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 June 30,		Six Months Ended June 30,
	2016	2015	2016	2015
Weighted average number of shares outstanding:
Common stock	20,724,689	20,660,797	20,713,396	20,653,363
Common stock equivalents-stock options, grants	115,693	69,701	103,664	64,554
Diluted shares outstanding	20,840,382	20,730,498	20,817,060	20,717,917