Subsequent Event (Details) (Subsequent Event [Member], MRV Communications Americas, Inc. [Member], USD $) In Millions, unless otherwise specified	0 Months Ended
Apr. 02, 2015	Apr. 02, 2015
Subsequent Event [Member] \| MRV Communications Americas, Inc. [Member]
Subsequent Event [Line Items]
Lessee Leasing Arrangements, Operating Leases, Base Rent	$ 0.3
Renewal term	5 years
Rent abatement	$ 0.2	$ 0.2

Term of the lessee's leasing arrangement renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	us-gaap_LesseeLeasingArrangementsOperatingLeasesRenewalTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration