2.4.0.80016 - Disclosure - Common Stock Warrants, Stock Options, and Employee Stock Benefit Plantruefalsefalse1falsefalsefalseFrom2012-10-01to2013-06-30http://www.sec.gov/CIK0000357108duration2012-10-01T00:00:002013-06-30T00:00:001true1irsn_CommonStockWarrantsAndStockBasedCompensationDetailsNarrativeAbstractirsn_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse02false2us-gaap_DisclosureOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTextBlockus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 45pt"><i>Common Stock Warrants.
</i>As of June 30, 2013, warrants to purchase a total of 44,737,000 shares of the Company’s common stock were outstanding,
with a weighted average exercise price of $0.16 per share and exercise prices ranging from $0.09 per share to $0.55 per share.
As of September 30, 2012, warrants to purchase a total of 28,416,000 shares of the Company’s common stock were outstanding,
with a weighted average exercise price of $0.21 per share and exercise prices ranging from $0.07 per share to $13.00 per share.</p>
<p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0"> </p>
<p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 45pt"><i>Stock Options.  </i>As
of June 30, 2013, the Company had 51.0 million options outstanding with a weighted average exercise price of $0.21, and 41.4 million
options exercisable with a weighted average exercise price of $0.23.   During the nine months ended June 30, 2013, there
were 4.7 million options granted and 1.1 million options exercised. As of September 30, 2012, the Company had 54.8 million
options outstanding with a weighted average exercise price of $0.24, and 34.5 million options exercisable with a weighted average
exercise price of $0.31.  The unvested options outstanding and options exercisable had no aggregate intrinsic value as
of June 30, 2013, as compared to a value of $115,000 and $297,000, respectively as of September 30, 2012.  At June 30,
2013, the total compensation costs related to non-vested option awards not yet recognized was $654,000.  The weighted-average
remaining vesting period of non-vested options at June 30, 2013 was 0.9 years.</p>
<p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0"> </p>
<p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 27pt"><i>      
Employee Stock Benefit Plan.    </i>The Company has established an employee retirement plan (the “<i>ESBP</i>”).
This plan provides for annual contributions to the Company’s Employee Stock Bonus Trust (“<i>SBT</i>”) to be
determined by the Board of Directors and which will not exceed 15% of total payroll.  As of June 30, 2013, the Company
has not made any contributions to the SBT related to Fiscal 2013.  Relating to Fiscal 2012 the Company made a contribution
of 6.0 million shares of common stock with an estimated market value of $600,000 to the SBT.</p>falsefalsefalsenonnum:textBlockItemTypenaTabular disclosure of components of a stock option or other award plan under which equity-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from equity-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from equity-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph 64, 65, A240
-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.
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