Revenue Recognition - Additional Information (Detail)	3 Months Ended
Mar. 31, 2018 USD ($)
Disaggregation Of Revenue [Line Items]
Revenue from products and services transferred to customers, percentage	83.00%
Revenue from services transferred to customers over time, percentage	17.00%
Revenue recognized from contract liability	$ 502,000
Extended warranties recognized	648,000
Deferred royalties recognized	$ 3,000
Maximum
Disaggregation Of Revenue [Line Items]
Amortization period to expense incremental costs	1 year

Amortization period for expense incremental costs.

No definition available.

Name:	biol_AmortizationPeriodForExpenseIncrementalCosts
Namespace Prefix:	biol_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Contract with customer liability, revenue recognized, deferred royalties.

+ References

No definition available.

+ Details

Name:	biol_ContractWithCustomerLiabilityRevenueRecognizedDeferredRoyalties
Namespace Prefix:	biol_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Contract with customer liability, revenue recognized, extended warranty.

+ References

No definition available.

+ Details

Name:	biol_ContractWithCustomerLiabilityRevenueRecognizedExtendedWarranty
Namespace Prefix:	biol_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Contract with customer liability, revenue recognized, undelivered elements.

+ References

No definition available.

+ Details

Name:	biol_ContractWithCustomerLiabilityRevenueRecognizedUndeliveredElements
Namespace Prefix:	biol_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Revenue from products and services transferred to customers at a single point in time, percentage.

+ References

No definition available.

+ Details

Name:	biol_RevenueFromProductsAndServicesTransferredToCustomersPercentage
Namespace Prefix:	biol_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Revenue from services transferred to customers over time, percentage.

+ References

No definition available.

+ Details

Name:	biol_RevenueFromServicesTransferredToCustomersOverTimePercentage
Namespace Prefix:	biol_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DisaggregationOfRevenueLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: