Annual report pursuant to Section 13 and 15(d)

Subsequent Events (Details)

v2.4.1.9
Subsequent Events (Details) (Subsequent Event)
0 Months Ended 0 Months Ended
Apr. 01, 2015
Thermon Power Solutions, Inc.
USD ($)
Apr. 01, 2015
Thermon Power Solutions, Inc.
Apr. 01, 2015
Notes Payable, Other Payables
Macsu Fab Limited Partnership
USD ($)
Apr. 01, 2015
Minimum [Member]
Notes Payable, Other Payables
Macsu Fab Limited Partnership
USD ($)
Apr. 01, 2015
Canada, Dollars
Maximum [Member]
Notes Payable, Other Payables
Macsu Fab Limited Partnership
CAD
Subsequent Event [Line Items]          
Business acquisition, voting interest acquired (percentage)   75.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= thr_ThermonPowerSolutionsInc.Member
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
     
Payments to acquire businesses $ 10,925,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= thr_ThermonPowerSolutionsInc.Member
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
       
Debt instrument, face amount     5,905,000us-gaap_DebtInstrumentFaceAmount
/ dei_LegalEntityAxis
= thr_MacsuFabLimitedPartnershipMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
   
Debt instrument, maturity payment amount       $ 0thr_DebtInstrumentMaturityPaymentAmount
/ dei_LegalEntityAxis
= thr_MacsuFabLimitedPartnershipMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
7,500,000thr_DebtInstrumentMaturityPaymentAmount
/ us-gaap_CurrencyAxis
= currency_CAD
/ dei_LegalEntityAxis
= thr_MacsuFabLimitedPartnershipMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_NotesPayableOtherPayablesMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember