Diluted net income (loss) 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 June 30		Six Months Ended June 30
	2014	2013	2014	2013
Weighted average number of shares outstanding:
Common stock	20,586,190	20,136,188	20,577,280	20,118,152
Common stock equivalents-stock options, grants	35,406	16,323	40,323	17,039
Diluted shares outstanding	20,621,596	20,152,511	20,617,603	20,135,191