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Stock-Based Compensation - (Tables)
 12 Months Ended
Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Stock Option Activity
Stock option activity is summarized as follows:
 
Options
 
Weighted
Average
Exercise
Price
 
Weighted
Average
Remaining
Contractual
Term
(in years)
 
Aggregate
Intrinsic
Value
(thousands)
Outstanding at December 31, 2015
256,963

 
$
20.01

 
7.7

 
—

Granted
875,000

 
$
2.24

 
—

 
—

Cancelled
(24,500
)
 
$
8.47

 
—

 
—

Vested shares expired
(34,175
)
 
$
36.68

 
—

 
$
—

Outstanding at December 31, 2016
1,073,288

 
$
5.26

 
9.4

 
$
5,500

Exercisable at December 31, 2016
471,374

 
$
8.82

 
8.8

 
$
2,750
Schedule of Weighted-Average Grant Date Fair Value
The weighted-average assumptions and grant date fair value for the options granted during year ended December 31, 2016 were as follows:
 
Years Ended December 31,
 
2016
 
2015
Expected volatility
153.7% - 168.5%

 
126.0
%
Risk-free interest rate
1.19% - 2.18%

 
1.7
%
Dividend yield
—

 
—

Expected life in years
6.0

 
5.4

Weighted average grant date fair value
$
2.12

 
$
7.60
Schedule of Restricted Stock Unit Activity
RSU activity is as follows:
 
Shares
 
Weighted
Average Grant
Date Fair Value
Nonvested at December 31, 2015
39,405

 
$
12.55

Granted
5,789

 
$
2.64

Vested
(28,806
)
 
$
11.38

Forfeited
(3,999
)
 
$
13.05

Nonvested units at December 31, 2016
12,389

 
$
10.50