8. NET LOSS PER SHARE ATTRIBUTABLE TO COMMON STOCK

Net loss per share attributable to common stock is calculated using the two-class method. The two-class method is an allocation method of calculating loss per share when a company’s capital structure includes participating securities that have rights to undistributed earnings. The Company’s employees and officers that hold unvested restricted stock are entitled to receive dividends declared by the Company.

The Company’s basic net loss per share attributable to common stock is computed by reducing the Company’s net loss by the net income allocable to unvested restricted stockholders that have a right to participate in earnings. The Company’s employees and officers that hold unvested restricted stock do not participate in losses because they are not contractually obligated to do so. The undistributed earnings are allocated based on the relative percentage of the weighted average unvested restricted stock awards. The basic net loss per share attributable to common stock is computed by dividing the net loss attributable to common stock by the weighted average shares outstanding. The weighted average shares outstanding for the three months ended September 30, 2015 was calculated by weighting the share activity for the Company by the number of days the shares were outstanding in the quarter. The weighted average number of shares outstanding for the nine months ended September 30, 2015 was calculated by totaling (i) the product of (x) the weighted shares of Legacy Dawson Common Stock outstanding at the beginning of the period multiplied by (y) the Exchange Ratio, plus (ii) the number of shares associated with awards of Legacy Dawson restricted stock and restricted stock units that vested in conjunction with the Merger, weighted as of February 11, 2015, plus (iii) the number of shares of Legacy TGC Common Stock outstanding immediately prior to the Merger, weighted to reflect that such shares were outstanding from February 11, 2015 until the end of the period. The weighted average number of shares outstanding for the three and nine months ended September 30, 2014 was calculated as if the change of Legacy Dawson’s fiscal year end from September 30 to December 31 had occurred at the beginning of the period in calendar 2014 and the components of the weighted average shares calculation were multiplied by the Exchange Ratio. The Company’s dilutive net loss per share attributable to common stock is computed by adjusting basic net loss per share attributable to common stock by diluted income allocable to unvested restricted stock, if any, divided by weighted average diluted shares outstanding. A reconciliation of the basic and diluted loss per share attributable to common stock is as follows:

Net Loss per Share Attributable to Common Stock

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2015			2014			2015			2014
	(in 000’s)						(in 000’s)
Net loss	$	(2,870	)	$	(3,882	)	$	(21,339	)	$	(9,723	)
Income allocable to unvested restricted stock	—			(15		)	—			(44		)

Basic loss attributable to common stock	$	(2,870	)	$	(3,897	)	$	(21,339	)	$	(9,767	)

Reallocation of participating earnings	—			—			—			—

Diluted loss attributable to common stock	$	(2,870	)	$	(3,897	)	$	(21,339	)	$	(9,767	)

Weighted average common shares outstanding:
Basic	21,571,513			14,011,789			20,386,202			14,010,557
Dilutive common stock options and restricted stock units	—			—			—			—

Diluted	21,571,513			14,011,789			20,386,202			14,010,557

Basic loss attributable to a share of common stock	$	(0.13	)	$	(0.28	)	$	(1.05	)	$	(0.70	)

Diluted loss attributable to a share of common stock	$	(0.13	)	$	(0.28	)	$	(1.05	)	$	(0.70	)

The Company had a net loss in each of the three and nine months ended September 30, 2015 and 2014. As a result, all stock options and restricted stock units were anti-dilutive and excluded from weighted average shares used in determining the diluted loss attributable to a share of common stock for the respective periods. The following weighted average numbers of stock options and restricted stock units have been excluded from the calculation of diluted loss per share attributable to common stock, as their effect would be anti-dilutive for each of the three and nine months ended September 30, 2015 and 2014:

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2015	2014	2015	2014
Stock options	158,732	161,275	159,860	161,884
Restricted stock units	129,247	38,555	125,702	39,486

Total	287,979	199,830	285,562	201,370

There was no unvested restricted stock included in common stock outstanding at September 30, 2015. There were 182,160 shares of unvested restricted stock at September 30, 2014 included in common stock outstanding as such shares had a non-forfeitable right to participate in any dividends that might be declared and have the right to vote.