Checking whether parentheses balance each other in Scala

balance.scala

  def balance(chars: List[Char]): Boolean = {
    def balIter(chars: List[Char], count: Int): Boolean = {
      if (chars.isEmpty){
        if (count == 0) true else false
      } else{
    	  if (chars.head.toString == ")") {
	        if (count < 1) false else balIter(chars.tail, count - 1)
	      } else if (chars.head.toString == "("){
	        balIter(chars.tail, count + 1)
	      } else {
	        balIter(chars.tail, count)
	      }
      }
    }
    balIter(chars, 0);
  }