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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Weighted Average Assumptions Used to Value Options Granted
The Company used the Black-Scholes option-pricing model with the following weighted-average assumptions to value options granted in 2013 and 2012:
 
2013
 
2012
Dividend yield
—%
 
—%
Expected volatility
77.2%
 
85.0%
Risk-free interest rate
1.1%
 
1.4%
Expected option lives
6 years
 
6 years
Schedule of Option Activity Under All Plans
The following table presents the activity related to options under all plans for the years ended December 31, 2013, 2012, and 2011.
 
2013
 
2012
 
2011
 
Options outstanding
 
Weighted-average exercise price
 
Options outstanding
 
Weighted-average exercise price
 
Options outstanding
 
Weighted-average exercise price
Balance at beginning of year
139,446

 
$
53.66

 
144,370

 
$
68.90

 
156,522

 
$
68.26

Granted
5,507

 
6.80

 
32,399

 
4.77

 
—

 
—

Exercised/Released
(5,250
)
 
5.70

 
—

 
—

 
—

 
—

Cancelled / forfeited
(17,326
)
 
124.87

 
(29,213
)
 
71.78

 
(5,715
)
 
74.78

Expired
(10,806
)
 
90.72

 
(8,110
)
 
68.97

 
(6,437
)
 
48.00

Balance at end of year
111,571

 
$
38.92

 
139,446

 
$
53.66

 
144,370

 
$
68.90

Exercisable at end of year
73,665

 
 
 
50,997

 
 
 
73,345

 
 
Schedule of Weighted Average Exercise Price and Weighted Average Remaining Contractual Life of Options
Information regarding the number, weighted-average exercise price, and weighted-average remaining contractual life of options by range of exercise price at December 31, 2013 is as follows:
 
Options outstanding
 
Exercisable options
Exercise price range
Number of options
 
Weighted-average exercise price
 
Weighted-average remaining contractual life (years)
 
Number of options
 
Weighted-average exercise price
Under $50.00
85,756

 
$
5.81

 
7.2
 
47,850

 
$
5.71

$50.01 - $80.00
—

 
—

 
n/a
 
—

 
—

$80.01 - $120.00
12,200

 
101.30

 
4.2
 
12,200

 
101.30

$120.01 - $160.00
6,882

 
136.86

 
0.4
 
6,882

 
136.86

$160.01 - $220.00
2,362

 
207.50

 
2.1
 
2,362

 
207.50

$220.01 - $279.00
4,371

 
269.01

 
3.1
 
4,371

 
269.01

 
111,571

 
$
38.92

 
6.2
 
73,665

 
$
55.89
Schedule of Nonvested Restricted Stock Activity
The following table presents the activity for nonvested restricted stock for the year ended December 31, 2013:
 
Number of
shares
 
Weighted-
average grant
date fair value
per share
Nonvested as of January 1, 2013
157,191

 
$
14.11

Granted
262,325

 
5.82

Exercised / Released
(49,416
)
 
6.12

Canceled / forfeited
(15,830
)
 
6.73

Nonvested as of December 31, 2013
354,270

 
$
9.41