Property, Plant, and Equipment - Additional Information (Detail) (USD $)	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012
Property, Plant, and Equipment Disclosure [Line Items]
Depreciation and amortization of property, plant and equipment	$ 99,000	$ 92,000

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the property, plant, and equipment assets.

No definition available.

Name:	biol_DepreciationDepletionAndAmortizationOfPropertyPlantAndEquipment
Namespace Prefix:	biol_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration