  Asymmetric dark matter (ADM) has been an attractive possibility attempting to
explain the observed ratio of baryon to dark matter abundance in the universe.
While a bosonic ADM is constrained by the limits from existence of old neutron
stars, a fermionic ADM requires an additional light particle in order to
annihilate its symmetric component in the early universe. We revisit the
phenomenology of a minimal GeV scale fermionic ADM model including a light
scalar state. The current constraints on this scenario from cosmology, dark
matter direct detection, flavour physics and collider searches are investigated
in detail. We estimate the future reach on the model parameter space from
next-generation dark matter direct detection experiments, Higgs boson property
measurements and search for light scalars at the LHC, as well as the
determination of Higgs invisible branching ratio at the proposed ILC.
