STOCKHOLDERS' EQUITY: (Details) (USD $)	6 Months Ended
	Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Options, Outstanding at December 31, 2013	4,300,000
Number of Options, Grants	0
Number of Options, Exercised	92,000
Number Of Option, Forfeited/cancelled/expired	25,000
Number of Options, Balance as of June 30, 2014	4,183,000
Number of Options, Vested and expected to vest at June 30, 2014	4,183,000
Number of Options, Unvested at June 30, 2014	0
Number of Options, Exercisable at June 30, 2014	4,183,000
Weighted-Average Exercise Price, Outstanding at December 31, 2013	$ 7.46
Weighted-Average Exercise Price, Grants	$ 0
Weighted-Average Exercise Price, Exercised	$ 1.36
Weighted-Average Exercise Price, Forfeited/cancelled/expired	$ 16.92
Weighted-Average Exercise Price, Balance as of June 30, 2014	$ 7.54
Weighted-Average Exercise Price, Vested and expected to vest at June 30, 2014	$ 7.54
Weighted-Average Exercise Price, Unvested at June 30, 2014	$ 0
Weighted-Average Exercise Price, Exercisable at June 30, 2014	$ 7.54
Weighted-Average Remaining Contractual Term, Outstanding at June 30, 2014 (in years)	2 years 4 months 28 days
Weighted-Average Remaining Contractual Term, Vested and expected to vest at June 30, 2014 (in years)	2 years 4 months 28 days
Weighted-Average Remaining Contractual Term, Unvested at June 30, 2014 (in years)	0 years
Weighted-Average Remaining Contractual Term, Exercisable at June 30, 2014 (in years)	2 years 4 months 28 days
Aggregate Intrinsic Value, Outstanding at December 31, 2013	$ 0
Aggregate Intrinsic Value, Balance as of June 30, 2014	7,574,683
Aggregate Intrinsic Value, Vested and expected to vest at June 30, 2014	7,574,683
Aggregate Intrinsic Value, Unvested at June 30, 2014	0
Aggregate Intrinsic Value, Exercisable at June 30, 2014	$ 7,574,683