Depending on your part of the country this bug could be almost anything. Could you tell us more about the size and color, time of day, are they attracted to food or plants, or if you could a photograph.
Name: Kurt Woodbridge , Va (Zone 7a) Jai guru deva om
fungus gnats ?
A pint can't hold a quart , If it is holding a pint it is doing the best that it can.
and it is written ,
if the evil spirit arms the tiger with claws , brahman provided wings for the dove.
Maybe thrips? If so, and you don't have any houseplants, they shouldn't last long. Thrips feed on plants. Very odd that they're indoors — they could have come in on your clothing if you brushed against an infested plant.