Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2013

Accounting Policies [Abstract]

Schedule by Geographic Areas

The Company’s revenue by geography (based on customer address) is as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2012		2013		2012		2013
Revenues:
United States	$	21,887,000	$	26,695,000	$	43,084,000	$	51,483,000
United Kingdom		3,087,000		3,643,000		6,095,000		7,105,000
International - all other		8,823,000		10,332,000		17,306,000		19,518,000
Total revenue	$	33,797,000	$	40,670,000	$	66,485,000	$	78,106,000

Schedule of Options to Purchase Common Shares and Restricted Stock Units

The Company excluded the following options to purchase common shares and restricted stock units from the computation of diluted net income (loss) per share either because they had an anti-dilutive impact or because the Company had a net loss in the period:

	Three Months Ended June 30,				Six Months Ended June 30,
	2012		2013		2012		2013
Options to purchase common shares		1,587,310		2,946,607		1,586,910		2,946,607
Restricted stock units		141,837		1,134,804		940		1,134,804
Total options and restricted stock units		1,729,147		4,081,411		1,587,850		4,081,411

Reconciliation of Basic and Diluted Net Income per Share

Basic and diluted net income per share was calculated as follows:

	Three Months Ended June 30, 2012		Six Months Ended June 30, 2012
Basic:
Net income	$	575,677	$	651,917
Weighted average common shares outstanding, basic		24,677,893		24,625,851
Net income, basic	$	0.02	$	0.03
Diluted:
Net income	$	575,677	$	651,917
Weighted average common shares outstanding		24,677,893		24,625,851
Add: Options to purchase common shares		689,334		735,099
Weighted average common shares outstanding, diluted		25,367,227		25,360,950
Net income, diluted	$	0.02	$	0.03

	Three Months Ended June 30, 2013			Six Months Ended June 30, 2013
Basic and diluted net loss per share:
Net loss	$	(1,359,941	)	$	(7,166,596	)
Weighted average common shares outstanding		24,262,417			24,485,429
Basic and diluted net loss per share	$	(0.06	)	$	(0.29	)