Summary of Significant Accounting Policies - Customers with Accounts Receivable Greater than 10% (Detail) (Caterpillar Inc. [Member])	Dec. 31, 2013	Dec. 31, 2012
Caterpillar Inc. [Member]
Revenue, Major Customer [Line Items]
Customers with accounts receivable greater than 10%	20.90%	24.20%

Customers with accounts receivable greater than ten percent.

No definition available.

Name:	orbc_CustomersWithAccountsReceivableGreaterThanTenPercent
Namespace Prefix:	orbc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant