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Stockholders' Equity and Employee Stock Option Plans (Tables)
 12 Months Ended
Dec. 31, 2016
Equity [Abstract]  
Schedule Of Share Based Compensation Stock Options, RSU and SARS Activity [Table Text Block]
The following table summarizes stock award activity under all plans for the years ended December 31, 2016, 2015, and 2014:
 
 
 
 
Options Outstanding 
 
 
Shares Available for Grant 

 
Number Outstanding
 
Weighted-Average Exercise Price Per Share
BALANCE AT DECEMBER 31, 2013
 
457,585

 
410,484

 
$
41.30

Options granted
 
(46,800
)
 
46,800

 
24.60

RSUs granted
 
(219,153
)
 
—

 
—

Options and stock appreciation rights cancelled
 
197,066

 
(197,066
)
 
47.00

RSUs cancelled
 
126,519

 
—

 
—

Options exercised
 
—

 
(539
)
 
31.70

BALANCE AT DECEMBER 31, 2014
 
515,217

 
259,679

 
$
34.00

Options granted
 
(112,600
)
 
112,600

 
9.14

RSUs granted
 
(83,555
)
 
—

 
—

Options and stock appreciation rights cancelled
 
86,743

 
(86,743
)
 
32.38

RSUs cancelled
 
111,700

 
—

 
—

BALANCE AT DECEMBER 31, 2015
 
517,505

 
285,536

 
$
24.72

New plan shares approved
 
750,000

 
—

 
—

Unissued shares eliminated from plan
 
(13,346
)
 
—

 
—

Options granted
 
(275,250
)
 
275,250

 
5.07

RSUs granted
 
(460,209
)
 
—

 
—

Options and stock appreciation rights cancelled
 
54,914

 
(54,914
)
 
25.50

RSUs cancelled
 
29,211

 
—

 
—

BALANCE AT DECEMBER 31, 2016
 
602,825

 
505,872

 
$
13.94


The total intrinsic value of options and SARs exercised during the years ended December 31, 2016, 2015, and 2014, was approximately $0, $0, and $3,000, respectively. During the years ended December 31, 2016, and 2015, no options or SARs were exercised. The intrinsic value is calculated as the difference between the market value on the date of exercise and the exercise price of the shares.
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]
The following table provides additional information regarding RSU and RSA activity for the years ended December 31, 2016, 2015, and 2014:
 
 
Number of Shares Nonvested and Outstanding
 
Weighted-Average Grant Date Fair-Value
BALANCE AT DECEMBER 31, 2013
 
136,711

 
$
52.20

RSUs and RSAs granted
 
128,945

 
25.03

RSUs vested and released
 
(50,022
)
 
57.84

RSUs cancelled
 
(86,312
)
 
36.88

BALANCE AT DECEMBER 31, 2014
 
129,322

 
$
33.15

RSUs granted
 
49,150

 
9.03

RSUs vested and released
 
(40,414
)
 
35.32

RSUs cancelled
 
(73,344
)
 
32.29

BALANCE AT DECEMBER 31, 2015
 
64,714

 
$
14.45

RSUs granted
 
307,770

 
5.21

RSUs vested and released
 
(23,993
)
 
14.31

RSUs cancelled
 
(17,328
)
 
17.06

BALANCE AT DECEMBER 31, 2016
 
331,163

 
$
5.74


The fair value of each RSU and RSA granted to employees was estimated on the date of grant by multiplying the number of shares granted times the fair market value of the Company's stock on the grant date.

The total intrinsic value of RSUs and RSAs vested and released during the years ended December 31, 2016, 2015, and 2014 was approximately $118,000, $379,000, and $1.2 million, respectively. The intrinsic value of vested and released RSUs and RSAs is calculated by multiplying the fair market value of the Company's stock on the vesting date by the number of shares vested. As of December 31, 2016, the number of RSUs and RSAs outstanding and expected to vest was 331,163, with a total intrinsic value of $1.6 million. The intrinsic value of the outstanding and expected to vest RSUs and RSAs is calculated based on the market value of the Company's closing stock price of $4.70 as of December 30, 2016, the last market trading day of 2016.
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]
The following table provides additional information for significant ranges of outstanding and exercisable stock options and SARs as of December 31, 2016:

Exercise
Price Range
 
Number
Outstanding
 
Weighted
Average
Remaining
Contractual Life
(in years)
 
 Weighted
Average
Exercise
Price per Share
 
 
Aggregate Intrinsic Value
$4.51-$4.73
 
80,000

 
9.37
 
$
4.68

 
$
3,800

5.22
 
187,000

 
9.74
 
5.22

 
—

5.45-9.11
 
87,750

 
8.50
 
8.70

 
—

9.15-23.70
 
84,490

 
7.06
 
21.26

 
—

24.20-35.20
 
41,632

 
5.03
 
30.72

 
—

$74.60
 
25,000

 
0.63
 
74.60

 
—

Outstanding
 
505,872

 
8.18
 
$
13.94

 
$
3,800

Vested and expected to vest
 
483,234

 
8.18
 
$
14.29

 
$
3,800

Exercisable
 
200,830

 
6.45
 
$
24.70

 
$
3,800