Employee Benefit Plan (Details)	12 Months Ended
Dec. 31, 2016
Defined Contribution Plan
Threshold age to be eligible to make catch-up contributions to the plan per IRS code	50 years

Represents the threshold age of employees to be eligible to make catch-up contributions to the plan per the IRS code.

No definition available.

Name:	trov_DefinedContributionPlanThresholdAgeCatchUpContribution
Namespace Prefix:	trov_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration