Share-Based Compensation

6 Months Ended

Jun. 30, 2018

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

Share-Based Compensation

(8) Share-Based Compensation

We follow FASB ASC Topic 718, Compensation – Stock Compensation, in which compensation expense is recognized only for share-based payments expected to vest. We recognized compensation expense related to stock options of $43 and $88 for the three and six months ended June 30, 2018, respectively, compared to $46 and $94 for the three and six months ended June 30, 2017, respectively.

As of June 30, 2018, there was approximately $523 of total unrecognized compensation cost related to non-vested share-based compensation arrangements granted under our stock option plans. That cost is expected to be recognized over a remaining weighted-average period of 2.4 years.

Stock Options and Stock Grants

No stock options were exercised during the six months ended June 30, 2018. During the six months ended June 30, 2017, 4,334 shares of common stock were issued pursuant to stock option exercises for proceeds of $2. During the six months ended June 30, 2018, 570,500 stock options were granted compared to 507,600 stock options granted during the same period in 2017. During the six months ended June 30, 2018, 188,504 stock options expired, and no stock options were forfeited compared to 12,568 stock options forfeited and 7,000 stock options expiring during the same period in 2017. We had 3,523,000 stock options outstanding at a weighted average exercise price of $0.66 on June 30, 2018, compared to 3,141,000 stock options outstanding at a weighted average exercise price of $0.73 on December 31, 2017.

The following table illustrates the various assumptions used to calculate the Black-Scholes option pricing model for stock options granted during the periods presented:

For the three months ended	June 30, 2018			June 30, 2017
Weighted-average risk-free interest rates:		2.9	%		—
Dividend yield:		—			—
Weighted-average expected life of the option:		7 years			—
Weighted-average expected stock price volatility:		94	%		—
Weighted-average fair value of the options granted:	$	0.66			—

For the six months ended	June 30, 2018			June 30, 2017
Weighted-average risk-free interest rates:		2.9	%		2.1	%
Dividend yield:		—			—
Weighted-average expected life of the option:		7 years			7 years
Weighted-average expected stock price volatility:		94	%		94	%
Weighted-average fair value of the options granted:	$	0.64		$	0.55

As of June 30, 2018, we did not have any unvested restricted stock or performance shares outstanding.