Inventories (Additional Information) (Narrative) (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Disclosure Inventories Additional Information [Abstract]
Gross Tooling Inventory	$ 9.9ldl_GrossToolingInventory	$ 9.9ldl_GrossToolingInventory
Tooling Inventory Net Of Progress Billings	$ 8.8	$ 8.8

The net amount of tooling inventory after the deduction of progress billings as of the balance sheet date.

No definition available.

Name:	ldl_ToolingInventoryNetOfProgressBillings
Namespace Prefix:	ldl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant