BIOLASE, Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Debt - Additional Information (Detail)

Debt - Additional Information (Detail)					1 Months Ended			3 Months Ended		9 Months Ended
Debt - Additional Information (Detail)	Oct. 28, 2019 USD ($)	May 07, 2019 USD ($)	Nov. 09, 2018 USD ($) Day $ / shares shares	Sep. 27, 2018 USD ($) $ / shares	Mar. 31, 2020 USD ($) $ / shares	Nov. 30, 2019 $ / shares	Oct. 31, 2019 $ / shares	Mar. 31, 2020 USD ($) $ / shares	Mar. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Apr. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)	May 31, 2019 $ / shares	Mar. 06, 2018 USD ($) $ / shares
SWK Warrants
Debt Instrument [Line Items]
Warrants adjusted strike price \| $ / shares					$ 0.49	$ 1.00	$ 1.00
Initial exercise price of warrants \| $ / shares			$ 1.34
Warrants issued to purchase shares of common stock \| shares			372,023
Warrants expire date			Nov. 09, 2026
Number of trading days of average closing price of common stock \| Day			10
Warrants expiration period			8 years
Warrants fair value assumptions, expected volatility rate			81.79%
Warrants fair value assumptions annual dividend per share \| $ / shares			$ 0.00
Warrants fair value assumptions, risk-free interest rate			3.13%
Warrants, estimated fair value			$ 400,000
DPG Warrants
Debt Instrument [Line Items]
Finder's fee			$ 400,000
Initial exercise price of warrants \| $ / shares			$ 1.34
Warrants issued to purchase shares of common stock \| shares			279,851
Warrants expire date			Nov. 09, 2026
Number of trading days of average closing price of common stock \| Day			10
Warrants expiration period			8 years
Warrants fair value assumptions, expected volatility rate			81.79%
Warrants fair value assumptions annual dividend per share \| $ / shares			$ 0.00
Warrants fair value assumptions, risk-free interest rate			3.13%
Warrants, estimated fair value			$ 300,000
DPG Warrants \| Warrants Issued on November 9, 2018
Debt Instrument [Line Items]
Initial exercise price of warrants \| $ / shares			$ 1.34		0.8767			$ 0.8767
DPG Warrants \| Warrants Issued on May, 2019
Debt Instrument [Line Items]
Initial exercise price of warrants \| $ / shares					$ 1.4197			$ 1.4197					$ 2.17
Original Western Alliance Warrant
Debt Instrument [Line Items]
Initial exercise price of warrants \| $ / shares														$ 2.35
Western Alliance Warrant
Debt Instrument [Line Items]
Initial exercise price of warrants \| $ / shares				$ 2.13
Warrants expire date				Sep. 27, 2028
SWK Warrants and DPG Warrants
Debt Instrument [Line Items]
Warrants effective-interest method amortization period								5 years
Credit Agreement, First Amendment \| SWK Warrants
Debt Instrument [Line Items]
Additional warrants to purchase common stock value		$ 200,000
Credit Agreement, First Amendment \| DPG Warrants
Debt Instrument [Line Items]
Additional warrants to purchase common stock value		100,000
Additional finders fee		100,000
Maximum \| Original Western Alliance Warrant
Debt Instrument [Line Items]
Warrants issued to purchase shares of common stock equal value														$ 120,000
Maximum \| Western Alliance Warrant
Debt Instrument [Line Items]
Warrants issued to purchase shares of common stock equal value				$ 120,000
Pacific Mercantile Bank \| Subsequent Event
Debt Instrument [Line Items]
Line of credit, outstanding borrowings											$ 3,000,000
SWK Loan
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity									$ 12,500,000
Line of credit facility term			5 years
Borrowings under lines of credit			$ 12,500,000
Debt instrument, repayment of interest-only on loan period			2 years
Debt instrument, principal repayments beginning term			2021
Repayments of lines of credit			$ 700,000
Debt instrument, maturity term			2023
Debt instrument covenant description								(i) maintain unencumbered liquid assets of (A) no less than $1.5 million or (B) the sum of aggregate cash flow from operations less capital expenditures, (ii) achieve certain revenue and EBITDA levels during the first two years of the loan, (iii) limit future borrowing, investments and dividends, and (iv) submit monthly and quarterly financial reporting.
Debt issuance costs			$ 1,000,000
Loan origination fee			200,000
Finder's fee			400,000
Legal and other fees			$ 400,000
Interest expense								$ 600,000	$ 500,000
Weighted-average interest rate					12.25%			12.25%
SWK Loan \| LIBOR
Debt Instrument [Line Items]
Line of credit facility interest rate description								London Interbank Bank Offered Rate (“LIBOR”) plus 10% or another index that approximates LIBOR as close as possible if and when LIBOR no longer exists.
Line of credit facility bearing floating interest rate per annum			10.00%
SWK Loan \| Credit Agreement, First Amendment
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		15,000,000
Debt instrument covenant description								(a) adjust minimum revenue and EBITDA levels, (b) require the Company to have a shelf registration statement declared effective by the Securities and Exchange Commission before September 30, 2019, with a proposed maximum aggregate offering price of at least $10.0 million if the Company did not reach set minimum revenue levels for the three-month period ended September 30, 2019, and (c) require minimum liquidity of $1.5 million at all times. The First Amendment provided that if aggregate minimum revenue and EBITDA levels were not achieved by September 30, 2019, the minimum liquidity requirement would be increased to $3.0 million, until the Company has obtained additional equity or debt funding of no less than $5.0 million.
Minimum level of liquidity financial covenant		1,500,000
Additional equity or debt funding requirement until minimum liquidity is met		5,000,000										$ 5,000,000
Maximum aggregate offering price		10,000,000
Increase in minimum liquidity requirement if aggregate minimum revenue and EBITDA levels are not achieved		3,000,000
Financial covenant additional borrowings												2,500,000
Loan origination and other fees to be paid		$ 100,000
SWK Loan \| Credit Agreement, Second Amendment [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity										$ 5,000,000
SWK Loan \| Maximum
Debt Instrument [Line Items]
Debt instrument covenants unencumbered liquid assets			$ 1,500,000
SWK Loan \| Minimum \| Credit Agreement, Second Amendment [Member]
Debt Instrument [Line Items]
Gross proceeds from subordinated debt threshold limit										$ 5,000,000
Western Alliance \| Business Financing Agreement
Debt Instrument [Line Items]
Repayments of lines of credit			$ 900,000
Loan Agreement \| Pacific Mercantile Bank
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 3,000,000
Maximum borrowing base percentage of eligible accounts	90.00%
Maximum borrowing base percentage of eligible inventory	75.00%
Line of credit facility expiration date	Oct. 28, 2021
Interest rate	1.50%
Line of credit, outstanding borrowings					$ 0			$ 0				0
Line of credit facility, unused availability					$ 3,000,000			$ 3,000,000				$ 2,700,000
Loan Agreement \| Pacific Mercantile Bank \| Subsequent Event
Debt Instrument [Line Items]
Line of credit facility, current borrowing capacity											$ 3,000
Loan Agreement \| Pacific Mercantile Bank \| Maximum
Debt Instrument [Line Items]
Interest rate	6.00%
Loan Agreement \| Exim Bank
Debt Instrument [Line Items]
Line of credit facility expiration date	Oct. 28, 2020
Annual fee	$ 52,500
Termination fee	$ 30,000