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6. STOCK-BASED COMPENSATION (Details Narrative) (USD $) In Thousands, except Share data, unless otherwise specified | 6 Months Ended
--- | ---
Jun. 30, 2014 | Jun. 30, 2013
Total intrinsic value of options and warrants | $ 5,900 | $ 2,300
Total unrecognized stock-based compensation expense related to non-vested employee awards | 82,310 |
Expected period of recognition over a weighted average period | 1 year 7 months 6 days |
2006 Plan |  |
Common stock reserved for issuance | 11,000,000 |
Stock options outstanding | 2,272,167 |
Stock options vested | 2,062,167 |
Options, warrants and RSU's outstanding | 5,003,952 |
Options, warrants and RSU's exercised | 2,141,583 |
Options, warrants and RSU's available for grant | 3,854,465 |
RestrictedStockMember |  |
Total unrecognized stock-based compensation expense related to non-vested employee awards | $ 1,300 |
RestrictedStockMember |  |
Expected period of recognition over a weighted average period | 2 years 9 months |
Restricted stock awards granted | 1,011,785 |

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