Transcribing Lithuanian.

This is from Bernard Comrie's chapter on Balto-Slavic writing systems in Daniels and Bright's The World's Writing Systems. I have some questions about transcription into IPA.

English:

It was a small white kitten.

Lithuanian:

Tai buvo nedidelė balta katytė.

IPA:

/|tai \|buvoː nʲ\|dʲidʲɛle: bal\|ta ka\|tʲiːtʲeː

I don't know how I'm supposed to transcribe what I have here as \| and /|. In my text, the points come together. What are these called? what do they represent. Tone marks? SCI Unipad is not too helpful here.

Mark.