Consolidated Statements Of Redeemable Preferred Stock And Shareholders' Equity (Parenthetical) $ in Thousands	12 Months Ended
Dec. 31, 2017 USD ($)
Convertible preferred stock and warrants, issuance cost	$ 251

Convertible preferred stock and warrants issuance cost.

No definition available.

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