12. STOCK OPTIONS AND WARRANTS

3 Months Ended

Mar. 31, 2019

Share-based Payment Arrangement [Abstract]

STOCK OPTIONS AND WARRANTS

12. STOCK OPTIONS AND WARRANTS

Stock Options

There were no stock options issued during the three months ended March 31, 2019.

During the three months ended March 31, 2019, the Company recorded stock option-based compensation of $2,301 related to prior grants. As of March 31, 2019, there is $4,337 of unrecognized stock option based compensation expense that will be recognized over the next nine months.

Warrants

There were no warrants issued during the three months ended March 31, 2019, while 2,133 warrants expired during the three months ended March 31, 2019.