I'm quite happy with their cash operating margins. In Dec 16...

I'm quite happy with their cash operating margins. In Dec 16 their operating cashflow margin was 9.35%, in Mar 17 it was 26.4% and in the current Jun 17 quarter it was 40.1%. So clearly they are growing revenues faster than they are increasing expenses - which equals increasing margin. Assuming this trend continues into the future, or at least does not drop significantly from where it is now, then BIG has quite healthy operating margins.