How are open market stock calls reflected on a Form 1065 balance sheet?

I have an LLC (which is treated as a partnership) that is required to include a balance sheet on the Form 1065.  How are unexpired call options reflected on the balance sheet?  Call premium may be received in cash in one year, but that cash will not be treated as income until the following year when the option is exercised or the call expires. What entry is made to offset the cash on the balance sheet?