It’s not all bad news these days where H. Wayne Huizenga companies are concerned.

The Fort Lauderdale billionaire, who lately has been struggling with his auto-retailing empire, AutoNation Inc., a decade ago joined some associates in buying a controlling stake in a tiny Massachusetts drug testing outfit called Psychemedics Inc. Though the company has grown from $1 million in revenue to about $20 million, it’s been held back, in part because the federal government hasn’t certified hair testing to detect drug use, as is the case with urinalysis.