For the Years Ended December 31,

2013

2012

2011

Basic and diluted net loss per share

Numerator:

Loss from continuing operations

$

3,785,701

$

12,714,951

$

8,182,323

Loss on disposal of discontinued operations

—

1,798

Preferred stock cash dividends

—

192,848

385,696

Numerator for basic and diluted earnings per share – Net loss attributable to common stockholders

$

3,785,701

$

12,907,799

$

8,569,817

Denominator:

Weighted average basic and diluted shares outstanding

33,725,317

32,710,018

31,953,683

Basic and diluted net loss per share:

Loss from continuing operations

$

0.11

$

0.38

$

0.26

Loss on disposal of discontinued operations

—

0.00

Preferred stock cash dividends

—

0.01

Net loss attributable to common stockholders

$

0.11

$

0.39

$

0.27