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Stockholders' Equity and Stock-based Compensation (Tables)
 12 Months Ended
Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Transactions Under the Stock Option Plans
Transactions under the stock option plans are summarized as follows:
 
Option Price
per Share
 
Outstanding
 
Vested
 
Available
for Grant
January 1, 2014
$42.45-$245.85

 
550,567

 
305,698

 
334,762

Plan Expiration
—

 
—

 
—

 
(4,452
)
Granted
37.05-62.55

 
115,760

 
—

 
(115,760
)
Vested
—

 
—

 
92,750

 
—

Exercised
45

 
(1,900
)
 
(1,900
)
 
—

Cancelled/forfeited
45.00-231.45

 
(65,358
)
 
(38,158
)
 
14,453

Restricted stock granted out of option plans
—

 
—

 
—

 
(48,503
)
Restricted stock forfeited or cancelled for employee minimum income taxes and returned to the plans
—

 
—

 
—

 
2,968

December 31, 2014
37.05-245.85

 
599,069

 
358,390

 
183,468

Granted
34.2

 
53,328

 
—

 
(53,328
)
Vested
—

 
—

 
79,779

 
—

Exercised
—

 
—

 
—

 
—

Cancelled/forfeited
37.05-231.45

 
(91,600
)
 
(53,864
)
 
12,358

Restricted stock granted out of option plans
—

 
—

 
—

 
(45,652
)
Restricted stock forfeited or cancelled for employee minimum income taxes and returned to the plans
—

 
—

 
—

 
157

December 31, 2015
34.20-245.85

 
560,797

 
384,305

 
97,003

Increase in shares authorized
—

 
—

 
—

 
1,150,940

Granted
3.1

 
415,000

 
—

 
(415,000
)
Vested
—

 
—

 
67,480

 
—

Exercised
—

 
—

 
—

 
—

Cancelled/forfeited
3.1-245.85

 
(128,162
)
 
(103,432
)
 
18,895

Restricted stock granted out of option plans
—

 
—

 
—

 
(259,300
)
Restricted stock forfeited or cancelled for employee minimum income taxes and returned to the plans
—

 
—

 
—

 
7,182

December 31, 2016
$3.1-$245.85

 
847,635

 
348,353

 
599,720
Summary of Stock Options Outstanding
Stock options outstanding at December 31, 2016 are summarized as follows:

Option Price per Share
Outstanding
 
Weighted Average Exercise Price of Outstanding Options
 
Weighted Average Remaining Contract Life
 
Vested
 
Weighted Average Exercise Price of Vested Options
$3.10 - $57.90
557,438

 
$
15.00

 
6.9 years
 
94,050

 
$
50.09

$61.05 - $71.85
79,230

 
$
62.12

 
6.7 years
 
45,154

 
$
62.88

$81.60 - $99.60
119,296

 
$
88.73

 
5.5 years
 
117,478

 
$
88.61

$106.05 - $245.85
91,671

 
$
166.89

 
3.1 years
 
91,671

 
$
166.89

Totals
847,635

 
$
46.21

 
6.1 years
 
348,353

 
$
95.48
Additional Information Related to the Company's Stock Options
Additional information related to the Company’s stock options follows:
 
Number of Shares
 
Weighted Average Exercise Price
 
Weighted Average Grant Date Fair Value
 
Weighted Average Remaining Contractual Life
 
Aggregate Intrinsic Value (000’s)
Total outstanding at January 1, 2016
560,797

 
$
89.74

 
 
 
6.0 years
 
 
Options granted
415,000

 
$
3.10

 
$
2.04

 
 
 
 
Options exercised
—

 
$
—

 
 
 
 
 
 
Options cancelled
(24,730
)
 
$
37.68

 
 
 
 
 
 
Options forfeited
(103,432
)
 
$
111.34

 
 
 
 
 
 
Total outstanding at December 31, 2016
847,635

 
$
46.21

 
 
 
6.1 years
 
$
1,175

Options exercisable and vested at December 31, 2016
348,353

 
$
95.48

 
 
 
5.8 years
 
$
—
Status of the Company's Restricted Stock and Restricted Stock Unit Awards
The status of the Company’s restricted stock and restricted stock unit awards for 2016 follows:
 
Number of 
Shares/Units
Total nonvested at January 1, 2016
73,627

Granted
259,300

Vested
(40,421
)
Forfeited
(7,198
)
Total nonvested at December 31, 2016
285,308
Schedule of Valuation Assumptions
 
December 31, 2016
Risk-free interest rates
1.81%
Expected lives (in years)
4.0
Expected dividend yield
—%
Expected volatility
70.99%
Pursuant to ASC 718, “Compensation – Stock Compensation,” the stock appreciation rights are considered liability awards and as such, these amounts are accrued in the liability section of the balance sheet. The Company calculated the fair value of each SAR award on the date of grant using a Monte Carlo simulation model. The following assumptions were used:
 
December 31, 2015
Risk-free interest rates
2.19%
Expected lives (in years)
3.3
Expected dividend yield
—%
Expected volatility
69.38%
The Company calculated the fair value of each stock option on the date of grant using the Black-Scholes option pricing model. The following assumptions were used for each respective period:
 
Years Ended December 31,
 
2016
 
2015
 
2014
Risk-free interest rates
1.3%
 
1.38%
 
1.6% – 1.7%
Expected lives (in years)
5.5
 
4.5
 
5.5
Expected dividend yield
—%
 
—%
 
—%
Expected volatility
78.76%
 
59.32%
 
65.9% – 70.5%
Summary of Stock-based Compensation Expense
The following table summarizes stock-based compensation expense for the years ended December 31, 2016, 2015 and 2014 as follows (in thousands):
 
Years Ended December 31,
 
2016
 
2015
 
2014
Stock-based compensation expense
$
3,267

 
$
5,486

 
$
8,707

Tax benefit related thereto
(1,168
)
 
(1,826
)
 
(2,908
)
Stock-based compensation expense, net of tax
$
2,099

 
$
3,660

 
$
5,799