Note 4 - Stock-based Compensation

3 Months Ended

Mar. 31, 2018

Notes to Financial Statements

Disclosure of Compensation Related Costs, Share-based Payments [Text Block]

4.

    Stock-

based Compensation

– At

March 31, 2018,

we have

three

stock-based compensation plans in effect. We record compensation cost related to unvested stock awards by recognizing the unamortized grant date fair value on a straight line basis over the vesting periods of each award. We have estimated forfeiture rates based on our historical experience. Stock option compensation expense for the

three

month periods ended

March 31, 2018

and

2017

has been recognized as a component of general and administrative expenses in the accompanying Consolidated Financial Statements. We recorded

$13,000

of stock-based compensation expense in both quarters ended

March 31, 2018

and

2017.

As of

March 31, 2018,

there is

$64,000

of unrecognized compensation cost related to stock options.

No

options were granted during the

three

months ended

March 31, 2018.

The following table summarizes options as of

March 31, 2018:

	# of Shares		Wgt Avg Exercise Price		Wgt Avg Remaining Contractual Life in Years		Aggregate Intrinsic Value
Outstanding at March 31, 2018		243,500	$	2.17		4.7	$	716,655
Vested and exercisable at March 31, 2018		206,500	$	1.87		4.0	$	669,565

The estimated fair value of options granted is calculated using the Black-Scholes option pricing model with assumptions as previously disclosed in our

2017

Form

10

-K.

The aggregate intrinsic value in the table above represents the total pre-tax intrinsic value (the difference between the company’s closing stock price on the last trading day of the

first

quarter of

2018

and the exercise price, multiplied by the number of in-the-money options) that would have been received by the option holders had all option holders exercised their options on

March 31, 2018.

The amount of aggregate intrinsic value will change based on the market value of the company’s stock.