6. SHARE-BASED COMPENSATION

6 Months Ended

Jun. 30, 2015

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

SHARE-BASED COMPENSATION

We have a share-based compensation plan, the “2003 Directors, Officers and Consultants Stock Option, Stock Warrant and Stock Award Plan” (the “Plan”). Awards of common stock and options to purchase common stock granted under the Plan have vesting periods of three years and options are exercisable for two years once fully vested. Share-based compensation expense related to awards is based on the fair value at the date of grant, and is recognized over the requisite expected service period, net of estimated forfeitures. Under the Plan, the maximum number of shares issued pursuant to options is 15 percent of issued and outstanding common shares.

Summary of Nonvested Shares of Restricted Stock

For the six months ended June 30, 2015 and 2014, we recognized a total of $253 and $366, respectively, of share-based compensation expense related to restricted stock awards, which is included in selling, general and administrative expenses in the accompanying unaudited condensed consolidated statements of operations. The unamortized estimated fair value of the 263 nonvested shares of restricted stock was $491 at June 30, 2015. These costs are expected to be recognized as expense over a weighted average period of 1.00 years.

Summary of Stock Options

For the six months ended June 30, 2015 and 2014, we recognized a total of $0 and $69, respectively, of share-based compensation expense related to outstanding stock option awards, which is included in selling, general and administrative expenses in the accompanying unaudited condensed consolidated statements of operations. The unamortized portion of the estimated fair value of non-vested stock options was $0 at June 30, 2015.