Casino operator Imperial Pacific International Holdings has set a new record for VIP turnover at its temporary casino on the island of Saipan.

In a statement released to the Hong Kong Stock Exchange this week, Imperial Pacific announced that the temporary casino operated by its Best Sunshine International subsidiary had enjoyed VIP turnover totaling $3.95b in the month of September.

The company offered no details on what may have caused the surge, which represented a 153% rise over August’s $1.56b, the second lowest VIP turnover total recorded since the temporary casino opened last October. September’s total also smashed the property’s previous high-water mark of $3.2b in April.

Imperial Pacific’s permanent Saipan venue, the Imperial Pacific Resort, is scheduled to open in early 2017. On Monday, Imperial Pacific CEO Mark Brown offered government representatives of the Commonwealth of the Northern Mariana Islands (CNMI) an update on the permanent casino’s progress.