Tellurian Inc. Annual report pursuant to Section 13 and 15(d)

SUBSEQUENT EVENTS (Details) - USD ($) $ in Thousands, shares in Millions		2 Months Ended	12 Months Ended
	Mar. 23, 2020	Feb. 24, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Feb. 09, 2021
Subsequent Event [Line Items]
Fees and commissions on sale of stock			$ 3,989	$ 0	$ 4,090
Proceeds from warrant exercise			$ 1,000	$ 0	$ 0
2019 Term Loan \| Loans Payable
Subsequent Event [Line Items]
Repayments of debt principal	$ 19,100
At-the-market program
Subsequent Event [Line Items]
Number of shares issued in transaction (in shares)			43.7
Net proceeds from sale of stock			$ 53,800
Sale of stock, remaining capacity for sale amount			$ 333,800
Subsequent Event \| 2018 Term Loan \| Loans Payable
Subsequent Event [Line Items]
Repayments of debt principal		$ 43,000
Subsequent Event \| Replacement and Third Amendment Warrants \| 2019 Term Loan
Subsequent Event [Line Items]
Repayments of debt principal		$ 5,600
Number of shares for purchase under warrant (in shares)		6.0
Proceeds from warrant exercise		$ 8,200
Subsequent Event \| At-the-market program
Subsequent Event [Line Items]
Number of shares issued in transaction (in shares)		25.6
Net proceeds from sale of stock		$ 57,200
Fees and commissions on sale of stock		$ 1,800
Sale of stock, remaining capacity for sale amount						$ 274,900