4. Acquisition

On June 21, 2013, the Company acquired 100% of the stock of a technology company. The fair value of the aggregate purchase price was approximately $259,000, which consisted of (1) a cash payment of $10,000, (2) notes payable of approximately $74,000, and (3) options to purchase shares of common stock with an exercise price of $11.28.  The estimated fair value of separately identifiable intangible assets will be amortized over an estimated useful life of two to three years. As a result, future amortization expense related to the acquisition will be $48,000, $96,000, $88,000, and $40,000 for the years ending December 31, 2013, 2014, 2015, and 2016, respectively.