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ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012
Numerator: |  |  |  |
Net loss attributable to common stockholders | $ (13,221) | $ (13,064) | $ (45,541) | $ (49,638)
Denominator: |  |  |  |
Denominator for basic net loss per share - weighted average outstanding shares (in shares) | 47,443,031 | 50,019,048 | 48,680,979 | 50,010,406
Effect of dilutive securities: |  |  |  |
Stock options and restricted stock (in shares) | 0 | 0 | 0 | 0
Denominator for diluted net loss per share - weighted-average outstanding shares (in shares) | 47,443,031 | 50,019,048 | 48,680,979 | 50,010,406
Net loss attributable to common stockholders per share - basic (in dollars per share) | $ (0.28) | $ (0.26) | $ (0.95) | $ (0.99)
Net loss attributable to common stockholders per share - diluted (in dollars per share) | $ (0.28) | $ (0.26) | $ (0.95) | $ (0.99)

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