With revenue last year of $1.4bn CHC is still a billion dollar business. Investor perception and actual value are different. Shell is a $400bn revenue firm but is not valued that highly either as a business by investors.
It's rare for industrial companies to have earning multiples of more than their revenue owing to the likelihood that their revenue will be similar next year. By comparison, a tech company might be worth a lot more next year as it might grow rapidly and investors factor that into their pricing today.
Dull but largely true.
CHC is still a right sh!t show though...