Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2013
Accounting Policies [Abstract]  
Schedule of earnings per share reconciliation
The following is a reconciliation of the basic and diluted net income (loss) per share computation: 
 
Year Ended December 31,
 
2013
 
2012
 
2011
Net (loss) income for basic EPS
$
(17,177,333
)
 
$
(14,059,539
)
 
$
29,099,579

Change in fair value of warrants
—

 
—

 
24,436,309

Net loss (income) for diluted EPS
$
(17,177,333
)
 
$
(14,059,539
)
 
$
4,663,270

Weighted-average shares: basic
52,368,842

 
51,639,622

 
50,929,491

Effect of potential common shares
—

 
—

 
3,132,159

Weighted-average shares: diluted
52,368,842

 
51,639,622

 
54,061,650

Earnings (loss) per share: basic
$
(0.33
)
 
$
(0.27
)
 
$
0.57

Earnings (loss) per share: diluted
$
(0.33
)
 
$
(0.27
)
 
$
0.09

Anti-dilutive employee share-based awards, excluded
—

 
—

 
504,668
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share
The Company incurred losses for the years ended December 31, 2013 and 2012 whereas for the year ended December 31, 2011, the Company had net income. For all periods presented, certain equity instruments are excluded from the calculation of diluted earnings (loss) per share as the effect of such shares is anti-dilutive. The weighted average number of equity instruments excluded consist of:
 
Year Ended December 31,
 
2013
 
2012
 
2011
Stock Options
2,725,632

 
2,865,861

 
504,668

Stock-Settled Stock Appreciation Rights
439,056

 
421,020

 
—

Restricted Stock Units
981,645

 
351,011

 
—

Warrants
1,802,820

 
2,263,538

 
—
Fair Value Measurements, Recurring and Nonrecurring
At December 31, 2013 and 2012, the fair value of such warrants was as follows:
 
 
2013
 
2012
Common stock warrants, current
 
$
313,425

 
$
333,793

Common stock warrants, non-current
 
—

 
657,246

 
 
$
313,425

 
$
991,039