Does your broker allow shorting on this stock? Covered or uncovered? any other brokers that you are specifically aware of that are doing covered and/or uncovered shorting?
RAPT also should have new data on short positions today - what data do you use to determine short positions in a specific stock? http://www.otcmarkets.com/stock/RAPT/short-sales is what I use and the last report 2/28 indicates 362,000ish, frankly not very big compared to the volume traded.