It shouldn't be to fend off prospective suitors, but to ensure shareholders get the best outcome possible.
The problem is the senior management and board have a vested interest in stopping a take-over as most of them would be made redundant.
Not saying this is the case here, but some of the mergers and acquisitions I have been involved in (at a much smaller cap admittedly) are driven by ego and self interest, not maximising shareholder value.
DSH Price at posting:
$1.46 Sentiment: Buy Disclosure: Held