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Subsequent Events - Additional Information (Details) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Feb. 29, 2016 | Jan. 02, 2016
Subsequent Event [Line Items] |  |
Lease expiration date |  | Feb. 28, 2017
Fourth Amendment to Lease | Subsequent Event |  |
Subsequent Event [Line Items] |  |
Lease expiration date | Feb. 28, 2019 |

X
- Definition Date which lease or group of leases is set to expire, in CCYY-MM-DD format. + References No definition available. + Details
Name: | us-gaap_LeaseExpirationDate1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LeaseArrangementTypeAxis=irix_FourthAmendmentToLeaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |