What are these small, indoor bugs?
I doubt you'll get a positive ID from that photo. It might be some woodboring beetle, maybe genus Anobium or Hedobia. FTR, if they are chewing on your wooden floors, you might be able to hear them if you listen carefully.
I suggest you collect some, maybe even living, in a small tube and ask a specialist. My first idea would be someone at a nearby university or natural history museum working in entomology, and specifically on Coleoptera if possible.