Some tickers are available via api.get_barset() but not api.get_asset()

Calling api.get_asset('ARAV') in python yields "APIError: asset not found for ARAV" but calling api.get_barset('ARAV') returns correct bars. 'ARAV' is a small-cap traded on NASDAQ. I wonder if it is tradeable via alpaca and if so why doesn't api.get_asset('ARAV') see it. Any insight is greatly appreciated. Thanks.