Diluted net income per share attributable to common stockholders is based upon the weighted-average number of shares of common stock outstanding and the weighted-average number of shares outstanding assuming the issuance of common stock upon exercise of warrants to purchase common stock, and the vesting of restricted stock grants per ASC 260, “Earnings Per Share.”



	Three Months Ended March 31
	2015	2014
Weighted average number of shares outstanding:
Common stock	20,645,846	20,568,270
Common stock equivalents-stock options, grants	60,737	38,218
Diluted shares outstanding	20,706,583	20,606,488