Read the coverage section of your renter/condo/homeowners insurance policy and that of your company's insurance policy. Examine these very carefully for coverage on theft and accidental damage.
In many cases, adding a computer-only insurance policy for a computer is simply an additional unwarranted expense because of overlapping coverage.
You will have to look at the deductible amount and assess the risk in having your device stolen or damaged.
If it is a company issued device and your employer explicitly allows you to take the device off premise, most likely it will be covered by the company's policy, wouldn't be affected by your personal coverage. Any theft would be filed against your company's policy, not yours. For further information, please consult with your IT department.