At December 31, 2016 and 2015, the Company's deferred tax assets consisted primarily of net operating loss carry forwards acquired from American Exploration in the merger. For the years ended December 31, 2016 and 2015, the material reconciling items between the tax benefit computed at the statutory rate and the actual benefit recognized in the financial statements consisted of expenses related to share-based compensation and the change in the valuation allowance during the applicable period. At December 31, 2016 and 2015, the Company has recorded a 100% valuation allowance as management believes it is likely that any deferred tax assets will not be realized.
As of December 31, 2016, the Company had a net operating loss carry forward of approximately $33.3 million, which will expire between years 2028 and 2036. Due to the change in ownership provisions of the Tax Reform Act of 1986, our net operating loss carry forwards are expected to be subject to significant annual limitations for the change in ownership that resulted in the merger with American Exploration.