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Note 6 - Stock Option Plan
6 Months Ended
Jun. 30, 2018
Notes to Financial Statements  
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]
6.
       Stock Option Plan
 
On
May 20, 2009,
the Company adopted the
2009
Equity Incentive Plan (the Plan). The Plan provides for the award of stock options, restricted stock, performance shares and stock appreciation rights. The aggregate number of shares of the Company’s common stock available for issuance under the Plan
may
not
exceed
223,000
shares.
 
At
June 30, 2018,
184,000
shares of the Company’s common stock were available for issuance under the Plan. The Company
may
grant both non-statutory and statutory stock options which
may
not
have a term exceeding
ten
years. In the case of incentive stock options, the aggregate fair value of the stock (determined at the time the incentive stock option is granted) for which any optionee
may
be granted incentive options which are
first
exercisable during any calendar year shall
not
exceed
$100,000.
Option prices
may
not
be less than the fair market value of the underlying stock at the date of the grant. An award of a performance share is a grant of a right to receive shares of the Company’s common stock which is contingent upon the achievement of specific performance criteria or other objectives set at the grant date. Stock appreciation rights are equity or cash settled share-based compensation arrangements whereby the number of shares that will ultimately be issued or the cash payment is based upon the appreciation of the Company’s common stock. Awards granted under the Plan
may
be granted either alone, in addition to, or in tandem with, any other award granted under the Plan. The terms of the Plan also include provisions whereby all unearned options and restricted shares become immediately exercisable and fully vested upon a change in control.
 
The fair market value of stock options granted is estimated at the date of grant using an option pricing model. Expected volatilities are based on historical volatility of the Company's stock. The expected term of options granted represents the period of time that options are expected to be outstanding and is based on historical trends. The risk free rate for the expected life of the options is based on the U.S. Treasury yield curve in effect at the time of grant. As of
June 30, 2018,
no
stock options had been granted under the Plan.
 
On
February 20, 2018,
the Company granted
20,000
restricted stock shares to directors, officers and key employees at a grant-date price of
$37.42
per share for a total of
$748,000.
The restricted stock vests ratably from the grant date through
July 1, 2023,
with
20%
of the shares vesting each year on
July 1
beginning
July 1, 2019.
On
February 17, 2015,
the Company granted
19,500
restricted stock shares to directors, officers and key employees at a grant-date price of
$24.50
per share for a total of
$478,000
with a similar vesting schedule from
July 1, 2016
through
July 1, 2020.
Compensation expense is measured based on the fair market value of the restricted stock at the grant date and is recognized ratably over the period during which the shares are earned (the vesting period). Compensation expense related to restricted stock recognized for the
three
-month and
six
-month periods ended
June 30, 2018
amounted to
$57,000
and
$106,000,
respectively. Compensation expense related to restricted stock recognized for the
three
-month and
six
-month periods ended
June 30, 2017
amounted to
$22,000
and
$43,000,
respectively.
 
A summary of the Company’s nonvested restricted shares under the Plan as of
June 30, 2018
and changes during the
six
-month period then ended is presented below.
 
    Number
of
Shares
  Weighted
Average
Grant Date
Fair Value
Nonvested at January 1, 2018    
10,500
    $
24.50
 
Granted    
20,000
    $
37.42
 
Vested    
800
    $
32.58
 
Forfeited    
-
     
-
 
Nonvested at June 30, 2018    
29,700
    $
32.98
 
 
There were
800
restricted shares that vested during the
six
-month period ended
June 30, 2018,
upon the retirement of a director. The total fair value of restricted shares that vested during the
six
-month period ended
June 30, 2018
was
$29,000.
At
June 30, 2018,
there was
$854,000
of total unrecognized compensation expense related to nonvested restricted shares. The compensation expense is expected to be recognized over the remaining vesting period of
5.0
years.