STOCKHOLDERS' EQUITY: (Details 1) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Options, Grants	1,105,000	0	150,600
Number of Options, Exercised	92,040
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Options, Outstanding at Beginning of Year	4,300,000	4,630,000	4,811,000
Number of Options, Grants	1,105,000	0	151,000
Number of Options, Exercised	(92,000)	0	0
Number Of Option, Forfeited/cancelled/expired	(1,576,000)	(330,000)	(332,000)
Number of Options, Balance at End of Year	3,737,000	4,300,000	4,630,000	4,811,000
Number of Options, Vested and expected to vest at December 31, 2014	3,629,000
Number of Options, Unvested at December 31, 2014	1,105,000
Number of Options, Exercisable at December 31, 2014	2,632,000
Weighted-Average Exercise Price, Outstanding at Beginning of Year (in dollars per share)	$ 7.46	$ 8.17	$ 8.60
Weighted-Average Exercise Price, Grants (in dollars per share)	$ 2.75	$ 0	$ 0.83
Weighted-Average Exercise Price, Exercised (in dollars per share)	$ 1.36	$ 0	$ 0
Weighted-Average Exercise Price, Forfeited/cancelled/expired (in dollars per share)	$ 14.81	$ 17.43	$ 11.05
Weighted-Average Exercise Price, Balance at End of Year (in dollars per share)	$ 3.12	$ 7.46	$ 8.17	$ 8.60
Weighted-Average Exercise Price, Vested and expected to vest at December 31, 2014 (in dollars per share)	$ 3.13
Weighted-Average Exercise Price, Unvested at December 31, 2014 (in dollars per share)	$ 2.75
Weighted-Average Exercise Price, Exercisable at December 31, 2014 (in dollars per share)	$ 3.28
Weighted-Average Remaining Contractual Term, Outstanding at December 31, (in years)	5 years 2 months 5 days	0 years	0 years	0 years
Weighted-Average Remaining Contractual Term, Vested and expected to vest at December 31, 2014 (in years)	5 years 14 days
Weighted-Average Remaining Contractual Term, Unvested at December 31, 2014 (in years)	9 years 9 months 7 days
Weighted-Average Remaining Contractual Term, Exercisable at December 31, 2014 (in years)	3 years 3 months 4 days
Aggregate Intrinsic Value, Outstanding at Beginning of Year	$ 0	$ 0	$ 0
Aggregate Intrinsic Value, Balance at End of Year	629,440	0	0	0
Aggregate Intrinsic Value, Vested and expected to vest at December 31, 2014	629,440
Aggregate Intrinsic Value, Unvested at December 31, 2014	0
Aggregate Intrinsic Value, Exercisable at December 31, 2014	$ 629,440