I'll look for my copy of Tony's excellent book, Flying Wings and Radical Things" later this evening since my wife has been on a boxing spree ahead of our upcoming move. I'm definitely seeing quite a bit of Scaled Composites influence.
Pure speculation, but could this possibly be a Tacit Blue follow-on of some sort, designed for higher altitudes and perhaps a different customer/requirements set (such as AEW as SteveO mentioned}? The inlets are....odd, but otherwise this strongly resembles a "Son of BSAX" if such a thing ever existed.