Revenue Recognition (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended	12 Months Ended
Jun. 30, 2011	Dec. 31, 2010
Revenue Recognition
Allowance for product returns	$ 0.8	$ 0.5
General sales returns terms, months	6
Sales returns terms prior to product expiration date, months	6
Sales returns terms after product expiration date, months	12
Allowance for rebates	$ 0.2	$ 0.3

The reduction to gross sales revenue attributable to price protection agreements with customers or clients which limit the sales price of goods or services including fixed dollar price or maximum (cap) price (per unit or total), an indexed maximum (cap) price within an agreed upon range of fluctuation, or any other mechanism agreed between the parties that limits the sale price or fees (per unit or total) to be paid for the goods sold or services rendered (such as rebates due to subsequent seller price decreases).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 926
-SubTopic 605
-Section 25
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-Paragraph 29
-URI http://asc.fasb.org/extlink&oid=6833236&loc=d3e57444-107978

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 985
-SubTopic 605
-Section 25
-URI http://asc.fasb.org/section&trid=2197888%26analyticsAssetName=subtopic_page_section%26nav_type=subtopic_page
-Paragraph 36
-Subparagraph d
-URI http://asc.fasb.org/extlink&oid=6753075&loc=d3e131949-111767

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Number AAG-REV
-Name Audit and Accounting Guide (AAG)
-IssueDate 2009-04-01
-Chapter 2
-Paragraph 8
-Footnote 5
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 AICPA
-Number AAG-REV
-Name Audit and Accounting Guide (AAG)
-IssueDate 2009-04-01
-Chapter 3
-Paragraph 34
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Number 00-2
-Name Statement of Position (SOP)
-Paragraph 25
-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