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Stock Incentive Plans (Tables)
 12 Months Ended
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of activity of stock incentive and equity plans

   Shares
available
for grant		   Number of
options
outstanding		   Weighted-
average
option
exercise price		   Number of
restricted
stock shares
issued		   Number of
restricted
stock units
outstanding		 
Outstanding at January 1, 2016   73,227    285,157   $70.67    20,146    45,402 
Authorized   190,000                     
Granted   (153,769)   94,362    6.34    59,407    — 
Exercised/issued   —    —    —    —    (13,368)
Canceled/forfeited   133,760    (125,978)   89.63    (3,070)   (19,450)
Outstanding at December 31, 2016   243,218    253,541    37.31    76,483    12,584 
Granted   (85,071)   —    —    21,209    63,862 
Exercised/issued   —    (938)   6.10    —    (53,625)
Canceled/forfeited   116,347    (127,039)   51.85    —    (437)
Outstanding at December 31, 2017   274,494    125,564   $19.53    97,692    22,384 
Schedule of intrinsic value calculated based on grant date fair value

Date of grant  Number of
options
granted		   Exercise
price		   Intrinsic
value
per share		 
January – April 2016   5,112     $7.30 - $11.40    — 
September 2016   89,250   $6.10    — 
Schedule of exercise prices of outstanding options

Exercise price  Number of
options
outstanding		   Average
remaining
contractual life
(years)		   Number of
options
exercisable		 
$6.10 - $13.50   97,594    7.44    51,860 
$40.10 - $52.00   23,197    1.70    22,089 
$77.50 - $121.10   2,012    3.28    2,012 
$194.90 - $326.70   2,761    1.79    2,761 
    125,564    4.31    78,722 
Schedule of non-vested options
   Non-vested
options		   Weighted-
average option
exercise
price		 
Non-vested at January 1, 2016   125,196   $22.32 
Granted   94,362    6.34 
Vested   (33,011)   28.10 
Cancelled   (37,564)   25.10 
Non-vested at December 31, 2016   148,983    10.20 
Vested   (47,618)   12.89 
Cancelled   (54,523)   9.50 
Non-vested at December 31, 2017   46,842   $8.26 
Schedule of estimated fair value at the date of option grant using the Black-Scholes option-pricing model
   2016 
Weighted average fair value per option  $6.34 
Expected term   5.1 years 
Risk free interest rate   1.24% -1.73% 
Volatility   65%
Dividend yield   None 
Forfeiture rate   23.1%
Schedule of restricted stock units
Number of restricted stock units  Target price 
15,000  $6.50 
15,000  $8.00 
15,000  $9.50 
14,098  $11.00 
Schedule of fair value of restricted stock units
Daily expected stock price volatility   4.4237%
Daily expected mean return on equity   (0.2226%)
Daily expected dividend yield   0.0%
Average daily risk free interest rate   0.0063%
Restricted Stock [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary of restricted stock units

  

RSUs
outstanding

  

Weighted average
price at
time of grant

  

Aggregate intrinsic
value

 
Non-vested restricted stock units as of January 1, 2016        45,402   $19.18              
Vested   (13,368)      16.01      
Cancelled   (19,450)   23.45      
Non-vested restricted stock units as of December 31, 2016   12,584    16.00      
Granted   63,862    6.46      
Vested   (53,625)   9.41      
Cancelled   (437)   11.30      
Non-vested at December 31, 2017   22,384   $4.65   $178,553 
Restricted Stock Units (RSUs) [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary of restricted stock units
Non-vested restricted stock as of January 1, 2016   1,520 
Granted   59,407 
Vested   (41,387)
Cancelled/forfeited   (3,070)
      
Non-vested restricted stock as of December 31, 2016   16,470 
Granted   21,209 
Vested   (32,775)
      
Non-vested restricted stock as of December 31, 2017   4,904