I cannot tell with certainty why the DEF 14A is delayed but I can see, based on the historical record, that the only times when the DEF 14A was delayed was to address and include voting issues that they needed shareholder votes on; such as the business makeover and proxy battle.
Given the time and expense necessary to file a DEF 14A with the SEC, it would seem reasonable that Kanders would want to have " the deal " language and terms included so that the shareholders can vote on it. That does, of course, require some special event. Other then that, going back to 2004, each DEF 14A was filed by NLT May 2. In an ordinary year this should be pretty straight forward proxies; vote for the BOD, appoint a certain CPA or auditor and that is pretty much it. Sometimes they throw in a change to the executive salary plan.
The bottom line, there is really only one logical reason for the DEF 14A filing delays; the BOD and management needs more time ... but why ?