in Dollars per share)	$ 0.86
Exercisable options, number of options exercisable	1,028,563
Exercisable options, weighted average exercise price (in Dollars per share)	$ 0.92
Range of $0.01 - $0.75 [Member]
Outstanding options, number of options	1,359,667
Outstanding options, weighted average remaining contractual life	9 years 14 days
Outstanding options, weighted average exercise price (in Dollars per share)	$ 0.65
Exercisable options, number of options exercisable	44,000
Exercisable options, weighted average exercise price (in Dollars per share)	$ 0.68
Range of $0.76 - $1.00 [Member]
Outstanding options, number of options	1,053,703
Outstanding options, weighted average remaining contractual life	6 years 244 days
Outstanding options, weighted average exercise price (in Dollars per share)	$ 0.89
Exercisable options, number of options exercisable	853,703
Exercisable options, weighted average exercise price (in Dollars per share)	$ 0.90
Range of $1.01 - $1.10 [Member]
Outstanding options, number of options	79,000
Outstanding options, weighted average remaining contractual life	7 years 292 days
Outstanding options, weighted average exercise price (in Dollars per share)	$ 1.08
Exercisable options, number of options exercisable	47,004
Exercisable options, weighted average exercise price (in Dollars per share)	$ 1.07
Range of $1.11 - $3.00 [Member]
Outstanding options, number of options	497,250
Outstanding options, weighted average remaining contractual life	9 years
Outstanding options, weighted average exercise price (in Dollars per share)	$ 1.35
Exercisable options, number of options exercisable	83,856
Exercisable options, weighted average exercise price (in Dollars per share)	$ 1.20

Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

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- Definition

The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(c)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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- Definition

The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(a, b)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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- Definition

The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

+ References

+ Details

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- Definition

Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

+ Details

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