Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Awards and Per Share Information - Additional Information (Detail)

v2.4.1.9
Stock-Based Awards and Per Share Information - Additional Information (Detail) (USD $)
 1 Months Ended 3 Months Ended 0 Months Ended
Feb. 28, 2014
Mar. 31, 2015
Mar. 31, 2014
Nov. 07, 2014
Mar. 09, 2015
Dec. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Common stock issued pursuant to options exercised   38,000us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised        
Compensation cost related to stock options   $ 700,000us-gaap_AllocatedShareBasedCompensationExpense $ 310,000us-gaap_AllocatedShareBasedCompensationExpense      
Net impact of share based compensation expense to earnings per basic share   $ (0.01)biol_ShareBasedCompensationNetImpactOnEarningPerShareBasic $ (0.01)biol_ShareBasedCompensationNetImpactOnEarningPerShareBasic      
Net impact of share based compensation expense to earnings per diluted share   $ (0.01)biol_ShareBasedCompensationNetImpactOnEarningPerShareDiluted $ (0.01)biol_ShareBasedCompensationNetImpactOnEarningPerShareDiluted      
Total unrecognized compensation cost   $ 5,000,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized        
Unrecognized share based compensation cost to be recognized over weighted-average period   3 years 4 months 24 days        
Granted   2,232,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod        
Expected term   7 years 2 months 12 days 3 years 7 months 6 days      
Volatility   89.90%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate 98.37%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate      
Risk-free interest rate   1.78%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate 1.65%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate      
Outstanding stock options and warrants excluded from diluted loss per share   15,563,000us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 5,998,000us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount      
Annual Stock Dividend Payable Rate 0.50%biol_PercentageOfStockDividendsPayable          
Dividends Payable, Date of Record Mar. 14, 2014          
Private Placement            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Outstanding stock options and warrants included in connection with November 2014       9,206,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember 		   
CFO Grant Award Tranche One            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Granted         523,026us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_VestingAxis
= biol_ChiefFinancialOfficerGrantAwardTrancheOneMember 		 
Share based compensation arrangement by share Based payment award fair value price         $ 1.48biol_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValuePrice
/ us-gaap_VestingAxis
= biol_ChiefFinancialOfficerGrantAwardTrancheOneMember 		 
Expected term         6 years 1 month 6 days  
Volatility         88.79%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_VestingAxis
= biol_ChiefFinancialOfficerGrantAwardTrancheOneMember 		 
Risk-free interest rate         1.83%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_VestingAxis
= biol_ChiefFinancialOfficerGrantAwardTrancheOneMember 		 
CFO Grant Award Tranche Two            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Share based compensation arrangement by share Based payment award fair value price         $ 1.70biol_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValuePrice
/ us-gaap_VestingAxis
= biol_ChiefFinancialOfficerGrantAwardTrancheTwoMember 		 
Expected term         10 years  
Volatility         87.87%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_VestingAxis
= biol_ChiefFinancialOfficerGrantAwardTrancheTwoMember 		 
Risk-free interest rate         2.19%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_VestingAxis
= biol_ChiefFinancialOfficerGrantAwardTrancheTwoMember 		 
Warrants            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Restricted stock units outstanding   888,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember 		      888,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
Warrants exercised   0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember 		0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember 		     
Restricted Stock Units (RSUs)            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Restricted stock units outstanding   37,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember 		       
Non Qualified Stock Options | Chief Financial Officer            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Granted         871,710us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= biol_NonQualifiedStockOptionsMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefFinancialOfficerMember 		 
Exercise Price of Stock Options         $ 1.99biol_ExercisePriceOfStockOptions
/ us-gaap_AwardTypeAxis
= biol_NonQualifiedStockOptionsMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefFinancialOfficerMember 		 
Options expiration period         10 years  
One Year Anniversary | CFO Grant Award Tranche One            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Option shares vested and exercised         130,757us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber
/ us-gaap_AwardTypeAxis
= biol_OneYearAnniversaryMember
/ us-gaap_VestingAxis
= biol_ChiefFinancialOfficerGrantAwardTrancheOneMember 		 
Shares vested and exercised consecutive term         35 months  
Shares vested and exercisable date         Mar. 09, 2016  
One Month Anniversary | CFO Grant Award Tranche One            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Option shares vested and exercised         10,896us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber
/ us-gaap_AwardTypeAxis
= biol_OneMonthAnniversaryMember
/ us-gaap_VestingAxis
= biol_ChiefFinancialOfficerGrantAwardTrancheOneMember 		 
Thirty Six Month Anniversary | CFO Grant Award Tranche One            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Option shares vested and exercised         10,909us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber
/ us-gaap_AwardTypeAxis
= biol_ThirtySixMonthAnniversaryMember
/ us-gaap_VestingAxis
= biol_ChiefFinancialOfficerGrantAwardTrancheOneMember 		 
Shares vested and exercisable date         Mar. 09, 2019  
Ten Year Anniversary | CFO Grant Award Tranche Two            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Granted         348,684us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= biol_TenYearAnniversaryMember
/ us-gaap_VestingAxis
= biol_ChiefFinancialOfficerGrantAwardTrancheTwoMember 		 
Shares vested and exercisable date         Mar. 09, 2025  
2002 Stock Incentive Plan            
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]            
Plan expiration date   May 05, 2019        
Common stock authorized for issuance under the 2002 Plan   9,250,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= biol_TwoThousandTwoStockIncentivePlanMember 		       
Common stock issued pursuant to options exercised   3,031,000us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_PlanNameAxis
= biol_TwoThousandTwoStockIncentivePlanMember 		       
Options and restricted stock units outstanding   5,469,000biol_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndRestrictedStockUnitsOutstandingNumber
/ us-gaap_PlanNameAxis
= biol_TwoThousandTwoStockIncentivePlanMember 		       
Options available for future grants   750,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= biol_TwoThousandTwoStockIncentivePlanMember