I reckon he'll be sentenced to about 18 months, and he won't even serve a full year in gaol.
Here's a case of a bookkeeper who defrauded his employer of $130,000 (or 4 times the amount Thompson stole) and he effectively got a $2000 fine.
Thompson will get a harsher sentence because he went to trial and has shown no remorse, but I doubt he'll serve 12 months.
Thompson stole more than just a few thousand...$6000 on prostitutes, $70,000 on meals and travel and $100,000 on cash advances. Then have a look at the $200,000.00 or so he used to bankroll his run at parliament! The only thing that makes all of this palatable is the fact it was Union money and not taxpayer money