Organization and Summary of Significant Accounting Policies, Fair Value Disclosures (Details) (Recurring [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Fair Value Hierarchy [Roll Forward]
Money market funds	$ 9,859	$ 11,771
Certificates of deposits	3,595	4,256
Commercial paper	2,996sprt_CommercialPaperFairValueDisclosure	7,298sprt_CommercialPaperFairValueDisclosure
Corporate notes and bonds	45,771sprt_CorporateBondsFairValueDisclosure	33,372sprt_CorporateBondsFairValueDisclosure
U.S. government agency securities	2,000
Total	64,221	56,697
Level 1 [Member]
Fair Value Hierarchy [Roll Forward]
Money market funds	9,859	11,771
Certificates of deposits	0	4,256
Commercial paper	0	0
Corporate notes and bonds	0	0
U.S. government agency securities	0
Total	9,859	16,027
Level 2 [Member]
Fair Value Hierarchy [Roll Forward]
Money market funds	0	0
Certificates of deposits	3,595	0
Commercial paper	2,996	7,298
Corporate notes and bonds	45,771	33,372
U.S. government agency securities	2,000
Total	54,362	40,670
Level 3 [Member]
Fair Value Hierarchy [Roll Forward]
Money market funds	0	0
Certificates of deposits	0	0
Commercial paper	0	0
Corporate notes and bonds	0	0
U.S. government agency securities	0
Total	$ 0	$ 0

Fair value portion of cash equivalents and short-term investments.

No definition available.

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The fair value disclosure of certificates of deposit as of the balance sheet.

No definition available.

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The fair value disclosure of commercial paper as of the balance sheet.

No definition available.

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The fair value disclosure of corporate notes and bonds as of the balance sheet.

No definition available.

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The fair value disclosure of money market funds as of the balance sheet.

No definition available.

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The fair value disclosure of U.S. Government Agency Securities as of the balance sheet.

No definition available.

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