This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 25

-Paragraph 23

-URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e1043-128460

Name:	us-gaap_BusinessCombinationAcquisitionRelatedCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Merger Agreement with comScore, Inc. (Details) - Merger Agreement [Member] $ in Millions		3 Months Ended	6 Months Ended
	Sep. 29, 2015	Sep. 30, 2015 USD ($)	Sep. 30, 2015 USD ($)
Business Acquisition [Line Items]
Number of comScore shares to be received for one Rentrak share	1.15
Selling, General and Administrative Expenses [Member]
Business Acquisition [Line Items]
Acquisition costs		$ 1.1	$ 1.1