diff --git a/src/ixbrlparse/components/_base.py b/src/ixbrlparse/components/_base.py
index 05fa690..da5aff4 100644
--- a/src/ixbrlparse/components/_base.py
+++ b/src/ixbrlparse/components/_base.py
@@ -1,6 +1,6 @@
 from copy import deepcopy
 from datetime import date
-from typing import List, Optional, Union
+from typing import List, Optional, Tuple, Union
 
 
 class ixbrlFormat:  # noqa: N801
@@ -11,7 +11,7 @@ class ixbrlFormat:  # noqa: N801
     Attributes:
         format_names: A tuple of format names that this class should be used for."""
 
-    format_names: tuple[str, ...] = ()
+    format_names: Tuple[str, ...] = ()
 
     def __init__(
         self,
diff --git a/src/ixbrlparse/components/formats.py b/src/ixbrlparse/components/formats.py
index 83249ea..bd7dd05 100644
--- a/src/ixbrlparse/components/formats.py
+++ b/src/ixbrlparse/components/formats.py
@@ -1,7 +1,7 @@
 import datetime
 import re
 import warnings
-from typing import Optional, Type, Union
+from typing import Optional, Tuple, Type, Union
 
 from ixbrlparse.components._base import ixbrlFormat
 from ixbrlparse.hookspecs import hookimpl
@@ -118,7 +118,7 @@ class ixtNumDotDecimal(ixbrlFormat):  # noqa: N801
 
 
 class ixtDateFormat(ixbrlFormat):  # noqa: N801
-    format_names = ()
+    format_names: Tuple[str, ...] = ()
     date_format = "%Y-%m-%d"
 
     def parse_value(self, value: Union[str, int, float]) -> Optional[datetime.date]:
diff --git a/src/ixbrlparse/components/nonnumeric.py b/src/ixbrlparse/components/nonnumeric.py
index d4c0fa2..75b54c8 100644
--- a/src/ixbrlparse/components/nonnumeric.py
+++ b/src/ixbrlparse/components/nonnumeric.py
@@ -31,7 +31,7 @@ def __init__(
         self.context = context
         self.format: Optional[ixbrlFormat] = None
         self.text: Optional[str] = value
-        self.value = value
+        self.value: Optional[int | float | date | None | str] = value
         if isinstance(format_, str) and format_ != "" and self.text is not None:
             try:
                 self.format = get_format(format_)(format_=format_)