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Note 7 - Stock-based Compensation
3 Months Ended
Mar. 31, 2020
Notes to Financial Statements  
Share-based Payment Arrangement [Text Block]
7.
STOCK-BASED COMPENSATION
 
In
May 2013,
the Company established the
2013
Stock Option Plan for which
396,835
shares of common stock are reserved and
101,500
shares are available for future grants as of
March 31, 2020
. The
2013
Plan requires that the option price
may
not
be less than the fair market value of the stock at the date the option is granted, and that the stock must be paid in full at the time the option is exercised. Payment in full for the option price must be made in cash, with Company common stock previously acquired by the optionee and held by the optionee for a period of at least
nine
months, in options of the Optionee that are fully vested and exercisable or in any combination of the foregoing. The options expire on dates determined by the Board of Directors, but
not
later than
ten
years from the date of grant.
 
During the
three
months ended
March 31, 2019
the Company granted options to purchase
5,000
shares of common stock. 
No
options were granted during the
three
months ended
March 31, 2019.
 
The fair value of each option was estimated on the date of grant using the following assumptions. 
 
   
2020
 
Expected life of stock options (in years)
   
5.1
 
Risk free interest rate
   
1.68
%
Daily Volatility
   
26.0
%
Dividend yields
   
1.29
%
Weighted-average fair value of options granted during the three months ended March 31, 2020
  $
5.92
 
 
The Company determines the fair value of options on the date of grant using a Black-Scholes-Merton option pricing model that uses assumptions based on expected option life, expected stock volatility and the risk-free interest rate. The expected volatility assumptions used by the Company are based on the historical volatility of the Company’s common stock over the most recent period commensurate with the estimated expected life of the Company’s stock options. The Company bases its expected life assumption on its historical experience and on the terms and conditions of the stock options it grants to employees. The risk-free rate is based on the U.S. Treasury yield curve for the periods within the contractual life of the options in effect at the time of the grant.
 
A summary of the activity within the
2013
Plan follows: 
   
Shares
   
Weighted Average Exercise Price
   
Weighted Average Remaining Contractual Term in Years
   
Intrinsic Value
 
Options outstanding at January 1, 2020
   
302,385
    $
17.73
     
 
     
 
 
Options granted
   
5,000
    $
26.42
     
 
     
 
 
Options exercised
   
(12,050
)    
6.68
     
 
     
 
 
Options outstanding at March 31, 2020
   
295,335
    $
18.33
     
6.0
    $
899,000
 
Options exercisable at March 31, 2020
   
122,785
    $
12.89
     
4.2
    $
899,000
 
Expected to vest after March 31, 2020
   
152,897
    $
22.20
     
7.2
    $
-
 
 
As of
March 31, 2020
, there was
$768,000
of total unrecognized compensation cost related to non-vested, share-based compensation. That cost is expected to be recognized over a weighted average period of
3.2
years.
 
The total fair value of options vested during the
three
months ended
March 31, 2020
and
2019
was
$189,000
and
$197,000,
respectively. The total intrinsic value of options at time of exercise was
$235,000
and
$251,000
for the
three
months ended
March 31, 2020
and
2019
, respectively.
 
Compensation cost related to stock options recognized in operating results under the stock option plans was
$78,000
and
$50,000
for the
three
months ended
March 31, 2020
and
2019
, respectively. The associated income tax benefit recognized was
$6,000
and
$3,000
for the
three
months ended
March 31, 2020
and
March 31, 2019
, respectively.
 
Cash received from option exercises under the plans for the
three
months ended
March 31, 2020
and
2019
were
$35,000
and
76,000,
respectively. The tax benefit realized for the tax deductions from option exercise totaled
$10,000
and
$0
for the
three
months ended
March 31, 2020
and
2019
, respectively.