8. STOCK OPTION PLANS (Details 2) (USD $)	Dec. 31, 2012
Number of options outstanding and expected to vest	7,791
Weighted-average remaining contractual life	8 years 2 months 24 days
Weighted-average exercise price	$ 5.79
Options vested and exercisable
Number of options exercisable	3,494
Options Exercisable, Weighted-average exercise price	$ 6.80
$0 to $1.00
Number of options outstanding and expected to vest	9
Weighted-average remaining contractual life	6 years 3 months 17 days
Weighted-average exercise price	$ 0.85
Options vested and exercisable
Number of options exercisable	7
Options Exercisable, Weighted-average exercise price	$ 0.85
$1.01 to $2.00
Number of options outstanding and expected to vest	79
Weighted-average remaining contractual life	6 years 5 months 20 days
Weighted-average exercise price	$ 1.78
Options vested and exercisable
Number of options exercisable	74
Options Exercisable, Weighted-average exercise price	$ 1.76
$2.01 to $3.00
Number of options outstanding and expected to vest	1,353
Weighted-average remaining contractual life	5 years 10 months 28 days
Weighted-average exercise price	$ 2.66
Options vested and exercisable
Number of options exercisable	1,075
Options Exercisable, Weighted-average exercise price	$ 2.61
$3.01 to $4.00
Number of options outstanding and expected to vest	1,764
Weighted-average remaining contractual life	7 years 10 months 25 days
Weighted-average exercise price	$ 3.5
Options vested and exercisable
Number of options exercisable	1,229
Options Exercisable, Weighted-average exercise price	$ 3.52
$4.01 to $5.00
Number of options outstanding and expected to vest	310
Weighted-average remaining contractual life	8 years 11 months
Weighted-average exercise price	$ 4.79
Options vested and exercisable
Number of options exercisable	87
Options Exercisable, Weighted-average exercise price	$ 4.71
$5.01 to $6.00
Number of options outstanding and expected to vest	3,884
Weighted-average remaining contractual life	9 years 1 month 29 days
Weighted-average exercise price	$ 5.27
Options vested and exercisable
Number of options exercisable	899
Options Exercisable, Weighted-average exercise price	$ 5.18
$6.01 to $7.00
Number of options outstanding and expected to vest	278
Weighted-average remaining contractual life	9 years 2 months 2 days
Weighted-average exercise price	$ 6.48
Options vested and exercisable
Number of options exercisable	66
Options Exercisable, Weighted-average exercise price	$ 6.5
$7.01 to $8.00
Number of options outstanding and expected to vest	70
Weighted-average remaining contractual life	9 years 1 month 2 days
Weighted-average exercise price	$ 7.75
Options vested and exercisable
Number of options exercisable	14
Options Exercisable, Weighted-average exercise price	$ 7.75
$8.01 to $965
Number of options outstanding and expected to vest	44
Weighted-average remaining contractual life	2 years 8 months 25 days
Weighted-average exercise price	$ 249.43
Options vested and exercisable
Number of options exercisable	43
Options Exercisable, Weighted-average exercise price	$ 249.43