Consolidated Statements of Operations Parenthetical (Parentheticals) (USD $)	3 Months Ended	9 Months Ended
Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Consolidated Statement of Operations Parenthetical [Abstract]
Tax provision, discontinued operations	$ 0	$ 0	$ 0	$ 0

Tax benefit in realtion to loss from discontinued operations

No definition available.

Name:	hrt_TaxBenefitDiscontinuedOperations
Namespace Prefix:	hrt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration