Loan Payable - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
Loan Payable - Narrative (Details) - USD ($) $ in Thousands	Jun. 06, 2023	Jun. 30, 2024	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023	Jun. 05, 2023	Nov. 01, 2021	May 29, 2020
Debt Instrument [Line Items]
Repayments of debt			$ 8,195	$ 25,000
End of term fee		$ 1,400	1,400	$ 500
Loan payable, principal		41,805	41,805		$ 50,000
Loan payable, current portion		11,412	11,412		$ 0
Current maturities, gross		13,000	13,000
Debt issuance costs, current		$ 200	$ 200
Effective interest rate (as a percent)		21.80%	21.80%	18.20%
Interest expense, debt		$ 4,700		$ 5,800
Hercules Capital Inc
Debt Instrument [Line Items]
Accretion of end of term debt fees		1,400	$ 1,400
Loan Agreement \| Hercules Capital Inc \| Tranche One
Debt Instrument [Line Items]
Loan amount								$ 30,000
Loan Agreement \| Hercules Capital Inc \| Tranche Two
Debt Instrument [Line Items]
Loan amount								20,000
Loan Agreement \| Hercules Capital Inc \| Tranche Three
Debt Instrument [Line Items]
Loan amount								30,000
Loan Agreement \| Hercules Capital Inc \| Tranche Four
Debt Instrument [Line Items]
Loan amount								20,000
Loan Agreement \| Hercules Capital Inc \| Maximum
Debt Instrument [Line Items]
Loan amount								$ 100,000
Loan And Security Agreement \| Hercules Capital Inc \| Tranche One
Debt Instrument [Line Items]
End of term fee							$ 2,100
Fifth Amendment
Debt Instrument [Line Items]
End of term fee, pro-rata payment	$ 1,700
Repurchased face amount		8,200	$ 8,200
Debt prepayment cost		$ 500
Fifth Amendment \| Hercules Capital Inc
Debt Instrument [Line Items]
Loan amount	75,000
Repayments of debt	25,000
Loan payable, net of current portion	$ 50,000
Loan agreement, basis spread on variable rate	5.65%
Loan agreement, interest rate, stated percentage	9.15%
Percentage of prepayment loan amount for first year	3.00%
Percentage of prepayment loan amount for second year	2.00%
Percentage of prepayment loan amount for third year	1.00%
Debt instrument, covenant, unrestricted cash balance, percentage	35.00%
Minimum quarterly net product revenue covenant	$ 45,000
Debt instrument trailing net product revenue	6 months
Trailing six month product revenue covenant	$ 85,000
Fifth Amendment \| Hercules Capital Inc \| Tranche Four
Debt Instrument [Line Items]
Loan amount	$ 25,000					$ 15,000

G1 Therapeutics, Inc. 10-Q