We typically enter into contractual agency relationships with health insurance carriers that are non-exclusive and terminable on short notice by either party for any reason. In addition, health insurance carriers often have the ability to terminate or amend our agreements unilaterally on short notice, including provisions in our agreements relating to our commission rates. The amendment or termination of an agreement we have with a health insurance carrier may adversely impact the commissions we are paid on health insurance plans that we have already sold through the carrier. See Critical Accounting Policies and Estimates for details regarding our recognition of commission revenue.
2015 compared to 2014-Commission revenue increased $12.6 million, or 8%, in the year ended December 31, 2015 compared to the year ended December 31, 2014, primarily due to a $22.0 million increase in Medicare-related commission revenue, partially offset by a $9.4 million decrease in non-Medicare plan commission revenue, consisting primarily of individual and family health insurance commission revenue. The increase in Medicare related commission revenue is due to increased Medicare membership for the year ended December 31, 2015 compared to the year ended December 31, 2014. The decrease in non-Medicare plan related commission revenue is primarily due to decreased individual and family plan estimated membership for the year ended December 31, 2015 compared to the year ended December 31, 2014.
We expect other income (expense), net to be flat in 2016 compared to 2015.
2014 compared to 2013-In 2014, we recorded a provision for income taxes of $9.3 million compared to a provision of $1.9 million in 2013 due primarily to valuation allowance adjustments in 2014.
2014-Net cash used in investing activities of $8.1 million during the year ended December 31, 2014 was due to $3.6 million used to purchase property and equipment and $4.5 million used in the purchase of an intangible asset, the Internet domain name www.Medicare.com. Additional non-cash consideration for www.Medicare.com included settlement of a $0.3 million outstanding receivable from the owner upon completion of the purchase.
In February 2016, the Financial Accounting Standard Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-2 (ASU 2016-2) "Leases (Topic 842)." ASU 2016-2 requires lessees to put leases on their balance sheets but
Stock Plans-On June 12, 2014, upon approval at the Annual Meeting of Stockholders, we adopted the 2014 Equity Incentive Plan (the “2014 Plan”). The 2014 Plan replaced the 2006 Equity Incentive Plan and 4,500,000 shares were authorized for issuance under the 2014 Plan. The 2014 Plan does not include an evergreen provision to automatically increase the number of shares available under it and increases in the number of shares authorized for issuance under the 2014 Plan require stockholder approval. Also, under the 2014 Plan the following shares are not recycled for future grant under the 2014 Plan: (i) shares used in connection with the exercise of an option and/or stock appreciation right to pay the exercise price or purchase price of such award or satisfy applicable tax withholding obligations; and (ii) the gross number of shares subject to stock appreciation rights that are exercised. Furthermore, the 2014 Plan included a provision that prohibits repricing of outstanding
Stock repurchase activity under our stock repurchase programs during the year ended December 31, 2013, 2014 and 2015 is summarized as follows (dollars in thousands, except share and per share amounts):