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12. STOCK-BASED COMPENSATION (Details - Outstanding options and warrants) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Outstanding Options and Warrants [Member]
  
Shares Outstanding, beginning balance 6,231,250
Shares granted 80,000
Shares exercised 0
Shares canceled or expired (1,610,000)
Shares outstanding, ending blance 4,701,250
Exercisable, ending balance 4,309,583
Weighted average exercise price, beginning balance $ 3.58
Weighted average exercise price, granted $ 2.04
Weighted average exercise price, exercised   
Weighted average exercise price, cancelled or expired $ 4.77
Weighted average exercise price, ending balance $ 3.15
Weighted average exercise price, exercisable $ 3.18
Weighted average remaining contractual life, ending balance 1 year 4 months 24 days
Weighted average remaining contractual life, exercisable 1 year 3 months 7 days
Aggregate intrinsic value, ending balance $ 25,025
Aggregate intrinsic value, exercisable $ 25,025
Non-Plan Outstanding Warrants [Member]
  
Shares Outstanding, beginning balance 1,502,898
Shares granted 0
Shares exercised (1,172,898)
Shares canceled or expired (130,000)
Shares outstanding, ending blance 200,000
Exercisable, ending balance 200,000
Weighted average exercise price, beginning balance $ 1.50
Weighted average exercise price, granted   
Weighted average exercise price, exercised $ 1.12
Weighted average exercise price, cancelled or expired $ 3.25
Weighted average exercise price, ending balance $ 2.62
Weighted average exercise price, exercisable $ 2.62
Weighted average remaining contractual life, ending balance 1 year 11 months 1 day
Weighted average remaining contractual life, exercisable 1 year 11 months 1 day