New documentary details unique evolution of Cohen's poetic hymn 'Hallelujah'

The 'Hallelujah: Leonard Cohen, A Journey, A Song' documentary is an exploration of the Canadian singer-songwriter as seen through the prism of his internationally renowned hymn, 'Hallelujah.' Photo: AP

Leonard Cohen's song Hallelujah pretty much flopped when it came out nearly 40 years ago.

Today, it enjoys cult status and has been performed by everyone from Bob Dylan to Jeff Buckley and Bon Jovi - even appearing in animated hit Shrek - in a unique evolution detailed in a new documentary film.