diff --git a/lib/type_id/base32.ex b/lib/type_id/base32.ex
index 16d4191..1bacc25 100644
--- a/lib/type_id/base32.ex
+++ b/lib/type_id/base32.ex
@@ -1,6 +1,12 @@
 defmodule TypeID.Base32 do
+  @moduledoc false
   import Bitwise
 
+  # Implements base 32 encoding using the a lowercase crockford alphabet
+  # https://www.crockford.com/base32.html
+
+  # Borrows heavily from the core `Base` module's implementation
+
   crockford_alphabet = ~c"0123456789ABCDEFGHJKMNPQRSTVWXYZ"
 
   to_lower_enc = &Enum.map(&1, fn c -> if c in ?A..?Z, do: c - ?A + ?a, else: c end)