Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash

-URI http://asc.fasb.org/extlink&oid=6506951

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash Equivalents

-URI http://asc.fasb.org/extlink&oid=6507016

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 8, 9

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

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-Subparagraph (SX 210.5-02.1)

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

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-Footnote 1

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 1

-Article 5

Reference 7: http://www.xbrl.org/2003/role/presentationRef

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-Paragraph 7, 26

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

Investment in short-term money-market instruments (such as commercial paper, banker's acceptances, repurchase agreements, government securities, certificates of deposit, and so forth) which are highly liquid (that is, readily convertible to known amounts of cash) and so near their maturity that they present an insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify as cash equivalents by definition. Original maturity means an original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

+ References+ Details

Basis of Presentation and Summary of Significant Accounting Policies (Details 7) (USD $)					6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2013 Sales Revenue, Net Revenue Concentration Risk AmerisourceBergen Drug Corporation.	Jun. 30, 2012 Sales Revenue, Net Revenue Concentration Risk AmerisourceBergen Drug Corporation.	Jun. 30, 2013 Sales Revenue, Net Revenue Concentration Risk McKesson Corporation	Jun. 30, 2012 Sales Revenue, Net Revenue Concentration Risk McKesson Corporation	Jun. 30, 2013 Sales Revenue, Net Revenue Concentration Risk Cardinal Health, Inc	Jun. 30, 2012 Sales Revenue, Net Revenue Concentration Risk Cardinal Health, Inc	Jun. 30, 2013 Sales Revenue, Net Revenue Concentration Risk Takeda Pharmaceutical Company Limited (outside the U.S.)	Jun. 30, 2012 Sales Revenue, Net Revenue Concentration Risk Takeda Pharmaceutical Company Limited (outside the U.S.)	Jun. 30, 2013 Sales Revenue, Net Revenue Concentration Risk GPO	Jun. 30, 2012 Sales Revenue, Net Revenue Concentration Risk GPO	Jun. 30, 2013 Sales Revenue, Net Geographical Concentration Risk	Jun. 30, 2012 Sales Revenue, Net Geographical Concentration Risk
Investment Concentration Risk
Cash, cash equivalents and investments	$ 212,400,000
Investment in institutional money market funds	19,900,000
Cash and cash equivalents	27,802,000	46,293,000	30,678,000	63,474,000
Amount invested in a single money market fund collateralized by U.S. treasury and government agency securities	$ 12,300,000
Customers representing 10% or more of revenues
Percentage of revenues from major customer					43.00%	30.00%	23.00%	14.00%	15.00%	10.00%	11.00%	40.00%	33.00%	32.00%
Percentage of revenues From customers outside of the U.S.
Approximate percentage of revenues from customers outside the U.S.															12.00%	40.00%