License Agreements - Future Minimum Royalty Payments (Details) $ in Thousands	Dec. 31, 2020 USD ($)
License Agreements
2021	$ 228
2022	784
2023	74
Total	$ 1,086

Amount of required minimum royalty payments due in year three.

No definition available.

Name:	htbx_FutureMinimumRoyaltyPaymentsDueInThreeYears
Namespace Prefix:	htbx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant