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v3.20.1

Revenue from Contracts with Customers Services (Details) $ in Millions | Mar. 31, 2020 USD ($)
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Revenue from Contract with Customer [Abstract] |
Remaining credits expected to be issued | $ 5.6

X
- Definition Remaining credits expected to be issued + References No definition available. + Details
Name: | tti_Remainingcreditsexpectedtobeissued
Namespace Prefix: | tti_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_RevenueFromContractWithCustomerAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration