Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2017

Schedule of Weighted Average Number of Shares

The following table presents a reconciliation of our weighted average number of Class A and Class B common shares used to compute net income (loss) per share (in thousands):



	Three Months Ended September 30,		Nine Months Ended September 30,
	2017	2016	2017	2016
Weighted average shares outstanding	33,923	33,668	33,848	33,617
Less: Weighted average unvested restricted shares subject to repurchase	18	68	31	88
Weighted average common shares outstanding; basic	33,905	33,600	33,817	33,529

Weighted average common shares outstanding; basic	33,905	33,600	33,817	33,529
Plus: Weighted average options, RSUs and restricted shares used to compute diluted net income per share	1,300	—	1,274	—
Weighted average common shares outstanding; diluted	35,205	33,600	35,091	33,529

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The following table presents the number of anti-dilutive common shares excluded from the calculation of weighted average number of shares used to compute diluted net income (loss) per share for the three and nine months ended September 30, 2017 and 2016 (in thousands):



	Three Months Ended September 30,		Nine Months Ended September 30,
	2017	2016	2017	2016
Options to purchase common stock	—	1,764	—	1,764
Unvested restricted stock awards	—	59	—	59
Unvested restricted stock units	13	480	13	480
Contingent restricted stock units⁽¹⁾	6	27	6	27
Total shares excluded from net income (loss) per common share	19	2,330	19	2,330

⁽¹⁾ Included in the anti-dilutive shares above are fixed price restricted stock unit (“RSU”) commitments for which the number of shares has not been determined at the grant date. The number of RSU shares with a fixed price included in the table above are 6,000 and 27,000 shares at September 30, 2017 and 2016, respectively. The number of shares have been determined by dividing the fixed price commitment to issue shares in the future by the closing price of our stock as of the applicable reporting period date.