Net Income (Loss) Per Share (Tables)

6 Months Ended

Jun. 30, 2013

Summaries of weighted average number of shares outstanding

Diluted net income per share 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 stock options and vesting of stock grants per U.S. generally accepted accounting principles, or GAAP.



	Three Months Ended June 30		Six Months Ended June 30
	2013	2012	2013	2012
Weighted average number of shares outstanding:
Common stock	20,136,188	20,026,354	20,118,152	20,008,358
Common stock equivalents-stock options, grants	16,323	61,278	17,039	75,372
Diluted shares outstanding	20,152,511	20,087,632	20,135,191	20,083,730