Leases (Details) $ in Thousands	May 02, 2020 USD ($)
Lease extension options [Abstract]
Lessee extension options included in the lease liability and right-of-use assets	$ 0
Leases not yet commenced [Abstract]
Operating and finance Lease commitments that have not yet commenced	$ 0

The value of the lessee's operating and finance leases which have not yet commenced.

No definition available.

Name:	imbi_LesseeOperatingandFinanceLeasesNotYetCommencedAmount
Namespace Prefix:	imbi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant