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7. Stockholders' Equity (Details) | 12 Months Ended
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Dec. 31, 2012
Common Class A [Member] |
Class of Stock [Line Items] |
Voting Rights, Number of Vote Entitled Per Share | 0.1
Election Percentage for Board of Directors | 25.00%
Common Class B [Member] |
Class of Stock [Line Items] |
Voting Rights, Number of Vote Entitled Per Share | 1
Election Percentage for Board of Directors | 75.00%

X
- Definition Election Percentage for Board of Directors + References No definition available. + Details
Name: | bio_ElectionPercentageForBoardOfDirectors
Namespace Prefix: | bio_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Voting Rights, Number of Vote Entitled Per Share + References No definition available. + Details
Name: | bio_VotingRightsNumberOfVoteEntitledPerShare
Namespace Prefix: | bio_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ClassOfStockLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration