Postgresql – How to get a COUNT for both IN and NOT IN a table

I have a table that contains a master list of items and an associated table that contains a unique text string only on specific values (determined by the application that inserts the data).

Example:
Master Table (Assets)

Asset_ID    IP Address           Operating System    Host Name
1           123.456.789.125      Windows             BobsComputer
2           987.654.321.126      Windows             TomsComputer
3           456.123.789.127      Windows             JennysComputer

The associated table Unique_ID looks like this, joined on the Asset_ID

Special_ID  Asset_ID    Unique_ID
1           1           xhsieriyfh0308487
2           3           098uindifnoei8384

What I am trying to get is a query that gives me a count of all items both IN Unique_ID and NOT IN Unique_ID
Essentially the output I'm looking for is:

With_Unique_ID      Without_Unique_ID
2                   1

I know it has something to do with making subqueries but I can't seem to find the right syntax/command order to make it work.
It's postgresql if that makes a difference.