Their accounting is pretty much "pure as the driven snow." They would not do kitchen sink accounting.
They did book a tax gain in the quarter. I'm guessing it was for a reserve booked as part of Nera acquisition so the corresponding expense had never been recorded. Frequently that is an indication of aggressive accounting, a practice one of their competitors has done. I'm not prepared to dump on Ceragon though as they did such a good job of highlighting the issue and pulling it out in non-GAAP disclosures.