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Shareholders' Equity (Tables)
 3 Months Ended
Mar. 31, 2016
Shareholders’ Equity [Abstract]  
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

The following table summarizes the activity for stock options and warrants for the three months ended March 31, 2016:

 
 
Stock Options
 
Warrants
 
 
Shares
 
Weighted Average Exercise Price
 
Weighted Average Remaining Contractual Term (Years)
 
Aggregate Intrinsic Value (In Thousands)
 
Shares
 
Weighted Average Exercise Price
 
Weighted Average Remaining Contractual Term (Years)
 
Aggregate Intrinsic Value (In Thousands)
Outstanding at December 31, 2015
 
6,663,480

 
$
6.46

 
6.88
 
$
0.1

 
3,214,033

 
$
13.72

 
1.26
 
$
—

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Changes during the period:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Granted
 
1,552,875

 
$
0.62

 
 
 
 
 
1,418,440

 
$
1.00

 
 
 
 
Exercised
 
—

 
$
—

 
 
 
 
 
—

 
$
—

 
 
 
 
Forfeited
 
(442,466
)
 
$
3.79

 
 
 
 
 
—

 
$
—

 
 
 
 
Expired
 
(545,097
)
 
$
5.07

 
 
 
 
 
(27,000
)
 
$
14.50

 
 
 
 
Outstanding at March 31, 2016
 
7,228,792

 
$
5.48

 
7.35
 
$
202.7

 
4,605,473

 
$
9.80

 
1.31
 
$
—

Vested at March 31, 2016 or expected to vest in the future
 
7,020,566

 
$
5.59

 
7.29
 
$
189.3

 
4,605,473

 
$
9.80

 
1.31
 
$
—

Vested at March 31, 2016
 
4,995,506

 
$
7.15

 
6.42
 
$
52.4

 
4,605,473

 
$
9.80

 
1.31
 
$
—
Restricted Stock [Table Text Block]
During the three months ended March 31, 2016 and 2015, the Company issued restricted stock for services as follows (in thousands, except share data):

 
 
Three Months Ended March 31,
  
 
2016
 
2015
Number of Restricted Stock Issued
 
983,828

 
818,004

Value of Restricted Stock Issued
 
$
562.8

 
$
2,955.8