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 September 30		Nine Months Ended September 30
	2014	2013	2014	2013
Weighted average number of shares outstanding:
Common stock	20,591,529	20,140,473	20,582,082	20,125,792
Common stock equivalents-stock options, grants	32,006	45,489	33,100	40,864
Diluted shares outstanding	20,623,535	20,185,962	20,615,182	20,166,656