|**Restructuring and Related Charges (Tables)**                                                 | 6 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                              
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|**Restructuring Charges [Abstract]**                                                           |                                                                                                                                                                                                                                                                                                                                                                                                                                             
|Reconciliation of the beginning and ending balances of the company's restructuring liabilities | Following is a reconciliation of the beginning and ending balances of the restructuring liability:Balance atBalance atMarch 31,September 30,(In thousands)2013ProvisionPayments2013Fiscal 2014 Restructuring Plan:Severance and employment costs$—$512$(160)$352Fiscal 2012 Restructuring Plan:Severance and employment costs348—(348)—Fiscal 2009 Restructuring Plan:Facilities costs236—(150)86Total restructuring costs$584$512$(658)$438
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|                                                                                               |                                                                                                                                                                                                                                                                                                                                                                                                                                             
|                                                                                               | Balance at                                                                                                                                                                                                                                                                                                                                                                                                                                  
|                                                                                               | March 31,                                                                                                                                                                                                                                                                                                                                                                                                                                   
|(In thousands)                                                                                 | 2013                                                                                                                                                                                                                                                                                                                                                                                                                                        
|Fiscal 2014 Restructuring Plan:                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                             
|Severance and employment costs                                                                 | $                                                                                                                                                                                                                                                                                                                                                                                                                                           
|Fiscal 2012 Restructuring Plan:                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                             
|Severance and employment costs                                                                 | 348                                                                                                                                                                                                                                                                                                                                                                                                                                         
|Fiscal 2009 Restructuring Plan:                                                                |                                                                                                                                                                                                                                                                                                                                                                                                                                             
|Facilities costs                                                                               | 236                                                                                                                                                                                                                                                                                                                                                                                                                                         
|Total restructuring costs                                                                      | $                                                                                                                                                                                                                                                                                                                                                                                                                                           

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                    duration X- DefinitionTabular disclosure of an entity's restructuring reserve that occurred during the period associated with the exit from or disposal of business activities or restructurings for each major type of cost. This element may also include a description of any reversal and other adjustment made during the period to the amount of an accrued liability for restructuring activities. This element may be used to encapsulate the roll forward presentations of an entity's restructuring reserve by type of cost and in total, and explanation of changes that occurred in the period.+ ReferencesReference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)(2)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747+ Details**Name:**
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