Inventories - Losses on Valuation of Inventory (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Inventory Disclosure [Abstract]
Losses incurred on valuation of inventory and write-off of obsolete inventory	$ 1,235	$ 188

Loss On Inventory Valuation With Obsolete Inventory Write Off

No definition available.

Name:	clro_LossOnInventoryValuationWithObsoleteInventoryWriteOff
Namespace Prefix:	clro_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration