My understanding is that there's a 12-month bar on release unless they're recognized as refugees within that time period. The thing about it is that we live in a country where we respect liberty. You don't detain people if there's not a need to detain. If you know who they are, you know they're not a risk, they're making a refugee claim, and there are bond signers, why on earth would you detain them except to punish? That's not the purpose of it.
On April 30th, 2012. See this statement in context.