10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2019

or

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

Commission File Number: 001-36385

BIOLASE, INC.

(Exact name of registrant as specified in its charter)

Delaware	87-0442441
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

4 Cromwell

Irvine, California 92618

(Address of principal executive offices) (Zip code)

(949) 361-1200

(Registrant’s telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ☒    No  ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    Yes  ☒    No  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☐	Accelerated filer	☐
Non-accelerated filer	☒	Smaller reporting company	☒
		Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act.):    Yes  ☐    No  ☒

Securities registered pursuant to Section 12(b) of the Act

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common stock at par value $0.001 per share	BIOL	The NASDAQ Stock Market LLC (NASDAQ Capital Market)

As of August 7, 2019, the registrant had 21,866,197 shares of common stock, $0.001 par value per share, outstanding.

BIOLASE, INC.

INDEX

		Page
PART I.	FINANCIAL INFORMATION
Item 1.	Financial Statements (Unaudited):	3
	Consolidated Balance Sheets as of June 30, 2019 and December 31, 2018	3
	Consolidated Statements of Operations and Comprehensive Loss for the three and six months ended June 30, 2019 and June 30, 2018	4
	Consolidated Statements of Stockholders’ Equity for the three and six months ended June 30, 2019 and June 30, 2018	5
	Consolidated Statements of Cash Flows for the six months ended June 30, 2019 and June 30, 2018	6
	Notes to Consolidated Financial Statements	7
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	25
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	36
Item 4.	Controls and Procedures	36
PART II	OTHER INFORMATION	36
Item 1.	Legal Proceedings	36
Item 1A.	Risk Factors	36
Item 6.	Exhibits	37
Signatures		39

2

PART I. FINANCIAL INFORMATION

ITEM  1. FINANCIAL STATEMENTS

BIOLASE, INC.

CONSOLIDATED BALANCE SHEETS

(in thousands, except share and per share data)

	June 30,			December 31,
	2019			2018
	(unaudited)			(unaudited)
ASSETS
Current assets:
Cash and cash equivalents	$	3,720		$	8,044
Restricted cash		312			312
Accounts receivable, less allowance of $952 and $850 in 2019 and 2018,    respectively		9,740			11,112
Inventory		12,334			12,248
Prepaid expenses and other current assets		952			1,591
Total current assets		27,058			33,307
Property, plant, and equipment, net		1,585			1,975
Goodwill		2,926			2,926
Other assets		793			308
Total assets	$	32,362		$	38,516
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
Accounts payable		5,878			5,953
Accrued liabilities		4,899			7,538
Deferred revenue, current portion		2,513			2,476
Total current liabilities		13,290			15,967
Deferred income taxes, net		72			77
Warranty accrual		735			447
Other liabilities		1,145			100
Term loan		13,328			10,836
Total liabilities		28,570			27,427
Commitments and contingencies — Note 11
Stockholders' equity:
Preferred stock, par value $0.001 per share; 1,000 shares authorized; 0    shares issued and outstanding as of June 30, 2019 and December 31,    2018, respectively		—			—
Common stock, par value $0.001 per share; 40,000 shares authorized,    21,866 and 21,072 shares issued and outstanding as of June 30, 2019    and December 31, 2018, respectively		22			21
Additional paid-in-capital		229,972			228,430
Accumulated other comprehensive loss		(711	)		(670	)
Accumulated deficit		(225,491	)		(216,692	)
Total stockholders' equity		3,792			11,089
Total liabilities and stockholders' equity	$	32,362		$	38,516

See accompanying notes to unaudited consolidated financial statements.

3

BIOLASE, INC.

CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS

(Unaudited)

(in thousands, except per share data)

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2019			2018			2019			2018
Net revenue	$	8,645		$	12,154		$	18,971		$	22,174
Cost of revenue		5,265			7,846			12,070			14,833
Gross profit		3,380			4,308			6,901			7,341
Operating expenses:
Sales and marketing		3,272			4,657			7,151			8,548
General and administrative		2,511			2,969			4,903			6,006
Engineering and development		1,124			1,361			2,549			2,650
Change in fair value of patent litigation    settlement liability		(190	)		—			—			—
Total operating expenses		6,717			8,987			14,603			17,204
Loss from operations		(3,337	)		(4,679	)		(7,702	)		(9,863	)
Loss (gain) on foreign currency transactions		5			187			48			(20	)
Interest expense		529			35			1,007			47
Non-operating loss, net		534			222			1,055			27
Loss before income tax provision		(3,871	)		(4,901	)		(8,757	)		(9,890	)
Income tax provision		28			10			42			42
Net loss		(3,899	)		(4,911	)		(8,799	)		(9,932	)
Other comprehensive income item:
Foreign currency translation adjustment		14			(118	)		(41	)		(34	)
Comprehensive loss	$	(3,885	)	$	(5,029	)	$	(8,840	)	$	(9,966	)
Net loss attributable to common stockholders	$	(3,899	)	$	(4,911	)	$	(8,799	)	$	(9,932	)
Net loss per share:
Basic	$	(0.18	)	$	(0.24	)	$	(0.41	)	$	(0.48	)
Diluted	$	(0.18	)	$	(0.24	)	$	(0.41	)	$	(0.48	)
Shares used in the calculation of net loss per share:
Basic		21,595			20,538			21,366			20,504
Diluted		21,595			20,538			21,366			20,504

See accompanying notes to unaudited consolidated financial statements.

4

BIOLASE, INC.

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY

(Unaudited, in thousands)

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2019			2018			2019			2018
Total stockholders' equity,  beginning balances	$	6,973		$	24,937		$	11,089		$	29,260
Common stock and additional paid-in capital:
Beginning balance		229,290			225,626			228,451			225,012
Issuance of common stock upon exercise of options		—			—			3			2
Stock offering costs		—			—			—			(38	)
Liability award settlement		7			—			209			—
Stock-based compensation expense		488			483			1,122			1,133
Warrants issued in connection with debt instruments		209			—			209			—
Ending balance		229,994			226,109			229,994			226,109
Accumulated other comprehensive loss:
Beginning balance		(725	)		(492	)		(670	)		(576	)
Other comprehensive (loss) income		14			(118	)		(41	)		(34	)
Ending balance		(711	)		(610	)		(711	)		(610	)
Accumulated deficit
Beginning balance		(221,592	)		(200,198	)		(216,692	)		(195,177	)
Net loss		(3,899	)		(4,911	)		(8,799	)		(9,932	)
Ending balance		(225,491	)		(205,109	)		(225,491	)		(205,109	)
Total stockholders' equity, ending balances	$	3,792		$	20,390		$	3,792		$	20,390

See accompanying notes to unaudited consolidated financial statements.

5

BIOLASE, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited, in thousands)

	Six Months Ended
	June 30,
	2019			2018
Cash Flows from Operating Activities:
Net loss	$	(8,799	)	$	(9,932	)
Adjustments to reconcile net loss to net cash and cash equivalents used in    operating activities:
Depreciation and amortization		529			509
Provision for bad debts		111			230
Provision for inventory excess and obsolescence		—			59
Amortization of discounts on lines of credit		109			17
Amortization of debt issuance costs		86			25
Stock-based compensation		1,204			1,258
Deferred income taxes		(5	)		2
Earned interest income		—			(1	)
Changes in operating assets and liabilities:
Accounts receivable		1,263			(504	)
Inventory		(86	)		(1,769	)
Prepaid expenses and other current assets		644			105
Accounts payable and accrued liabilities		(1,720	)		2,074
Deferred revenue		37			(418	)
Net cash and cash equivalents used in operating activities		(6,627	)		(8,345	)
Cash Flows from Investing Activities:
Purchases of property, plant, and equipment		(125	)		(110	)
Net cash and cash equivalents used in investing activities		(125	)		(110	)
Cash Flows from Financing Activities:
Principal payments under capital lease obligation		—			(46	)
Borrowings under line of credit		—			1,823
Payments under line of credit		—			(1,823	)
Borrowings under term loan		2,500			—
Payments of debt issuance costs		(38	)		(87	)
Payments of equity offering costs		—			(138	)
Proceeds from exercise of stock options		4			2
Net cash and cash equivalents provided by (used in) financing activities		2,466			(269	)
Effect of exchange rate changes		(38	)		(26	)
Decrease in cash, cash equivalents and restricted cash		(4,324	)		(8,750	)
Cash, cash equivalents and restricted cash, beginning of period		8,356			11,896
Cash, cash equivalents and restricted cash, end of period	$	4,032		$	3,146
Supplemental cash flow disclosure:
Cash paid for interest	$	831		$	—
Cash paid for income taxes	$	12		$	15
Cash paid for operating leases	$	414		$	—
Non-cash accrual for capital expenditures	$	17		$	—
Non-cash right-of-use assets obtained in exchange for lease obligation	$	824		$	—
Warrants issued in connection with debt instruments	$	209		$	—

See accompanying notes to unaudited consolidated financial statements.

6

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

NOTE 1—DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION

The Company

BIOLASE, Inc. (“BIOLASE” and, together with its consolidated subsidiaries, the “Company”) is a medical device company that develops, manufactures, markets, and sells laser systems in dentistry and medicine and also markets, sells, and distributes dental imaging equipment, including three-dimensional CAD/CAM intra-oral scanners and digital dentistry software.

Basis of Presentation

The unaudited consolidated financial statements include the accounts of BIOLASE and its wholly-owned subsidiaries and have been prepared on a basis consistent with the December 31, 2018 audited consolidated financial statements and include all material adjustments, consisting of normal recurring adjustments and the elimination of all material intercompany transactions and balances, necessary to fairly present the information set forth therein. These unaudited, interim, consolidated financial statements do not include all the footnotes, presentations, and disclosures normally required by accounting principles generally accepted in the United States of America (“GAAP”) for complete consolidated financial statements.

The consolidated results of operations for the three and six months ended June 30, 2019 are not necessarily indicative of the results for the full year. The accompanying consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto for the year ended December 31, 2018, included in BIOLASE’s Annual Report on Form 10-K for the year ended December 31, 2018 filed with the Securities and Exchange Commission (the “SEC”) on March 8, 2019 (the “2018 Form 10-K”).

Liquidity and Management’s Plans

The Company incurred a loss from operations and a net loss, and used cash in operating activities for the three and six months ended June 30, 2019. The Company’s recurring losses, level of cash used in operations, and potential need for additional capital, along with uncertainties surrounding the Company’s ability to raise additional capital, raise substantial doubt about the Company’s ability to continue as a going concern. The financial statements do not include any adjustments that might be necessary if the Company is unable to continue as a going concern.

As of March 31, 2019, the Company was not in compliance with certain of its loan covenants relating to the SWK Loan (as defined below). In May 2019, SWK Funding, LLC granted the Company a waiver of such covenants. On May 7, 2019, the Company entered into an amendment of its Credit Agreement with SWK Funding, LLC to increase the total loan commitment in the SWK Loan from $12.5 million to $15.0 million, to revise certain of the financial covenants and to issue additional warrants to purchase the Company’s common stock. See Note 9 for additional information.

As of June 30, 2019, the Company had working capital of approximately $13.8 million. The Company’s principal sources of liquidity as of June 30, 2019 consisted of approximately $4.0 million in cash, cash equivalents and restricted cash and $9.7 million of accounts receivable.  

In order for the Company to continue operations beyond the next 12 months and be able to discharge its liabilities and commitments in the normal course of business, it must sell its products directly to end users and through distributors, establish profitable operations through increased sales, decrease expenses, generate cash from operations, or obtain additional funds when needed. The Company intends to improve its financial condition and ultimately improve its financial results by increasing revenues through expansion of its product offerings, continuing to expand and develop its field sales force and distributor relationships both domestically and internationally, forming strategic arrangements within the dental and medical industries, educating dental and medical patients as to the benefits of its advanced medical technologies, and reducing expenses.

7

Additional capital requirements may depend on many factors, including, among other things, continued losses, the rate at which the Company’s business grows, demands for working capital, manufacturing capacity, and any acquisitions that the Company may pursue. From time to time, the Company could be required, or may otherwise attempt, to raise capital, through either equity or debt offerings, or enter into an additional line of credit facility.

Reverse Stock Split

Except as the context otherwise requires, all share numbers and share price amounts (including exercise prices and closing market prices) contained in the unaudited financial statements and notes thereto reflect the one-for-five reverse stock split (“the Reverse Stock Split”) effectuated by the Company on May 10, 2018. See Note 4 below for additional information.

NOTE 2—SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Use of Estimates

The preparation of these unaudited consolidated financial statements in conformity with GAAP requires the Company to make estimates and assumptions that affect amounts reported in the consolidated financial statements and the accompanying notes. Significant estimates in these unaudited consolidated financial statements include allowances on accounts receivable, inventory, and deferred taxes, as well as estimates for accrued warranty expenses, goodwill and the ability of goodwill to be realized, revenue deferrals, effects of stock-based compensation and warrants, contingent liabilities, and the provision or benefit for income taxes. Due to the inherent uncertainty involved in making estimates, actual results reported in future periods may differ materially from those estimates.

Critical Accounting Policies

Information with respect to the Company’s critical accounting policies, which management believes could have the most significant effect on the Company’s reported results and require subjective or complex judgments by management is contained in Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” of the 2018 Form 10-K. Management believes that there have been no significant changes during the six months ended June 30, 2019 in the Company’s critical accounting policies from those disclosed in Item 7 of the 2018 Form 10-K.

Fair Value of Financial Instruments

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants in the principal market (or, if none exists, the most advantageous market) for the specific asset or liability at the measurement date (referred to as the “exit price”). The fair value is based on assumptions that market participants would use, including a consideration of non-performance risk. Under the accounting guidance for fair value hierarchy, there are three levels of measurement inputs. Level 1 inputs are quoted prices in active markets for identical assets or liabilities. Level 2 inputs are observable, either directly or indirectly. Level 3 inputs are unobservable due to little or no corroborating market data.

The Company’s financial instruments, consisting of cash, cash equivalents, restricted cash, accounts receivable, accounts payable, accrued liabilities, and the SWK Loan as discussed in Note 9, approximate fair value because of the liquid or short-term nature of these items.

Concentration of Credit Risk, Interest Rate Risk and Foreign Currency Exchange Rate

Financial instruments which potentially expose the Company to a concentration of credit risk consist principally of cash and cash equivalents, restricted cash, and trade accounts receivable. The Company maintains its cash and cash equivalents and restricted cash with established commercial banks. At times, balances may exceed federally insured limits. To minimize the risk associated with trade accounts receivable, management performs ongoing credit evaluations of customers’ financial condition and maintains relationships with the Company’s customers that allow management to monitor current changes in business operations so the Company can respond as needed. The Company does not, generally, require customers to provide collateral before it sells them its products. However, the Company has required certain distributors to make prepayments for significant purchases of products.

8

Substantially all of the Company’s revenue is denominated in U.S. dollars, including sales to international distributors. Only a small portion of its revenue and expenses is denominated in foreign currencies, principally the Euro and Indian Rupee. The Company’s foreign currency expenditures primarily consist of the cost of maintaining offices, consulting services, and employee-related costs. During the six-month periods ended June 30, 2019 and 2018, the Company did not enter into any hedging contracts. Future fluctuations in the value of the U.S. dollar may affect the price competitiveness of the Company’s products outside the U.S.

Recent Accounting Pronouncements

Changes to GAAP are established by the Financial Accounting Standards Board (the “FASB”) in the form of accounting standards updates (“ASUs”) to the FASB’s Accounting Standards Codification.

The Company considers the applicability and impact of all ASUs. ASUs not listed below were assessed and determined not to be applicable or are expected to have minimal impact on the Company’s consolidated financial position and results of operations.

Adopted Accounting Pronouncements

In February 2016, the FASB established ASU Topic 842 – Leases, by issuing ASU Topic No. 2016-02 (“Topic 842”), which requires lessees to recognize lease on-balance sheet and disclose key information about leasing arrangements. Topic 842 was subsequently amended by ASU Topic 2018-11 – Targeted Improvements. The new standard establishes a right-of-use model (“ROU”) that requires a lessee to recognize a ROU asset and a lease liability for all leases with a term longer than 12 months. Leases will be classified as finance or operating, with classification affecting the pattern and classification of expense recognition in the statement of operations.

The Company adopted Topic 842 in the first quarter of 2019 utilizing the modified retrospective transition method and a cumulative effect adjustment at the beginning of the first quarter of 2019. The Company has elected the package of practical expedients, which allows the Company not to reassess (1) whether any expired or existing contracts as of the adoption date are or contain a lease, (2) lease classification for any expired or existing leases as of the adoption date, and (3) initial direct costs for any existing leases as of the adoption date. The Company did not elect to apply the hindsight practical expedient when determining lease term and assessing impairment of the right-to-use assets. The adoption of Topic 842 resulted in the recognition of right-of use assets of approximately $0.8 million after a $0.2 million adjustment for deferred rent, and lease liabilities for operating leases of approximately $1.0 million, and no cumulative effect adjustment on retained earnings on its unaudited Consolidated Balance Sheets nor material impact to its unaudited Consolidated Statements of Operations and Comprehensive Loss in the period of adoption. Right-of-use assets are included in Other assets, and lease liabilities are included in Accrued liabilities or Other liabilities in the unaudited consolidated balance sheet for the period ended June 30, 2019. See Note 10 for additional information.

Recently Issued Accounting Standards

In June 2016, the FASB issued a new standard to replace the incurred loss impairment methodology under current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. The Company will be required to use a forward-looking expected credit loss model for accounts receivables, loans, and other financial instruments. Credit losses relating to available-for-sale debt securities will also be recorded through an allowance for credit losses rather than as a reduction in the amortized cost basis of the securities. The standard will be effective for the Company beginning January 1, 2020, with early adoption permitted beginning January 1, 2019. The Company is currently evaluating the impact of this standard on the Company’s consolidated financial statements, including accounting policies, processes, and systems.

9

NOTE 3 – REVENUE RECOGNITION

Contracts with Customers

Revenue for sales of products and services is derived from contracts with customers. The products and services promised in customer contracts include delivery of laser systems, imaging systems, and consumables as well as certain ancillary services such as training and extended warranties. Contracts with each customer generally state the terms of the sale, including the description, quantity and price of each product or service. Payment terms are stated in the contract and vary according to the arrangement. Because the customer typically agrees to a stated rate and price in the contract that does not vary over the life of the contract, the Company’s contracts do not contain variable consideration. The Company establishes a provision for estimated warranty expense.

Performance Obligations

At contract inception, the Company assesses the products and services promised in its contracts with customers. The Company then identifies performance obligations to transfer distinct products or services to the customers. In order to identify performance obligations, the Company considers all of the products or services promised in contracts regardless of whether they are explicitly stated or are implied by customary business practices.

Revenue from products and services transferred to customers at a single point in time accounted for 81% and 82% of net revenue for the three and six months ended June 30, 2019, respectively, and 87% and 85% for the three and six months ended June 30, 2018, respectively. The majority of the Company’s revenue recognized at a point in time is for the sale laser systems, imaging systems, and consumables. Revenue from these contracts is recognized when the customer is able to direct the use of and obtain substantially all of the benefits from the product which generally coincides with title transfer during the shipping process.

Revenue from services transferred to customers over time accounted for 19% and 18% of net revenue for the three and six months ended June 30, 2019, respectively, and 13% and 15% for the three and six months ended June 30, 2018, respectively. The majority of the Company’s revenue that is recognized over time relates to product training and extended warranties. Deferred revenue attributable to undelivered elements, which primarily consists of product training, totaled approximately $0.6 million and $0.7 million as of June 30, 2019 and December 31, 2018, respectively.

Transaction Price Allocation

The transaction price for a contract is allocated to each distinct performance obligation and recognized as revenue when, or as, each performance obligation is satisfied. For contracts with multiple performance obligations, the Company allocates the contract’s transaction price to each performance obligation using the best estimate of the standalone selling price of each distinct good or service in a contract. The primary method used to estimate standalone selling price is the observable price when the good or service is sold separately in similar circumstances and to similar customers.

Significant Judgments

Revenue is recorded for extended warranties over time as the customer benefits from the warranty coverage. This revenue will be recognized equally throughout the contract period as the customer receives benefits from the Company's promise to provide such services. Revenue is recorded for product training as the customer attends a training program or upon the expiration of the obligation, which is generally after nine months.

The Company also has contracts that include both the product sales and product training as performance obligations. In those cases, the Company records revenue for product sales at the point in time when the product has been shipped. The customer obtains control of the product when it is shipped, as all shipments are made FOB shipping point, and after the customer selects its shipping method and pays all shipping costs and insurance. The Company has concluded that control is transferred to the customer upon shipment.

10

Accounts Receivable

Accounts receivable are stated at estimated net realizable value. The allowance for bad debts is based on an analysis of customer accounts and the Company’s historical experience with accounts receivable write-offs.

Contract Liabilities

The Company performs its obligations under a contract with a customer by transferring products and/or services in exchange for consideration from the customer. The Company typically invoices its customers as soon as control of an asset is transferred and a receivable for the Company is established. The Company, however, recognizes a contract liability when a customer prepays for goods and/or services and the Company has not transferred control of the goods and/or services. The opening and closing balances of the Company’s contract liabilities are as follows (in thousands):

	June 30,		December 31,
	2019		2018
Undelivered elements (training, installation, product and    support services)	$	563	$	730
Extended warranty contracts		1,945		1,735
Deferred royalties		5		11
Total deferred revenue		2,513		2,476
Less long-term portion of deferred revenue		—		—
Deferred revenue — current	$	2,513	$	2,476

The balance of contract assets was immaterial as the Company did not have a significant amount of uninvoiced receivables at June 30, 2019 and December 31, 2018.

The amount of revenue recognized during the six-month period ended June 30, 2019 and June 30, 2018, and included in the opening contract liability balance related to undelivered elements was $0.3 million and $0.6 million, respectively. The amount of revenue recognized during the six-month period ended June 30, 2019 and June 30, 2018 related to extended warranty contracts was $0.4 million and $0.7 million respectively. Revenue recognized during 2018 and 2019 relating to deferred royalties was not material in either period.

Disaggregation of Revenue

The Company disaggregates revenue from contracts with customers into geographical regions and by the timing of when goods and services are transferred. The Company determined that disaggregating revenue into these categories depicts how the nature, amount, timing and uncertainty of revenue and cash flows are affected by regional economic factors.

The Company’s revenues related to the following geographic areas were as follows for the periods indicated (in thousands):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
United States	$	5,898	$	7,164	$	12,014	$	12,857
International		2,747		4,990		6,957		9,317
	$	8,645	$	12,154	$	18,971	$	22,174

11

Information regarding revenues disaggregated by the timing of when goods and services are transferred is as follows (in thousands):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
Revenue recognized over time	$	1,646	$	1,557	$	3,415	$	3,254
Revenue recognized at a point in time		6,999		10,597		15,556		18,920
Total	$	8,645	$	12,154	$	18,971	$	22,174

The Company’s sales by end market were as follows for the periods indicated (in thousands):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
End-customer	$	5,553	$	7,675	$	11,254	$	13,712
Distributors		3,092		4,479		7,717		8,462
	$	8,645	$	12,154	$	18,971	$	22,174

The Company acts as the principal in all its imaging equipment distribution sales. The Company takes possession and control of the equipment before they are sold and transferred to the customer. The Company provides the equipment and any related services directly to the customer. The Company has inventory risk before the equipment is transferred to a customer. The Company purchases and obtains the goods before obtaining a contract with a customer. The Company also has discretion in establishing the price sold to the customer for the equipment.

The percentages of the Company’s sales by product line were as follows for the periods indicated:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2019			2018			2019			2018
Laser systems		56.9	%		65.2	%		57.4	%		61.4	%
Imaging systems		0.7	%		3.1	%		3.2	%		4.3	%
Consumables and other		24.2	%		18.9	%		22.2	%		19.6	%
Services		18.2	%		12.8	%		17.2	%		14.7	%
License fees and royalties		—	%		—	%		—	%		—	%
		100.0	%		100.0	%		100.0	%		100.0	%

Shipping and Handling Costs and Revenues

Shipping and freight costs are treated as fulfillment costs. For shipments to end-customers, the customer bears the shipping and freight costs and has control of the product upon shipment. For shipments to distributors, the distributor bears the shipping and freight costs, including insurance, tariffs and other import/export costs.

NOTE 4—STOCKHOLDERS’ EQUITY

Reverse Stock Split

At BIOLASE’s annual meeting of stockholders on May 9, 2018 (the “2018 Annual Meeting”), BIOLASE stockholders approved an amendment to BIOLASE’s Restated Certificate of Incorporation, as amended, to effect the Reverse Stock Split of BIOLASE common stock and on May 10, 2018, the Company filed an amendment (the “Amendment”) to its Restated Certificate of Incorporation, as amended, with the Secretary of State of the State of Delaware to effect the Reverse Stock Split, effective as of 11:59 p.m. on May 10, 2018. The Amendment also reduced the authorized shares of common stock from 200,000,000 shares to 40,000,000 shares. Prior year share and per share amounts have been adjusted to reflect the impact of the Reverse Stock Split.

12

Stock-Based Compensation

2002 Stock Incentive Plan

The 2002 Stock Incentive Plan (as amended effective as of May 26, 2004, November 15, 2005, May 16, 2007, May 5, 2011, June 6, 2013, October 30, 2014, April 27, 2015, and May 6, 2016, the “2002 Plan”) was replaced by the 2018 Plan (as defined below) with respect to future equity awards. Persons eligible to receive awards under the 2002 Plan included officers, employees, and directors of the Company, as well as consultants. As of June 30, 2019, a total of approximately 3.1 million shares of the Company’s common stock have been authorized for issuance under the 2002 Plan, of which approximately 1.5 million shares of the Company’s common stock have been issued pursuant to options that were exercised and restricted stock units (“RSUs”) that were settled in common stock and 1.6 million shares of common stock have been reserved for outstanding options and unvested RSUs, and no shares are available for future grants.

2018 Stock Incentive Plan

At the 2018 Annual Meeting, the Company’s stockholders approved the 2018 Long-Term Incentive Plan (as amended, the “2018 Plan”), which was amended by Amendment No. 1 to the 2018 Plan, approved by the Company’s stockholders at a special meeting on September 21, 2018 and Amendment No. 2 to the 2018 Plan, approved by the Company’s stockholder’s at its annual meeting of stockholders on May 15, 2019. The purposes of the 2018 Plan are (i) to align the interests of the Company’s stockholders and recipients of awards under the 2018 Plan by increasing the proprietary interest of such recipients in the Company’s growth and success; (ii) to advance the interests of the Company by attracting and retaining non-employee directors, officers, other employees, consultants, independent contractors and agents; and (iii) to motivate such persons to act in the long-term best interests of the Company and its stockholders.

Subject to the terms and conditions of the 2018 Plan, the number of shares authorized for grants under the 2018 Plan is 5.0 million. As of June 30, 2019, a total 1.4 million shares of the Company’s common stock have been reserved for outstanding options and unvested RSUs, and 3.6 million shares of common stock remain available for future grants.

The Company recognized stock-based compensation expense of $0.5 million and $0.6 million, for the three months ended June 30, 2019 and June 30, 2018, respectively, and $1.2 million and $1.3 million for the six months ended June 30, 2019 and June 30, 2018, respectively, based on the grant-date fair value. As of June 30, the Company had approximately $1.6 million of total unrecognized compensation expense, net of estimated forfeitures, related to unvested share-based compensation arrangements. The Company expects that expense to be recognized over a weighted-average period of 2.0 years.

The following table summarizes the income statement classification of compensation expense associated with share-based payments (in thousands):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
Cost of revenue	$	54	$	105	$	136	$	162
Sales and marketing		78		154		238		234
General and administrative		283		207		724		674
Engineering and development		32		91		106		188
	$	447	$	557	$	1,204	$	1,258

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The stock option fair values were estimated using the Black-Scholes option-pricing model with the following assumptions:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2019			2018			2019			2018
Expected term	6.1 years			5.7 years			6.1 years			5.9 years
Volatility		85.0	%		81.2	%		85.8	%		81.4	%
Annual dividend per share	$	—		$	—		$	—		$	—
Risk-free interest rate		2.50	%		2.71	%		2.60	%		2.46	%

A summary of option activity for the six months ended June 30, 2019 is as follows (in thousands, except per share data):

						Weighted Average
				Weighted		Remaining
				Average		Contractual		Aggregate
	Shares			Exercise Price		Term (Years)		Intrinsic Value(1)
Options outstanding, December 31, 2018		1,623		$	6.54			$	—
Granted at fair market value		70		$	2.08
Exercised		(2	)	$	2.10
Forfeited, cancelled, or expired		(159	)	$	5.77
Options outstanding at June 30, 2019		1,532		$	6.42		5.46	$	16,200
Options exercisable at June 30, 2019		1,165		$	7.56		4.61	$	—
Vested options expired during the quarter ended June 30, 2019		14		$	13.25

(1) The intrinsic value calculation does not include negative values. This can occur when the fair market value on the reporting date is less than the exercise price of the grant.

A summary of unvested stock option activity for the six months ended June 30, 2019 is as follows (in thousands, except per share data):

				Weighted
				Average Grant
	Shares			Date Fair Value
Unvested options at December 31, 2018		522		$	2.11
Granted		70		$	1.53
Vested		(147	)	$	2.94
Forfeited or cancelled		(78	)	$	2.62
Unvested options at June 30, 2019		367		$	1.56

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Cash proceeds, along with fair value disclosures related to grants, exercises and vested options are as follows (in thousands, except per share amounts):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
Proceeds from stock options exercised	$	—	$	—	$	3	$	2
Tax benefit related to stock options    exercised (1)	N/A		N/A		N/A		N/A
Intrinsic value of stock options exercised (2)	$	—	$	—	$	—	$	—
Weighted-average fair value of options    granted during period	$	1.53	$	1.27	$	1.53	$	1.46
Total fair value of shares vested during the    period	$	90	$	843	$	431	$	245

(1) Excess tax benefits received related to stock option exercises are presented as operating cash inflows. The Company currently does not receive a tax benefit related to the exercise of stock options due to the Company’s net operating losses.

(2) The intrinsic value of stock options exercised is the amount by which the market price of the stock on the date of exercise exceeded the market price of the stock on the date of grant.

Restricted Stock Units

There were no material grants made during the three and six months ended June 30, 2019.

A summary of unvested RSU activity for the six months ended June 30, 2019 is as follows (in thousands, except per share amounts):

				Weighted
				Average Grant
	Shares			Date Fair Value
Unvested RSUs at December 31, 2018		2,163		$	1.84
Granted		97		$	2.08
Vested		(794	)	$	1.74
Forfeited or cancelled		(213	)	$	2.37
Unvested RSUs at June 30, 2019		1,253		$	1.87

Warrants

The Company issues warrants to acquire shares of the Company’s common stock as approved by the Board. A summary of warrant activity for the six months ended June 30, 2019 is as follows (in thousands, except exercise price amounts):

			Weighted
			Average
	Shares		Exercise Price
Warrants outstanding, December 31, 2018		1,934	$	6.62
Granted or Issued		149	$	2.22
Exercised		—	$	—
Forfeited, cancelled, or expired		—	$	—
Warrants outstanding at June 30, 2019		2,083	$	6.30
Warrants exercisable at June 30, 2019		2,083	$	6.30
Vested warrants expired during the quarter ended June 30, 2019		—	$	—

15

See Note 9 for additional information on the Western Alliance Warrants, the SWK Warrants, and the DPG Warrants (each as defined below).

Net Loss Per Share – Basic and Diluted

Basic net loss per share is computed by dividing net loss available to common stockholders by the weighted-average number of shares of the Company’s common stock outstanding for the period. In computing diluted net loss per share, the weighted average number of shares outstanding is adjusted to reflect the effect of potentially dilutive securities.

Outstanding stock options, RSUs and warrants to purchase approximately 5.7 million shares were not included in the calculation of diluted loss per share for the three and six months ended June 30, 2019, as their effect would have been anti-dilutive. For the same 2018 periods, anti-dilutive outstanding stock options and warrants to purchase 3.8 million shares were not included in the computation of diluted loss per share.

NOTE 5—INVENTORY

Inventory is valued at the lower of cost or net realizable value and is comprised of the following (in thousands):

	June 30,		December 31,
	2019		2018
Raw materials	$	3,909	$	3,590
Work-in-process		1,342		1,435
Finished goods		7,083		7,223
Inventory	$	12,334	$	12,248

Inventory includes write-downs for excess and obsolete inventory totaling approximately $1.1 million and $1.1 million as of June 30, 2019 and December 31, 2018, respectively.

NOTE 6—PROPERTY, PLANT, AND EQUIPMENT

Property, plant, and equipment, net is comprised of the following (in thousands):

	June 30,			December 31,
	2019			2018
Building	$	211		$	213
Leasehold improvements		2,004			2,004
Equipment and computers		7,423			7,277
Furniture and fixtures		634			634
Construction in progress		20			25
		10,292			10,153
Accumulated depreciation and amortization		(8,872	)		(8,344	)
		1,420			1,809
Land		165			166
Property, plant, and equipment, net	$	1,585		$	1,975

Depreciation and amortization expense related to property, plant, and equipment totaled $0.3 million and $0.5 million for the three and six months ended June 30, 2019, respectively, and $0.2 million and $0.5 million for the three and six months ended June 30, 2018.

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NOTE 7—INTANGIBLE ASSETS AND GOODWILL

The Company conducted its annual impairment test of goodwill as of June 30, 2019 and determined that there was no impairment. The Company also tests its intangible assets and goodwill between the annual impairment tests if events occur or circumstances change that would more likely than not reduce the fair value of the Company or its assets below their carrying amounts. For intangible assets subject to amortization, the Company performs its impairment test when indicators, such as reductions in demand or significant economic slowdowns, are present. No events have occurred since June 30, 2019 through the date of these unaudited consolidated financial statements that would trigger further impairment testing of the Company’s intangible assets and goodwill.

As of June 30, 2019 and December 31, 2018, the Company had goodwill of $2.9 million. As of June 30, 2019 and December 31, 2018, all intangible assets have been fully amortized and no amortization expense was recognized during the three and six months ended June 30, 2019 and 2018.

NOTE 8—ACCRUED LIABILITIES

Accrued liabilities are comprised of the following (in thousands):

	June 30,		December 31,
	2019		2018
Payroll and benefits	$	1,660	$	2,400
Patent litigation settlement		—		1,500
Warranty accrual, current portion		764		861
Lease liability		565		—
Accrued professional services		1,060		1,044
Taxes		412		714
Accrued insurance premium		44		328
Customer deposits		19		21
Other		375		670
Total accrued liabilities	$	4,899	$	7,538

Changes in the initial product warranty accrual and the expenses incurred under the Company’s initial and extended warranties for the three and six months ended June 30, 2019 and 2018 are included within accrued liabilities on the Consolidated Balance Sheets and were as follows (in thousands):

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2019			2018			2019			2018
Balance, beginning of period	$	1,384		$	1,214		$	1,308		$	1,190
Provision for estimated warranty cost		383			378			622			624
Warranty expenditures		(268	)		(233	)		(431	)		(455	)
Balance, June 30		1,499			1,359			1,499			1,359
Less warranty accrual, long-term		735			221			735			221
Total warranty accrual, current portion	$	764		$	1,138		$	764		$	1,138

The Company’s Waterlase laser systems sold worldwide are covered by a warranty against defects in material and workmanship for a period of up to 16 months domestically and up to 28 months internationally, from the date of sale by the Company or a distributor to the end-user. The Company’s Diode systems sold worldwide are covered by a warranty against defects in material and workmanship for a period of up to 28 months from the date of sale by the Company or a distributor to the end-user.

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NOTE 9—DEBT

The following table presents the details of the principal outstanding and unamortized discount (in thousands):

	June 30,			December 31,
	2019			2018
Term loan	$	15,000		$	12,500
Discount and debt issuance costs on term loan		(1,672	)		(1,664	)
Total long-term debt, net	$	13,328		$	10,836

Line of Credit

On March 6, 2018, BIOLASE and two of its wholly-owned subsidiaries (such subsidiaries, together with BIOLASE, the “Borrower”) entered into the Business Financing Agreement (the “Business Financing Agreement”) with Western Alliance Bank (“Western Alliance”).Pursuant to the terms and conditions of the Business Financing Agreement, Western Alliance agreed to provide the Borrower a secured revolving line of credit permitting the Borrower to borrow or receive letters of credit up to the lesser of $6.0 million (the “Domestic Revolver”) (subject to a $6.0 million credit limit relating to domestic eligible accounts receivable (the “Domestic Credit Limit”) and a $3.0 million credit limit relating to export-related (the “EXIM Revolver”) eligible accounts receivable (the “EXIM Credit Limit”)) and the borrowing base, which is defined as the sum of the domestic borrowing base (up to 75% of the Borrower’s eligible domestic accounts receivable less such reserves as Western Alliance may deem proper and necessary) and the export-related borrowing base (up to 85% of the Borrower’s eligible export-related accounts receivable less such reserves as Western Alliance may deem proper and necessary). The Business Financing Agreement was set to expire on March 6, 2020, and the Borrower’s obligations thereunder were secured by a security interest in all of the Borrower’s assets.

The Business Financing Agreement required the Company to maintain compliance with certain financial and non-financial covenants, as defined therein. Western Alliance had the right to declare the amounts outstanding under the Business Financing Agreement immediately due and payable upon a default.

Amounts outstanding under the Business Financing Agreement bore interest at a per annum floating rate equal to the greater of 4.5% or the “Prime Rate” published in the Money Rates section of the Western Edition of The Wall Street Journal (or such other rate of interest publicly announced from time to time by Western Alliance as its “Prime Rate”), plus 1.5% with respect to advances made under the line of credit, plus an additional 5.0% during any period that an event of default occurred and was continuing. The commitment fee under the Business Financing Agreement was 0.25% of the domestic credit limit and 1.75% of the EXIM credit limit, payable on March 6, 2018 and each anniversary thereof. 

Pursuant to the Business Financing Agreement, the Company paid the first of two annual commitment fees totaling $67,500, being 0.25% of the aggregate $6.0 million commitment for the Domestic Revolver and 1.75% of the aggregate $3.0 million commitment for the EXIM Revolver. The commitment fees and the legal costs associated with acquiring the credit facilities were capitalized and were amortized on a straight-line basis as interest expense over the term of the Business Financing Agreement.

As additional consideration for the lines of credit, the Company also issued to Western Alliance warrants to purchase shares of the Company’s common stock (the “Original Western Alliance Warrants”). The fair value of the Original Western Alliance Warrants was estimated using the Black-Scholes option-pricing model with the following assumptions: expected term of 10 years; volatility of 91.49%; annual dividend per share of $0.00; and risk-free interest rate of 2.88%; and resulted in an estimated fair value of $0.1 million, which was recorded as a liability and resulted in a discount to the credit facilities at issuance. The discount was expensed to interest expense at the time the Business Financing Agreement was terminated, as discussed below.

18

On August 13, 2018, the Borrower and Western Alliance entered into a Waiver and Business Financing Modification Agreement, pursuant to which Western Alliance waived certain of the Borrower’s covenants under the Business Financing Agreement and provided an advance of $1.5 million, which advance was due by September 27, 2018.

On September 27, 2018, the Borrower and Western Alliance entered into a second Business Financing Modification Agreement which reduced the credit limit under the Business Financing Agreement to $2.5 million and extended the due date of the $1.5 million advance to March 6, 2019. In connection with the agreement, the Original Western Alliance Warrants were terminated, and the Company issued to Western Alliance new warrants (the “Western Alliance Warrants”) to purchase up to 56,338 shares of the Company’s common stock. The Western Alliance Warrants are immediately exercisable and expire on September 27, 2028. These warrants contain down-round features that require the Company to adjust the exercise price proportionately should the Company issue shares at a price less than the $2.13 per share exercise price.

On October 22, 2018, the Borrower and Western Alliance entered into a third Business Financing Modification Agreement, pursuant to which Western Alliance waived BIOLASE’s non-compliance with certain financial operating covenants as set forth in the Business Financing Agreement, and the Borrower agreed to certain amended covenants contained in the Business Financing Agreement, including a $300,000 minimum unrestricted cash balance covenant and a waiver of reporting items required to be delivered by BIOLASE to Western Alliance under the Business Financing Agreement.

On November 9, 2018, all outstanding borrowings, accrued interest and fees under the Business Financing Agreement were repaid with a portion of the proceeds under the Credit Agreement (as defined and described below), and the Business Financing Agreement was terminated. The Company recorded approximately $0.1 million of interest expense including unamortized debt issuance costs that were written-off upon extinguishment of the debt. As of June 30, 2019 and December 31, 2018, the Western Alliance Warrants remain outstanding and are classified in equity in the consolidated balance sheet.

Term Loan

On November 9, 2018, the Company entered into a five-year secured Credit Agreement (the “Credit Agreement”) with SWK Funding LLC (“SWK”), pursuant to which the Company has borrowed $12.5 million (the “SWK Loan”). The Company’s obligations under the Credit Agreement are secured by substantially all of the Company’s assets. Under the terms of the Credit Agreement, repayment of the loan is interest-only for the first two years, paid quarterly with the option to extend the interest-only period. Principal repayments will begin in the first quarter of 2021 and will be approximately $0.7 million quarterly until the loan matures in the fourth quarter of 2023. The loan bears interest at 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. Approximately $0.9 million of the proceeds from the SWK Loan were used to pay off all amounts owed to Western Alliance under the Business Financing Agreement. The Company plans to use the remaining proceeds to provide additional working capital to fund its growth initiatives, such as broadening its customer base and increasing the utilization of its products to drive recurring higher margin consumables revenue.

The Credit Agreement contains financial and non-financial covenants requiring the Company to, among other things, (i) maintain unencumbered liquid assets of no less than $1.5 million or 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.

In connection with the SWK Loan, the Company paid approximately $1.0 million in debt issuance costs, including a $0.2 million loan origination fee, a $0.4 million finder’s fee, and $0.4 million in legal and other fees. These costs were recognized as a discount on the SWK Loan and are being amortized on a straight-line basis over the loan term which approximates the effective-interest method.

19

The Company recognized approximately $0.5 million in interest expense relating to the SWK Loan for the period ended June 30, 2019. The weighted-average interest rate for the three months ended June 30, 2019 was 12.7%.

As of March 31, 2019, the Company was not in compliance with certain covenants in the Credit Agreement, as described in Note 9 and in May 2019, SWK granted the Company a waiver of such covenants. On May 7, 2019, the Company and SWK agreed to amend the Credit Agreement (the “First Amendment) to increase the total commitment from $12.5 million to $15.0 million, and to revise the financial covenants to (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 does not reach set minimum revenue levels for the three-month period ended June 30, 2019, and (c) require minimum liquidity of $1.5 million at all times. The First Amendment provides that if aggregate minimum revenue and EBITDA levels are not achieved by September 30, 2019, the minimum liquidity requirement will be increased to $3.0 million, until the Company has obtained additional equity or debt funding of no less than $5.0 million.

In connection with the amendment, the Company paid to SWK loan origination and other fees of approximately $0.1 million payable in cash and approximately $0.2 million in additional SWK Warrants (as defined below) to purchase the Company’s common stock. The Company will also pay an additional finder’s fee to Deal Partners Group (“DPG”) of approximately $0.1 million in cash and $0.1 million in additional DPG Warrants to purchase the Company’s common stock. The Company accounted for the First Amendment as a modification to existing debt and as a result, recognized the amounts paid to SWK in cash and warrants as additional debt issuance costs. Amounts paid to DPG in cash and warrants relating to the First Amendment were expensed as incurred in the Company’s consolidated statement of operations for the three and six months ended June 30, 2019.

SWK Warrants

In connection with the Credit Agreement, as amended, the Company issued warrants to SWK (the “SWK Warrants”) on November 9, 2018 to purchase up to 372,023 and on May 7, 2019, to purchase up to 115,175 shares of the Company’s common stock. The SWK Warrants are immediately exercisable and expire 7 years after the issuance date. The exercise price of the SWK Warrants issued on November 9, 2018 is $1.34 and the exercise price of the SWK Warrants issued on May 7, 2019 is $2.17, both of which were based on the average closing price of the Company’s common stock for the ten trading days immediately preceding the issuance date. These warrants contain down-round features that require the Company to adjust the exercise price proportionately should the Company issue shares at a price per share less than the exercise price. The fair value of the 372,023 SWK Warrants issued on November 9, 2018 was $0.4 million and estimated using the Black-Scholes option-pricing model with the following assumptions: expected term of 8 years; volatility of 81.79%; annual dividend per share of $0.00; and risk-free interest rate of 3.13%. The fair value of the 115,175 SWK Warrants issued on May 7, 2019 was $0.2 million and estimated using a binomial option pricing model with the following assumptions: expected term of 8 years; volatility of 80.73%; annual dividend per share of $0.00; and a risk-free rate of 2.37%.

DPG Warrants

In connection with the SWK Loan, the Company paid a finder’s fee to DPG of $0.5 million cash and issued warrants (“the DPG warrants) on November 9, 2018 to purchase up to 279,851 shares of common stock and on May 7, 2019 to purchase up to 34,552 shares of the Company’s common stock. The DPG Warrants are exercisable immediately and expire 7 years after the issuance date. The exercise price of the DPG Warrants issued on November 9, 2018 is $1.34 and the exercise price of the DPG warrants issued on May 7, 2019 is $2.17, both of which were based on the average closing price of the Company’s common stock for the ten trading days immediately preceding the issuance date. These warrants contain down-round features that require the Company to adjust the exercise price proportionately should the Company issue shares at a price per share less than the exercise price. The fair value of the 279,851 DPG Warrants issued on November 9, 2018 was $0.3 million was estimated using the Black Scholes option pricing model with the following assumptions: expected term of 8 years; volatility of 81.79%; annual dividend per share of $0.00; and risk-free interest rate of 3.13%. The fair value of the 34,552 DPG Warrants issued on May 7, 2019 was $0.1 million and estimated using a binomial option pricing model with the following assumptions: expected term of 8 years; volatility of 80.73%; annual dividend per share of $0.00; and a risk-free rate of 2.37%.

20

The value of both ofthe SWK Warrants issued in 2018 and 2019 and the DPG Warrants issued in 2018, was recognized as a discount on the SWK Loan and is being amortized on a straight-line basiswhich approximates the effective-interest method, over the loan term of five years. The value of the DPG Warrants issued in 2019 in connection with the First Amendment were expensed in the three-month period ended June 30, 2019.

Additionally, based on the adoption of ASU 2017-11 in the fourth quarter of 2018, these warrants are classified as equity in the consolidated Balance Sheets as of June 30, 2019 and December 31, 2018.

The future minimum principal and interest payments as of June 30, 2019 are as follows (in thousands):

	Principal		Interest (1)
2019	$	—	$	936
2020		—		1,872
2021		2,100		1,654
2022		2,800		1,304
2023		10,100		955
Total future payments	$	15,000	$	6,721
(1) estimated using LIBOR rates as at June 30, 2019

NOTE 10— LEASES

The Company enters into operating leases primarily for real estate, office equipment, and fleet vehicles. Lease terms generally range from one to five years, and often include options to renew for one year. On January 1, 2019, the Company adopted Topic 842, using the modified-retrospective approach as discussed in Note 2, and as a result recognized a right-of-use asset of approximately $0.8 million as adjusted for deferred rent at the date of adoption of $0.2 million, and a lease liability of approximately $1.0 million. No cumulative-effect adjustment to retained earnings was required upon adoption of Topic 842. Right-of-use assets are recorded in Other assets and lease liabilities are included in Accrued liabilities or Other liabilities depending on whether they are current or noncurrent. Because the rate implicit in each lease is not readily determinable, the Company uses its incremental borrowing rate (“IBR”) to determine the present value of the lease payments and on the date of adoption, the Company determined its IBR to be 12.78%. This rate was based on the Company’s financing of the SWK Loan which is a collateralized loan, and was based on prevailing market rates during the fourth quarter of 2018.

Information related to the Company’s right-of-use assets and related liabilities were as follows (in thousands):

	Six Months Ended
	June 30, 2019
Cash paid for operating lease liabilities	$	414
Right-of-use assets obtained in exchange for new operating lease    obligations		803
Weighted-average remaining lease term	1.6 years
Weighted-average discount rate		12.8	%

The Company allocates lease cost amongst lease and non-lease components. The Company excludes short-term leases (those with lease terms of less than one year at inception) from the measurement of lease liabilities or right-of-use assets.

21

Maturities of lease liabilities as of June 30, 2019 were as follows (in thousands):

Due in 12 month period ended June 30,
2020	$	622
2021		63
Thereafter		—
	$	685
Less imputed interest		(42	)
Total lease liabilities	$	643
Current operating lease liabilities		565
Non-current lease liabilities		78
Total lease liabilities	$	643

As of June 30, 2019, right-of-use assets were $0.5 million and lease liabilities were $0.6 million. During the three and six months ended June 30, 2019, the Company did not enter into any new lease arrangements, nor did it have any arrangements that had not commenced.

Future minimum rental commitments under lease agreements, as of June 30, 2019, with non-cancelable terms greater than one year for each of the periods ending June 30, are as follows (in thousands):

	Period Ended June 30, 2019
2019	$	622
2020		63
2021		—
2022 and thereafter		—
Total future minimum lease obligations	$	685

NOTE 11— COMMITMENTS AND CONTINGENCIES

On April 24, 2012, CAO Group, Inc. (“CAO”) filed a lawsuit against BIOLASE in the District of Utah alleging that BIOLASE’s ezlase dental laser infringes on U.S. Patent No. 7,485,116 (the “116 Patent”). On September 9, 2012, CAO amended its complaint, adding claims for (1) business disparagement/injurious falsehood under common law and (2) unfair competition under 15 U.S.C. Section 1125(a). The additional claims stem from a press release that BIOLASE issued on April 30, 2012, which CAO claims contained false statements that are disparaging to CAO and its diode product. The amended complaint sought injunctive relief, treble damages, attorneys’ fees, punitive damages, and interest. Until January 24, 2018, this lawsuit was stayed in connection with United States Patent and Trademark Office proceedings relating to the 116 Patent, which proceedings ultimately culminated in a January 27, 2017 decision by the United States Court of Appeals for the Federal Circuit, affirming the findings of the Patent Trial and Appeal Board, which were generally favorable to the Company. On January 25, 2018, CAO moved for leave to file a second amended complaint to add certain claims, which filing the Company is not opposing.

On January 23, 2018, CAO filed a lawsuit against BIOLASE in the Central District of California alleging that BIOLASE’s diode lasers infringe on U.S. Patent Nos. 8,337,097, 8,834,497, 8,961,040 and 8,967,883. The complaint seeks injunctive relief, treble damages, attorneys’ fees, punitive damages, and interest.

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On January 25, 2019 (the “Effective Date”), BIOLASEentered into a settlement agreement (the “Settlement Agreement”) with CAO. Pursuant to the Settlement Agreement, CAO agreed to dismiss with prejudice the lawsuits filed by CAO against the Company in April 2012 and January 2018. In addition, CAO granted to the Company and its affiliates a non-exclusive, non-transferable (except as provided in the Settlement Agreement), royalty-free, fully-paid, worldwide license to the licensed patents for use in the licensed products and agreed not to sue the Company, its affiliates or any of its manufacturers, distributors, suppliers or customers for use of the licensed patents in the licensed products, and the parties agreed to a mutual release of claims. The Company has agreed (i) to pay to CAO, within five days of the Effective Date, $500,000 in cash, (ii) to issue to CAO, within 30 days of the Effective Date, 500,000 restricted shares of common stock of the Company (the “Stock Consideration”), and (iii) to pay to CAO, within 30 days of December 31, 2021, an amount in cash equal to the difference (if positive) between $1,000,000 and the value of the Stock Consideration on December 31, 2021. The Stock Consideration vests and becomes transferrable on December 31, 2021, subject to the terms of a restricted stock agreement to be entered into between the parties. The Company considered this a Type I subsequent event and recognized a $1.5 million contingent loss on patent litigation settlement in its statement of operations for the year ended December 31, 2018. In January 2019, the Company paid CAO $500,000 in cash. On January 31,2019, the case was dismissed with prejudice. During the three and six month periods ended June 30, 2019, the Company recordedan additional gain on patent litigation of $0.2million and $0.0million, respectively,million which represents the change in fair value of the restricted stock to be issued to CAO, resulting in a total $1.0 million accrued liability as of June 30, 2019.

NOTE 12—SEGMENT INFORMATION

The Company currently operates in a single business segment. Management uses one measurement of profitability and does not segregate its business for internal reporting. For the three and six months ended June 30, 2019, sales to customers in the United States accounted for approximately 68% and 63% of net revenue, respectively, and international sales accounted for approximately 32% and 37% of net revenue, respectively. No individual country, other than the United States, represented more than 10% of total net revenue during the three and six months ended June 30, 2019 or 2018.

Net revenue by geographic location based on the location of customers was as follows (in thousands):  

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
United States	$	5,898	$	7,164	$	12,014	$	12,857
International		2,747		4,990		6,957		9,317
	$	8,645	$	12,154	$	18,971	$	22,174

Property, plant, and equipment by geographic location was as follows (in thousands):

	June 30,		December 31,
	2019		2018
United States	$	1,290	$	1,673
International		295		302
	$	1,585	$	1,975

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NOTE 13—CONCENTRATIONS

Revenue from the Company’s products for the three and six months ended June 30, 2019 and 2018 are as follows (dollars in thousands):

	Three Months Ended								Six Months Ended
	June 30,								June 30,
	2019				2018				2019				2018
Laser systems	$	4,917	56.9	%	$	7,920	65.2	%	$	10,880	57.4	%	$	13,623	61.4	%
Imaging systems		63	0.7	%		371	3.1	%		615	3.2	%		954	4.3	%
Consumables and other		2,084	24.1	%		2,303	18.9	%		4,196	22.1	%		4,337	19.6	%
Services		1,578	18.3	%		1,557	12.8	%		3,273	17.3	%		3,254	14.7	%
License fees and royalties		3	—	%		3	—	%		7	—	%		6	—	%
Net revenue	$	8,645	100.0	%	$	12,154	100.0	%	$	18,971	100.0	%	$	22,174	100.0	%

No individual customer represented more than 10% of the Company’s total net revenue for the three and six months ended June 30, 2019 or 2018.

The Company maintains its cash and cash equivalent accounts with established commercial banks. Such cash deposits periodically exceed the Federal Deposit Insurance Corporation insured limit.

One individual customer represented more than 10% of the Company’s accounts receivable at June 30, 2019 and December 31, 2018.

The Company currently purchases certain key components of its products from single suppliers. Although there are a limited number of manufacturers of these key components, management believes that other suppliers could provide similar key components on comparable terms. A change in suppliers, however, could cause delays in manufacturing and a possible loss of sales, which could adversely affect the Company’s business, results of operations and financial condition.

NOTE 14—INCOME TAXES

The Company accounts for income taxes under the asset and liability method, whereby deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. Management evaluates the need to establish a valuation allowance for deferred tax assets based upon the amount of existing temporary differences, the period in which they are expected to be recovered, and expected levels of taxable income. A valuation allowance to reduce deferred tax assets is established when it is “more likely than not” that some or all of the deferred tax assets will not be realized. Based on the Company’s net losses in prior years, management has determined that a full valuation allowance against the Company’s net deferred tax assets is appropriate.

Accounting for uncertainty in income taxes prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return and provides guidance on de-recognition, classification, interest and penalties, accounting in interim periods, disclosure, and transition. The Company has elected to classify interest and penalties as a component of its income tax provision. With respect to the liability for unrecognized tax benefits, including related estimates of penalties and interest, the Company did not record a liability for unrecognized tax benefits for the three and six months ended June 30, 2019 and 2018. The Company does not expect any changes to its unrecognized tax benefit for the next 12 months that would materially impact its consolidated financial statements.

During the three and six months ended June 30, 2019, the Company recorded an income tax provision of $28,000 and $42,000, respectively, resulting in an effective tax rate of 0.5% and 0.3%, respectively. During the three and six months ended June 30, 2018, the Company recorded an income tax provision of $10,000 and $42,000, respectively, resulting in an effective tax rate of (10.0)% and 0.8%, respectively. The income tax provisions for the three and six months ended June 30, 2019 2018 were calculated using the discrete year-to-date method. The effective tax rate differs from the statutory tax rate of 21% primarily due to the existence of valuation allowances against net deferred tax assets and current liabilities resulting from the estimated state income tax liabilities and foreign tax liability.

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ITEM  2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following information should be read in conjunction with the unaudited consolidated financial statements and related notes of BIOLASE, Inc. (“BIOLASE”) and its consolidated subsidiaries (together with BIOLASE, the “Company,” “we,” “our,” or “us”) included elsewhere in this Quarterly Report on Form 10-Q (this “Form 10-Q”) and our audited consolidated financial statements and related notes included in the Annual Report on Form 10-K for the year ended December 31, 2018 filed with the Securities and Exchange Commission (the “SEC”) on March 8, 2019 (the “2018 Form 10-K”). In addition to historical information, this discussion and analysis contains “forward-looking statements” as defined in Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). Such forward-looking statements include statements, predictions, or expectations regarding market opportunities, our plans to expand our product line and clinical applications, plans to explore potential collaborations, statements regarding the effects of seasonality on revenue, operating expenses, anticipated use of proceeds from debt financing, anticipated cash needs, needs for additional financing, and any other statement that is not historical fact. Forward-looking statements are identified by the use of words such as “may,” “might,” “will,” “intend,” “should,” “could,” “can,” “would,” “continue,” “expect,” “believe,” “anticipate,” “estimate,” “predict,” “outlook,” “potential,” “plan,” “seek,” and similar expressions and variations or the negatives of these terms or other comparable terminology.

The forward-looking statements contained in this Form 10-Q are based on the expectations, estimates, projections, beliefs, and assumptions of our management based on information available to management as of the date on which this Form 10-Q was filed with the SEC, all of which are subject to change. Forward-looking statements are subject to risks, uncertainties, and other factors that are difficult to predict and could cause actual results to differ materially from those stated or implied by our forward-looking statements. Factors that could cause or contribute to such differences include, but are not limited to:

• global economic uncertainty and volatility in financial markets;

• inability to raise additional capital on terms acceptable to us;

• our relationships with, and the efforts of, third-party distributors;

• failure in our efforts to train dental practitioners or to overcome the hesitation of dentists and patients to adopt laser technologies;

• inconsistencies between future data and our clinical results;

• competition from other companies, including those with greater resources;

• our inability to successfully develop and commercialize enhanced or new products that remain competitive with products or alternative technologies developed by others;

• the inability of our customers to obtain third-party reimbursement for their use of our products;

• limitations on our ability to use net operating loss carryforwards;

• problems in manufacturing our products;

• warranty obligations if our products are defective;

• adverse publicity regarding our technology or products;

• adverse events to our patients during the use of our products, regardless of whether caused by our products;

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• issues with our suppliers, including the failure of our suppliers to supply us with a sufficient amount or adequate quality of materials;

• rapidly changing standards and competing technologies;

• our inability to effectively manage and implement our growth strategies;

• risks associated with operating in international markets, including potential liabilities under the Foreign Corrupt Practices Act;

• breaches of our information technology systems;

• seasonality;

• litigation, including the failure of our insurance policies to cover certain expenses relating to litigation and our inability to reach a final settlement related to certain litigations;

• disruptions to our operations at our primary facility;

• loss of our key management personnel or our inability to attract or retain qualified personnel;

• risks and uncertainties relating to acquisitions, including difficulties integrating acquired businesses successfully into our existing operations and risks of discovering previously undisclosed liabilities;

• failure to comply with the reporting obligations of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) and Section 404 of the Sarbanes-Oxley Act of 2002, as amended or maintain adequate internal control over financial reporting;

• climate change initiatives;

• failure of our intellectual property rights to adequately protect our technologies and potential third-party claims that our products infringe their intellectual property rights;

• changes in government regulation or the inability to obtain or maintain necessary governmental approvals;

• our failure to comply with existing or new laws and regulations, including fraud and abuse and health information privacy and securities laws;

• changes in the regulatory requirements of the Food and Drug Administration (“FDA”) applicable to laser products, dental devices, or both;

• recall or other regulatory action concerning our products after receiving FDA clearance or approval; and

• risks relating to ownership of our common stock, including low liquidity, low trading volume, high volatility and dilution.

Further information about factors that could materially affect the Company, including our results of operations and financial condition, is contained under “Risk Factors” in Item 1A in the 2018 Form 10-K and in Item 1A to this Form 10-Q. Except as required by law, we undertake no obligation to revise or update any forward-looking statements to reflect changed assumptions, the occurrence of anticipated or unanticipated events, new information or changes to future results over time or otherwise.

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Overview

We are a medical device company that develops, manufactures, markets, and sells laser systems in dentistry and medicine. Our products advance the practice of dentistry and medicine for patients and health care professionals. Our proprietary dental laser systems allow dentists, periodontists, endodontists, oral surgeons, and other dental specialists to perform a broad range of minimally invasive dental procedures, including cosmetic, restorative, and complex surgical applications. Our laser systems are designed to provide clinically superior results for many types of dental procedures compared to those achieved with drills, scalpels, and other conventional instruments. We have clearance from the FDA to market and sell our laser systems in the United States and also have the necessary registration to market and sell our laser systems in Canada, the European Union, and many other countries outside the United States. Additionally, our in-licensed imaging equipment and related products improve diagnoses, applications, and procedures in dentistry and medicine.

We offer two categories of laser system products: Waterlase (all-tissue) systems and Diode (soft-tissue) systems. Our flagship brand, the Waterlase, uses a patented combination of water and laser energy to perform most procedures currently performed using drills, scalpels, and other traditional dental instruments for cutting soft and hard tissue. We also offer our Diode laser systems to perform soft tissue, pain therapy, and cosmetic procedures, including teeth whitening. We have approximately 153 issued and 80 pending U.S. and international patents, the majority of which are related to Waterlase technology. From 1998 through June 30, 2019, we sold over 39,600 laser systems in over 80 countries around the world. Contained in this total are approximately 13,200 Waterlase systems, including over 8,900 Waterlase MD, MDX, Express and iPlus systems.

Business and Outlook

Our Waterlase systems precisely cut hard tissue, bone, and soft tissue with minimal or no damage to surrounding tissue and dental structures. Our Diode systems, which include the Epic system, are designed to complement our Waterlase systems, and are used only in soft tissue procedures, pain therapy, hygiene, and cosmetic applications, including teeth whitening. The Diode systems, together with our Waterlase systems, offer practitioners a broad product line with a range of features and price points.

We also manufacture and sell consumable products and accessories for our laser systems. Our Waterlase and Diode systems use disposable laser tips of differing sizes and shapes depending on the procedure being performed. We also market flexible fibers and hand pieces that dental practitioners replace at some point after initially purchasing laser systems. For our Epic systems, we sell teeth whitening gel kits.

Due to the limitations associated with traditional and alternative dental instruments, we believe there is a large market opportunity for all-tissue dental laser systems that provide superior clinical outcomes, reduce the need to use anesthesia, help reduce trauma, pain, and discomfort associated with dental procedures, and increase patient acceptance for treatment protocols.

Our strategy is to increase awareness and demand for (i) our products among dental practitioners by educating dental practitioners and patients about the clinical benefits of our product suite and (ii) our laser systems among patients by educating patients about the clinical benefits of the Waterlase and Diode systems. An important goal of ours is to increase consumables revenue by selling more single-use accessories used by dental practitioners when performing procedures using our dental laser systems. In the short term, we are striving for operating excellence through lean enterprise initiatives, with a specific focus on our sales strategy and cash flow management, coupled with optimizing our engineering capabilities to develop innovative new products.

We also seek to create value through innovation and leveraging existing technologies into adjacent medical applications. We plan to expand our product line and clinical applications by developing enhancements and transformational innovations, including new clinical solutions for dental applications and for other adjacent medical applications. In particular, we believe that our existing technologies can provide significant improvements over existing standards of care in fields including ophthalmology, otolaryngology, orthopedics, podiatry, pain management, aesthetics/dermatology, veterinary, and consumer products. We plan to continue to explore potential collaborations to apply our proprietary laser technologies with expanded FDA-cleared indications to other medical applications in the future.

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Recent Developments

On May 7, 2019, we entered into an amendment to our Credit Agreement with SWK Funding LLC to increase the total commitment in the SWK Loan, as defined and described in Part I, Item I, Note 9 – Debt, from $12.5 million to $15.0 million and to revise certain of the financial covenants. Also on May 7, 2019 in connection with such amendment, we issued warrants to purchase up to 115,175 shares of BIOLASE common stock to SWK Funding LLC and warrants to purchase up to 34,552 shares of BIOLASE common stock to Deal Partners Group. See Part I, Item I, Note 9 - Debt for additional information.

Critical Accounting Policies

The unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) which require us to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the consolidated financial statements and revenues and expenses reported during the period. Information with respect to our critical accounting policies that we believe could have the most significant effect on our reported results and require subjective or complex judgments by management is contained in Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” of the 2018 Form 10-K. There have been no significant changes during the six months ended June 30, 2019 in our critical accounting policies from those disclosed in Item 7 of the 2018 Form 10-K.

Effective May 10, 2018, the Company effectuated a one-for-five reverse stock split (the “Reverse Stock Split”). In connection with the Reverse Stock Split, the number of authorized shares of BIOLASE common stock was reduced from 200,000,000 shares to 40,000,000 shares. All prior period share and per share amounts (including exercises and closing market prices) contained in this discussion have been adjusted to reflect the impact of the Reverse Stock Split.

Results of Operations

The following table sets forth certain data from our unaudited consolidated statements of operations expressed as percentages of net revenue:

	Three Months Ended												Six Months Ended
	June 30,												June 30,
	2019						2018						2019						2018
Net revenue		8,645		100.0		%		12,154		100.0		%		18,971		100.0		%		22,174		100.0		%
Cost of revenue		5,265		60.9		%		7,846		64.6		%		12,070		63.6		%		14,833		66.9		%
Gross profit		3,380		39.1		%		4,308		35.4		%		6,901		36.4		%		7,341		33.1		%
Operating expenses:
Sales and marketing		3,272		37.9		%		4,657		38.3		%		7,151		37.8		%		8,548		38.5		%
General and administrative		2,511		29.0		%		2,969		24.4		%		4,903		25.8		%		6,006		27.1		%
Engineering and development		1,124		13.0		%		1,361		11.2		%		2,549		13.4		%		2,650		12.0		%
Change in fair value of patent litigation    settlement liability		(190	)	(2.2	)	%		—		0.0		%		—		0.0		%		—		0.0		%
Total operating expenses		6,717		77.7		%		8,987		73.9		%		14,603		77.0		%		17,204		77.6		%
Loss from operations		(3,337	)	(38.6	)	%		(4,679	)	(38.5	)	%		(7,702	)	(40.6	)	%		(9,863	)	(44.5	)	%
Non-operating loss		534		6.2		%		222		1.8		%		1,055		5.6		%		27		0.1		%
Loss before income taxes		(3,871	)	(44.8	)	%		(4,901	)	(40.3	)	%		(8,757	)	(46.2	)	%		(9,890	)	(44.6	)	%
Income tax provision		28		0.3		%		10		0.1		%		42		0.2		%		42		0.2		%
Net loss	$	(3,899	)	(45.1	)	%	$	(4,911	)	(40.4	)	%	$	(8,799	)	(46.4	)	%	$	(9,932	)	(44.8	)	%

Non-GAAP Disclosure

In addition to the financial information prepared in conformity with GAAP, we provide certain historical non-GAAP financial information. Management believes that these non-GAAP financial measures assist investors in making comparisons of period-to-period operating results and that, in some respects, these non-GAAP financial measures are more indicative of the Company’s ongoing core operating performance than their GAAP equivalents.

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Management believes that the presentation of this non-GAAP financial information provides investors with greater transparency and facilitates comparison of operating results across a broad spectrum of companies with varying capital structures, compensation strategies, derivative instruments, and amortization methods, which provides a more complete understanding of our financial performance, competitive position, and prospects for the future. However, the non-GAAP financial measures presented in this Form 10-Q have certain limitations in that they do not reflect all of the costs associated with the operations of our business as determined in accordance with GAAP. Therefore, investors should consider non-GAAP financial measures in addition to, and not as a substitute for, or as superior to, measures of financial performance prepared in accordance with GAAP. Further, the non-GAAP financial measures presented by the Company may be different from similarly named non-GAAP financial measures used by other companies.

Non-GAAP Net Loss

Management uses non-GAAP net loss (defined as net loss before interest, taxes, depreciation and amortization and stock-based compensation) in its evaluation of the Company’s core results of operations and trends between fiscal periods and believes that these measures are important components of its internal performance measurement process. Management believes that this non-GAAP financial information reflects an additional way of viewing aspects of our business that, when viewed with our GAAP results, provides a more complete understanding of factors and trends affecting our business. The following table contains a reconciliation of non-GAAP net loss to GAAP net loss attributable to common stockholders (in thousands):

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2019			2018			2019			2018
GAAP net loss attributable to common stockholders	$	(3,899	)	$	(4,911	)	$	(8,799	)	$	(9,932	)
Deemed dividend on convertible preferred stock		—			—			—			—
GAAP net loss	$	(3,899	)	$	(4,911	)	$	(8,799	)	$	(9,932	)
Adjustments:
Interest expense, net		529			35			1,007			47
Income tax provision		28			10			42			42
Depreciation and amortization		268			246			529			510
Change in fair value of patent litigation settlement    liability		(190	)		—			0			—
Stock-based and other non-cash compensation		447			557			1,204			1,258
Non-GAAP net loss	$	(2,817	)	$	(4,063	)	$	(6,017	)	$	(8,075	)

Comparison of Results of Operations

Three months ended June 30, 2019 and 2018

Net Revenue: The following table summarizes our unaudited net revenues by category, including each category’s percentage of our total revenue, for the three months ended June 30, 2019 and 2018, as well as the amount of change and percentage of change in each revenue category (dollars in thousands):

	Three Months Ended				Three Months Ended
	June 30,				June 30,				Amount			Percent
	2019				2018				Change			Change
Laser systems	$	4,917	56.9	%	$	7,920	65.2	%	$	(3,003	)		37.9
Imaging systems		63	0.7	%		371	3.1	%		(308	)		(83.0	)
Consumables and other		2,084	24.2	%		2,303	18.9	%		(219	)		(9.5	)
Services		1,578	18.2	%		1,557	12.8	%		21			1.3
Total products and services		8,642	100.0	%		12,151	100.0	%		(3,509	)		(28.9	)
License fees and royalty		3	—	%		3	—	%		—			—
Net revenue	$	8,645	100.0	%	$	12,154	100.0	%	$	(3,509	)		(28.9	)

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Typically, we experience fluctuations in revenue from quarter to quarter due to seasonality. Revenue in the first quarter typically is lower than average, and revenue in the fourth quarter typically is stronger than average, due to the buying patterns of dental practitioners. We believe that this trend exists because a significant number of dentists purchase their capital equipment towards the end of the calendar year in order to maximize their practice earnings while seeking to minimize their taxes. They often use certain tax incentives, such as accelerated depreciation methods for purchasing capital equipment, as part of their year-end tax planning. In addition, revenue in the third quarter may be affected by vacation patterns which can cause revenue to be flat or lower than in the second quarter of the year. Our historical seasonal fluctuations may also be impacted by sales promotions used by large dental distributors that encourage end-of-quarter and end-of-year buying in our industry.

The following table summarizes our unaudited net revenue by geographic location based on the location of customers for the three months ended June 30, 2019 and 2018, as well as the amount of change and percentage of change in each geographic revenue category, (dollars in thousands):

	Three Months Ended				Three Months Ended
	June 30,				June 30,				Amount			Percent
	2019				2018				Change			Change
United States	$	5,898	68.2	%	$	7,164	58.9	%	$	(1,266	)		(17.7	)
International		2,747	31.8	%		4,990	41.1	%		(2,243	)		(44.9	)
Net revenue	$	8,645	100.0	%	$	12,154	100.0	%	$	(3,509	)		(28.9	)

Total net revenue decreased by $3.5 million or 29% during the three months ended June 30, 2019 as compared to the same period in 2018. In the U.S., net revenue decreased by $1.3 million, or 17.7%, primarily from laser systems sales, which decreased by $0.9 million, or 31.0%, during the three months ended June 30, 2019 compared to the same period in 2018. Outside the U.S., net revenue declined by $2.2 million, or 44.9% during the three months ended June 30, 2019 as compared to the same period in 2018, primarily due to the decline in sales of our laser products outside the U.S. of $2.0 million, or 50.0%, during the three months ended June 30, 2019 compared to the same period in 2018. Sales of consumables and other revenue, which consists of consumable products such as disposable tips decreased by $0.3 million, or 25.5% internationally and were consistent domestically, during the three months ended June 30, 2019 as compared to the same period in 2018.

Imaging systems revenue decreased by $0.3 million or 83% during the three months ended June 30, 2019 as compared to the same period in 2018, primarily driven by our continued focus on laser sales.

Cost of Revenue and Gross Profit: The following table summarizes our unaudited cost of revenue and gross profit for the three months ended June 30, 2019 and 2018, as well as the amount of change and percentage of change (dollars in thousands):

	Three Months Ended				Three Months Ended
	June 30,				June 30,				Amount			Percent
	2019				2018				Change			Change
Net revenue	$	8,645	100.0	%	$	12,154	100.0	%	$	(3,509	)		(28.9	)
Cost of revenue		5,265	60.9	%		7,846	64.6	%		(2,581	)		(32.9	)
Gross profit	$	3,380	39.1	%	$	4,308	35.4	%	$	(928	)		(21.5	)

Gross profit as a percentage of revenue typically fluctuates with product and regional mix, selling prices, product costs and revenue levels. The 21.5% decrease in gross profit for the three months ended June 30, 2019, as compared to the three months ended June 30, 2018, reflects the decline in our laser sales.

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Operating Expenses: The following table summarizes our unaudited operating expenses for thethreemonths ended June 30, 2019 and June 30, 2018, as well as the amount of change and percentage of change (dollars in thousands):

	Three Months Ended						Three Months Ended
	June 30,						June 30,				Amount			Percent
	2019						2018				Change			Change
Sales and marketing	$	3,272		37.9		%	$	4,657	38.3	%	$	(1,385	)		(29.7	)
General and administrative		2,511		29.0		%		2,969	24.4	%		(458	)		(15.4	)
Engineering and development		1,124		13.0		%		1,361	11.2	%		(237	)		(17.4	)
Change in fair value of patent    litigation settlement liability		(190	)	(2.2	)	%		—	—	%		(190	)		(5.4	)
Total operating expenses	$	6,717		77.7		%	$	8,987	73.9	%	$	(2,270	)		(25.3	)

The quarter-over-quarter total operating expenses are explained in the following expense categories:

Sales and Marketing Expense. Sales and marketing expenses during the three months ended June 30, 2019 decreased by $1.4 million or 29.7% as compared to the same period in 2018, primarily due to a decreases in payroll and consulting related expenses of $0.8 million, convention related expenses of $0.2 million, stock-based compensation expense of $0.1 million, and sales commissions of $0.2 million. We expect sales and marketing expenses to decrease as a percentage of revenue.

General and Administrative Expense. General and administrative expenses during the three months ended June 30, 2019 decreased by $0.5 million or 15.4% compared to the same period in 2018, primarily due to a decreases in patent and legal fees of $0.2 million, in payroll and consulting related expenses of $0.2 million, and other general expenses of $0.1 million. We expect general and administrative expenses to decrease as a percentage of revenue through the remainder of 2019.

Engineering and Development Expense. Engineering and development expenses during the three months ended June 30, 2019 decreased by $0.2 million or 17.4% compared to the same period in 2018, primarily due to decreases in payroll and consulting-related expenses of $0.1 million and a decrease in operating expenses of approximately $0.1 million. We expect engineering and development expenses to decrease as a percentage of revenue through the remainder of 2019.

Change in fair value of patent litigation settlement liability. We recognized a $0.2 million gain on patent litigation settlement with CAO Group, Inc., as described in Part I, Item I, Note 11 – Commitments and Contingencies above, due to the change in fair value of the restricted stock which is pending issuance. We expect the restricted stock to be issued during the second half of 2019; however, until the shares are issued we will be required to adjust the contingent liability to match the fluctuation in our share price.

(Loss) Gain on Foreign Currency Transactions. We realized a $5,000 loss on foreign currency transactions during the three months ended June 30, 2019 compared to a $0.2 million loss on foreign currency transactions during the three months ended June 30, 2018, primarily due to exchange rate fluctuations between the U.S. dollar and Euro, as well as other foreign currencies.

Interest Expense. Interest expense during the three months ended June 30, 2019 increased by $0.5 million primarily due to the interest and amortization of debt issuance costs relating to the SWK Loan we entered into in the fourth quarter of 2018. We expect interest expense to fluctuate depending on the movement in LIBOR through the remainder of 2019.

Income Tax Provision. We use a discrete year-to-date method in calculating quarterly provision for income taxes. Our provision for income taxes was $28,000 for the three months ended June 30, 2019 as compared to a provision of $10,000 for the same period in the prior year. For additional information regarding income taxes, see Part I, Item I, Note 14 – Income Taxes.

31

Net Loss. Our net loss totaled approximately $3.9 million for the three months ended June 30, 2019 compared to a net loss of $4.9 million for the three months ended June 30, 2018.

Six months ended June 30, 2019 and 2018

Net Revenue: The following table summarizes our unaudited net revenues by category, including each category’s percentage of our total revenue, for the three months ended June 30, 2019 and 2018, as well as the amount of change and percentage of change in each revenue category (dollars in thousands):

	Six Months Ended					Six Months Ended
	June 30,					June 30,					Amount			Percent
	2019					2018					Change			Change
Laser systems	$	10,880		57.4	%	$	13,623		61.4	%	$	(2,743	)		(20.1	)	%
Imaging systems		615		3.2	%		954		4.3	%		(339	)		(35.5	)	%
Consumables and other		4,196		22.2	%		4,337		19.6	%		(141	)		(3.3	)	%
Services		3,273		17.2	%		3,254		14.7	%		19			0.6		%
Total products and services		18,964		100.0	%		22,168		100.0	%		(3,204	)		(14.5	)	%
License fees and royalty		7	—		%		6	—		%	—			—			%
Net revenue	$	18,971		100.0	%	$	22,174		100.0	%	$	(3,204	)		(14.5	)	%

The following table summarizes our unaudited net revenue by geographic location based on the location of customers for the six months ended June 30, 2019 and 2018, as well as the amount of change and percentage of change in each geographic revenue category, (dollars in thousands):

	Six Months Ended				Six Months Ended
	June 30,				June 30,				Amount			Percent
	2019				2018				Change			Change
United States	$	12,014	63.3	%	$	12,857	58.0	%	$	(843	)		(6.6	)	%
International		6,957	36.7	%		9,317	42.0	%		(2,360	)		(25.3	)	%
Net revenue	$	18,971	100.0	%	$	22,174	100.0	%	$	(3,203	)		(14.4	)	%

Total net revenue decreased by $3.2 million or 14.4% during the six months ended June 30, 2019 as compared to the same period in 2018. In the U.S., net revenue decreased by $0.8 million, or 6.6%, primarily from laser systems sales, which decreased by $0.6 million, or 10.0%, during the six months ended June 30, 2019 compared to the same period in 2018. Outside the U.S., net revenue declined by $2.4 million, or 25.3% during the six months ended June 30, 2019 as compared to the same period in 2018, primarily due to the decline in sales of our laser products outside the U.S. of $2.1 million, or 28.3%, during the six months ended June 30, 2019 compared to the same period in 2018. Sales of consumables and other revenue, which consists of consumable products such as disposable tips decreased by $0.1 million, or 3%, during the six months ended June 30, 2019 as compared to the same period in 2018.

Imaging systems revenue decreased by $0.3 million or 36.0% during the six months ended June 30, 2019 as compared to the same period in 2018, primarily driven by our continued focus on laser sales.

Cost of Revenue and Gross Profit: The following table summarizes our unaudited cost of revenue and gross profit for the for the six months ended June 30, 2019 and 2018, as well as the amount of change and percentage of change (dollars in thousands):

	Six Months Ended				Six Months Ended
	June 30,				June 30,				Amount			Percent
	2019				2018				Change			Change
Net revenue	$	18,971	100.0	%	$	22,174	100.0	%	$	(3,203	)		(14.4	)	%
Cost of revenue		12,070	63.6	%		14,833	66.9	%		(2,763	)		(18.6	)	%
Gross profit	$	6,901	36.4	%	$	7,341	33.1	%	$	(440	)		(6.0	)	%

32

Gross profit as a percentage of revenue typically fluctuates with product and regional mix, selling prices, product costs and revenue levels. The 6.0% decrease in gross profit as a percentage of revenue for the six months ended June 30, 2019, as compared to the six months ended June 30, 2018, reflects the decline in our laser sales which have a higher margin than our other product offerings.

Operating Expenses: The following table summarizes our unaudited operating expenses for the for the six months ended June 30, 2019 and June 30, 2018, as well as the amount of change and percentage of change (dollars in thousands):

	Six Months Ended					Six Months Ended
	June 30,					June 30,					Amount			Percent
	2019					2018					Change			Change
Sales and marketing	$	7,151		37.8	%	$	8,548		38.5	%	$	(1,397	)		(16.3	)	%
General and administrative		4,903		25.8	%		6,006		27.1	%		(1,103	)		(18.4	)	%
Engineering and development		2,549		13.4	%		2,650		12.0	%		(101	)		(3.8	)	%
Change in fair value of patent litigation    settlement liability	—		—		%	—		—		%	—			—			%
Total operating expenses	$	14,603		77.0	%	$	17,204		77.6	%	$	(2,601	)		(15.1	)	%

The period-over-period total operating expenses are explained in the following expense categories:

Sales and Marketing Expense. Sales and marketing expenses during the six months ended June 30, 2019 decreased by $1.4 million or 16.3% as compared to the same period in 2018, primarily due to a decreases in payroll and consulting related expenses of $1.1 million, convention related expenses of $0.1 million, and sales commissions of $0.2 million. We expect sales and marketing expenses to decrease as a percentage of revenue.

General and Administrative Expense. General and administrative expenses during the six months ended June 30, 2019 decreased by $1.1 million or 18.4% compared to the same period in 2018, primarily due to a decrease in patent and legal fees of $0.6 million, payroll and consulting related expenses of $0.3 million, and provision for bad debts of $0.1 million. We expect general and administrative expenses to decrease as a percentage of revenue through the remainder of 2019.

Engineering and Development Expense. Engineering and development expenses during the six months ended June 30, 2019 decreased by $0.1 million or 3.8% compared to the same period in 2018, primarily due to a $0.1 million decrease in payroll and consulting-related expenses. We expect engineering and development expenses to decrease as a percentage of revenue through the remainder of 2019.

(Loss) Gain on Foreign Currency Transactions. We realized a $48,000 loss on foreign currency transactions during the six months ended June 30, 2019 compared to a $20,000 gain on foreign currency transactions during the six months ended June 30, 2018, primarily due to exchange rate fluctuations between the U.S. dollar and Euro, as well as other foreign currencies.

Interest Expense. Interest expense during the six months ended June 30, 2019 increased by $1.0 million primarily due to the interest and amortization of debt issuance costs relating to the SWK Loan we entered into in the fourth quarter of 2018. We expect interest expense to fluctuate depending on the movement in LIBOR through the remainder of 2019.

Income Tax Provision. We use a discrete year-to-date method in calculating quarterly provision for income taxes. Our provision for income taxes was $42,000 for the six months ended June 30, 2019 and June 30, 2018. For additional information regarding income taxes, see Part I, Item I, Note 14 – Income Taxes.

Net Loss. Our net loss totaled approximately $8.8 million for the six months ended June 30, 2019 compared to a net loss of $9.9 million for the six months ended June 30, 2018.

33

Liquidity and Capital Resources

At June 30, 2019, we had approximately $4.0 million in cash, cash equivalents and restricted cash. Management defines cash and cash equivalents as highly liquid deposits with original maturities of 90 days or less when purchased. The decrease in our cash, cash equivalents and restricted cash of $4.3 million at June 30, 2019 as compared to December 31, 2018, was primarily due to net cash used in operating activities of $6.6 million. The $6.6 million of net cash used in operating activities was primarily driven by our net loss of $8.8 million for the six months ended June 30, 2019.

The following table summarizes our change in cash, cash equivalents and restricted cash (in thousands):

	Six Months Ended
	June 30,
	2019			2018
Net cash flows used in operating activities	$	(6,627	)	$	(8,345	)
Net cash flows used in investing activities		(125	)		(110	)
Net cash flows provided by (used in) financing activities		2,466			(269	)
Effect of exchange rate changes		(38	)		(26	)
Net change in cash, cash equivalents and restricted cash	$	(4,324	)	$	(8,750	)

Operating Activities

Net cash used in operating activities consists of our net loss, adjusted for our non-cash charges, plus or minus working capital changes. Cash used in operating activities for the six months ended June 30, 2019 totaled $6.6 million and was primarily comprised of our net loss of $8.8 million, partially offset by non-cash adjustments for depreciation and amortization expenses of $0.5 million and stock-based compensation expenses of $1.2 million, amortization of debt discount and issuance costs of $0.2 million, and provision for doubtful accounts of $0.1 million. Changes in operating assets and liabilities were $0.1 million primarily due to a decrease in accounts payable and accrued liabilities of $1.7 million related to the timing of our payments and $0.5 million paid as part of the patent litigation settlement with CAO Group, Inc., as described in Part I, Item I, Note 11 – Commitments and Contingencies above, and an decrease in accounts receivable of $1.3 million, partially offset by an increase in inventory of $0.1 million and a decrease in prepaid expenses and other current assets of $0.6 million.

Investing Activities

Cash used in investing activities for the six months ended June 30, 2019 was minimal. We expect cash flows from investing activities to remain consistent through the remainder of 2019.

Financing Activities

Net cash provided by financing activities for the six months ended June 30, 2019 increased by $2.7 million as compared to the same period in 2018, primarily due to the additional commitment on the SWK Loan of $2.5 million that occurred on May 7, 2019, partially offset by payments of debt issuance costs of $38,000.

Effect of Exchange Rate

The effect of exchange rate on cash for the six months ended June 30, 2019 was $38,000 and primarily due to fluctuations between the U.S. Dollar and the Euro.

Future Liquidity Needs

As of June 30, 2019, we had working capital of approximately $13.8 million. Our principal sources of liquidity as of June 30, 2019 consisted of approximately $4.0 million in cash, cash equivalents and restricted cash and $9.7 million of net accounts receivable.

34

On November 9, 2018, BIOLASE entered into a five-year secured Credit Agreement (the “Credit Agreement”) with SWK, pursuant to which BIOLASE has borrowed $12.5 million (the “SWK Loan”). $0.9 million of the proceeds from the SWK Loan have been used to pay off all amounts owed to Western Alliance Bank under the Business Financing Agreement (as amended on October 26, 2018), and we plan to use the remaining proceeds to provide additional working capital to fund its growth initiatives, such as broadening its customer base and increasing the utilization of its products to drive recurring higher margin consumables revenue.

As of March 31, 2019, we were not in compliance with certain covenants in the Credit Agreement. In May 2019, SWK granted the Company a waiver of such covenants. On May 7, 2019, we entered into an amendment to the Credit Agreement with SWK to increase our total commitment in the SWK Loan from $12.5 million to $15.0 million and to revise certain of the financial covenants to (a) adjust minimum revenue and EBITDA levels, (b) to require us to have a shelf registration statement declared effective by the SEC before September 30, 2019, with a proposed maximum aggregate offering price of at least $10.0 million, if we do not reach set minimum revenue levels for the three-month period ended June 30, 2019, and (c) require us to maintain minimum liquidity of $1.5 million at all times and if aggregate minimum revenue and EBITDA levels are not achieved by September 30, 2019, the minimum liquidity requirement will be increased to $3.0 million, until we have obtained additional equity or debt funding of no less than $5.0 million.

In connection with the amendment, we paid to SWK loan origination and other fees of approximately $0.2 million payable in cash and approximately $0.3 million warrants to purchase shares of BIOLASE common stock. We also paid an additional finder’s fee to DPG, as defined and described in Note 9 to the unaudited consolidated financial statements of approximately $0.1 million in cash and $0.1 million in warrants to purchase shares of BIOLASE common stock.

In order for us to continue operations beyond the next 12 months and be able to discharge our liabilities and commitments in the normal course of business, we must increase sales of our products directly to end-users and through distributors, establish profitable operations through the combination of increased sales and decreased expenses, generate cash from operations or obtain additional funds when needed. We intend to improve our financial condition and ultimately improve our financial results by increasing revenues through expansion of our product offerings, continuing to expand and develop our fields sales force and distribution relationships both domestically and internationally, forming strategic arrangements within the dental and medical industries, educating dental and medical patients as to the benefits of our advanced medical technologies, and reducing expenses. Additional capital requirements may depend on many factors, including, among other things, continued losses, the rate at which our business grows, demands for working capital, manufacturing capacity, and any acquisitions that we may pursue. From time to time, we could be required, or may otherwise attempt, to raise capital, through either equity or debt offerings, or enter into another line of credit facility. We may not be able to successfully consummate any equity or debt financings or enter into any other line of credit facility in the future or that the required capital would be available on acceptable terms, if at all, or that any such financing activity would not be dilutive to our stockholders.

Recent Accounting Pronouncements

For a description of recently issued and adopted accounting pronouncements, including the respective dates of adoption and expected effects on our results of operations and financial condition, please refer to Part I, Item 1, Note 2 – Summary of Significant Accounting Policies, which is incorporated herein by this reference.

Additional Information

BIOLASE^®, ZipTip^®, ezlase^®, eztips^®, ComfortPulse^®, Waterlase^®, Waterlase Dentistry^®, Waterlase Express^®, iLase^®, iPlus^®, Epic^®, Epic Pro^®, WCLI^®, World Clinical Laser Institute^®, Waterlase MD^®, Waterlase Dentistry^®, and EZLase^® are registered trademarks of BIOLASE, and Pedolase™ is a trademark of BIOLASE. All other product and company names are registered trademarks or trademarks of their respective owners.

35

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

None.

ITEM 4. CONTROLS AND PROCEDURES

Disclosure Controls and Procedures

Under the supervision and with the participation of our management, including our principal executive officer and principal financial officer, we conducted an evaluation of the effectiveness of the design and operation of our disclosure controls and procedures, as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act, as of the end of the period covered by this report (the “Evaluation Date”). Based on this evaluation, our principal executive officer and principal financial officer concluded as of the Evaluation Date that our disclosure controls and procedures were effective such that the information relating to the Company, including our consolidated subsidiaries, required to be disclosed in our SEC reports (i) is recorded, processed, summarized and reported within the time periods specified in SEC rules and forms and (ii) is accumulated and communicated to the Company’s management, including our principal executive officer and principal financial officer, as appropriate to allow timely decisions regarding required disclosure.

Under the supervision and with the participation of our management, including our principal executive officer and principal financial officer, we conducted an evaluation of any changes in our internal control over financial reporting (as such term is defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) that occurred during our most recently completed fiscal quarter. Based on that evaluation, our principal executive officer and principal financial officer concluded that there has not been any change in our internal control over financial reporting during the quarter that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

PART II. OTHER INFORMATION

ITEM1. LEGAL PROCEEDINGS

The disclosure contained in Part I, Item 1, Note 11 – Commitments and Contingencies is hereby incorporated herein by reference.

ITEM  1A. RISK FACTORS

There have been no material changes to the risk factors as disclosed in Part I, Item 1A “Risk Factors” in the 2018 Form 10-K.

36

ITEM 6. EXHIBITS

			Incorporated by Reference
Exhibit	Description	Filed Herewith	Form	Period Ending/Date of Report	Exhibit	Filing Date
3.1.1	Restated Certificate of Incorporation, including, (i) Certificate of Designations, Preferences and Rights of 6% Redeemable Cumulative Convertible Preferred Stock of the Registrant; (ii) Certificate of Designations, Preferences and Rights of Series A 6% Redeemable Cumulative Convertible Preferred Stock of the Registrant; (iii) Certificate of Correction Filed to Correct a Certain Error in the Certificate of Designation of the Registrant; and (iv) Certificate of Designations of Series B Junior Participating Cumulative Preferred Stock of the Registrant.		S-1, Amendment No. 1	12/23/2005	3.1	12/23/2005
3.1.2	Amendment to Restated Certificate of Incorporation		8-K	05/10/2012	3.1	05/16/2012
3.1.3	Second Amendment to Restated Certificate of Incorporation		8-A/A	11/04/2014	3.1.3	11/04/2014
3.1.4	Third Amendment to Restated Certificate of Incorporation		S-3	07/21/2017	3.4	07/21/2017
3.1.5	Fourth Amendment to Restated Certificate of Incorporation		8-K	05/10/2018	3.1	05/11/2018
3.1.6	Certificate of Elimination of Series B Junior Participating Cumulative Preferred Stock		8-K	11/10/2015	3.1	11/12/2015
3.1.7	Certificate of Designations, Preferences and Rights of Series C Participating Convertible Preferred Stock of the Registrant		8-K	08/08/2016	3.1	08/08/2016
3.1.8	Certificate of Elimination of Series C Participating Convertible Preferred Stock of the Registrant		8-K	04/18/2017	3.1	04/20/2017
3.1.9	Certificate of Designations, Preferences and Rights of Series D Participating Convertible Preferred Stock of the Registrant		8-K	04/18/2017	3.2	04/20/2017
3.2	Seventh Amended and Restated Bylaws of the Registrant, adopted on October 8, 2018		8-K	10/08/2018	3.1	10/09/2018
4.1	Form of Warrant Issued on November 7, 2014		8-K	11/03/2014	99.1	11/07/2014

37

			Incorporated by Reference
Exhibit	Description	Filed Herewith	Form	Period Ending/Date of Report	Exhibit	Filing Date
4.2	Form of Warrant issued on August 8, 2016		8-K	08/01/2016	99.1	08/02/2016
4.3	Form of Warrant issued April 18, 2017		DEF14A		D	05/19/2017
4.4	Warrant to Purchase Stock issued on March 6, 2018 to Western Alliance Bank		10-K	12/31/2017	4.4	03/14/2018
4.5	Warrant to Purchase Stock issued on September 27, 2018 to Western Alliance Bank		10-Q	09/30/2018	4.1	11/14/2018
4.6	Warrant to Purchase Stock issued on September 27, 2018 to SWK Funding, LLC		10-Q	09/30/2019	4.2	11/14/2018
4.7	Warrant to Purchase Stock issued on May 7, 2019 to SWK Funding, LLC		10-Q	3/31/2019	4.7	5/10/2019
4.8	First Amendment to Credit Agreement, dated as of May 7, 2019, by and between the Registrant and SWK Funding LLC		10-Q	3/31/2019	10.8	5/10/2019
31.1	Certification of Chief Executive Officer pursuant to Rule 13a-14 and Rule 15d-14(a) of the Securities Exchange Act of 1934, as amended	X
31.2	Certification of Chief Financial Officer pursuant to Rule 13a-14 and Rule 15d-14(a) of the Securities Exchange Act of 1934, as amended	X
32.1	Certification of Chief Executive Officer pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002	**
32.2	Certification of Chief Financial Officer pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002	**
101	The following unaudited financial information from the Company’s Quarterly Report on Form 10-Q, for the period ended June 30, 2019, formatted in XBRL (Extensible Business Reporting Language): (i) Consolidated Balance Sheets, (ii) Consolidated Statements of Operations and Comprehensive Loss, (iii) Consolidated Statements of Cash Flows, (iv) Notes to Consolidated Financial Statements	X

* Compensatory contract or arrangement.

** Furnished herewith.

38

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

		BIOLASE, INC.
		(Registrant)
August 9, 2019	By:	/s/ Todd A. Norbe
Date		Todd A. Norbe
		President and Chief Executive Officer
			(Principal Executive Officer)
August 9, 2019	By:	/s/ JOHN R. BEAVER
Date		John R. Beaver
		Executive Vice President and Chief Financial Officer
			(Principal Financial Officer and
			Principal Accounting Officer)

39

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Todd A. Norbe, certify that:

1. I have reviewed this quarterly report on Form 10-Q for the period ended June 30, 2019 of BIOLASE, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. I have disclosed, based on my most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: August 9, 2019	By:	/s/ Todd a. Norbe
		Todd A. Norbe
		President and Chief Executive Officer (Principal Executive Officer)

EX-31.2

Exhibit 31.2

CERTIFICATION

I, John R. Beaver, certify that:

1. I have reviewed this quarterly report on Form 10-Q for the period ended June 30, 2019 of BIOLASE, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. I have disclosed, based on my most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: August 9, 2019	By:	/s/ JOHN R. BEAVER
		John R. Beaver
		Executive Vice President and Chief Financial Officer (Principal Financial Officer and Principal Accounting Officer)

EX-32.1

Exhibit 32.1

CERTIFICATION OF THE CHIEF EXECUTIVE OFFICER

PURSUANT TO 18 U.S.C. § 1350

AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of BIOLASE, Inc. (the “Company”) on Form 10-Q for the quarter ended June 30, 2019 (the “Report”), I, Todd A. Norbe, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge:

(i) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, and

(ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: August 9, 2019	By:	/s/ TODD A. NORBE
		Todd A. Norbe
		President and Chief Executive Officer (Principal Executive Officer)

EX-32.2

Exhibit 32.2

CERTIFICATION OF THE CHIEF financial OFFICER

PURSUANT TO 18 U.S.C. § 1350

AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of BIOLASE, Inc. (the “Company”) on Form 10-Q for the quarter ended June 30, 2019 (the “Report”), I, John R. Beaver, Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge:

(i) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, and

(ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: August 9, 2019	By:	/s/ JOHN R. BEAVER
		John R. Beaver
		Executive Vice President and Chief Financial Officer
		(Principal Financial Officer and Principal Accounting Officer)

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Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2019	Aug. 07, 2019
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Trading Symbol	BIOL
Entity Registrant Name	BIOLASE, INC
Entity Central Index Key	0000811240
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		21,866,197
Entity Current Reporting Status	Yes
Entity File Number	001-36385
Entity Tax Identification Number	870442441
Entity Address, Address Line One	4 Cromwell
Entity Address, City or Town	Irvine
Entity Address, State or Province	California
Entity Address, Postal Zip Code	92618
City Area Code	949
Local Phone Number	361-1200

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Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 3,720	$ 8,044
Restricted cash	312	312
Accounts receivable, less allowance of $952 and $850 in 2019 and 2018, respectively	9,740	11,112
Inventory	12,334	12,248
Prepaid expenses and other current assets	952	1,591
Total current assets	27,058	33,307
Property, plant, and equipment, net	1,585	1,975
Goodwill	2,926	2,926
Other assets	793	308
Total assets	32,362	38,516
Current liabilities:
Accounts payable	5,878	5,953
Accrued liabilities	4,899	7,538
Deferred revenue, current portion	2,513	2,476
Total current liabilities	13,290	15,967
Deferred income taxes, net	72	77
Warranty accrual	735	447
Other liabilities	1,145	100
Term loan	13,328	10,836
Total liabilities	28,570	27,427
Commitments and contingencies — Note 11
Stockholders' equity:
Preferred stock, par value $0.001 per share; 1,000 shares authorized; 0 shares issued and outstanding as of June 30, 2019 and December 31, 2018, respectively
Common stock, par value $0.001 per share; 40,000 shares authorized, 21,866 and 21,072 shares issued and outstanding as of June 30, 2019 and December 31, 2018, respectively	22	21
Additional paid-in-capital	229,972	228,430
Accumulated other comprehensive loss	(711)	(670)
Accumulated deficit	(225,491)	(216,692)
Total stockholders' equity	3,792	11,089
Total liabilities and stockholders' equity	$ 32,362	$ 38,516

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Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Statement Of Financial Position [Abstract]
Allowance for accounts receivable	$ 952	$ 850
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	1,000	1,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	40,000	40,000
Common stock, shares issued	21,866	21,072
Common stock, shares outstanding	21,866	21,072

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Consolidated Statements Of Operations And Comprehensive Loss (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Net revenue	$ 8,645	$ 12,154	$ 18,971	$ 22,174
Cost of revenue	5,265	7,846	12,070	14,833
Gross profit	3,380	4,308	6,901	7,341
Operating expenses:
Sales and marketing	3,272	4,657	7,151	8,548
General and administrative	2,511	2,969	4,903	6,006
Engineering and development	1,124	1,361	2,549	2,650
Change in fair value of patent litigation settlement liability	(190)
Total operating expenses	6,717	8,987	14,603	17,204
Loss from operations	(3,337)	(4,679)	(7,702)	(9,863)
Loss (gain) on foreign currency transactions	5	187	48	(20)
Interest expense	529	35	1,007	47
Non-operating loss, net	534	222	1,055	27
Loss before income tax provision	(3,871)	(4,901)	(8,757)	(9,890)
Income tax provision	28	10	42	42
Net loss	(3,899)	(4,911)	(8,799)	(9,932)
Other comprehensive income item:
Foreign currency translation adjustment	14	(118)	(41)	(34)
Comprehensive loss	(3,885)	(5,029)	(8,840)	(9,966)
Net loss attributable to common stockholders	$ (3,899)	$ (4,911)	$ (8,799)	$ (9,932)
Net loss per share:
Basic	$ (0.18)	$ (0.24)	$ (0.41)	$ (0.48)
Diluted	$ (0.18)	$ (0.24)	$ (0.41)	$ (0.48)
Shares used in the calculation of net loss per share:
Basic	21,595	20,538	21,366	20,504
Diluted	21,595	20,538	21,366	20,504

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Consolidated Statements Of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock and Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit
Beginning balance at Dec. 31, 2017	$ 29,260	$ 225,012	$ (576)	$ (195,177)
Issuance of common stock upon exercise of options		2
Stock offering costs		(38)
Stock-based compensation expense		1,133
Other comprehensive (loss) income			(34)
Net loss	(9,932)			(9,932)
Ending balance at Jun. 30, 2018	20,390	226,109	(610)	(205,109)
Beginning balance at Mar. 31, 2018	24,937	225,626	(492)	(200,198)
Stock-based compensation expense		483
Other comprehensive (loss) income			(118)
Net loss	(4,911)			(4,911)
Ending balance at Jun. 30, 2018	20,390	226,109	(610)	(205,109)
Beginning balance at Dec. 31, 2018	11,089	228,451	(670)	(216,692)
Issuance of common stock upon exercise of options		3
Liability award settlement		209
Stock-based compensation expense		1,122
Other comprehensive (loss) income			(41)
Net loss	(8,799)			(8,799)
Warrants issued in connection with debt instruments		209
Ending balance at Jun. 30, 2019	3,792	229,994	(711)	(225,491)
Beginning balance at Mar. 31, 2019	6,973	229,290	(725)	(221,592)
Liability award settlement		7
Stock-based compensation expense		488
Other comprehensive (loss) income			14
Net loss	(3,899)			(3,899)
Warrants issued in connection with debt instruments		209
Ending balance at Jun. 30, 2019	$ 3,792	$ 229,994	$ (711)	$ (225,491)

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Consolidated Statements Of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash Flows from Operating Activities:
Net loss	$ (8,799)	$ (9,932)
Adjustments to reconcile net loss to net cash and cash equivalents used in operating activities:
Depreciation and amortization	529	509
Provision for bad debts	111	230
Provision for inventory excess and obsolescence		59
Amortization of discounts on lines of credit	109	17
Amortization of debt issuance costs	86	25
Stock-based compensation	1,204	1,258
Deferred income taxes	(5)	2
Earned interest income		(1)
Changes in operating assets and liabilities:
Accounts receivable	1,263	(504)
Inventory	(86)	(1,769)
Prepaid expenses and other current assets	644	105
Accounts payable and accrued liabilities	(1,720)	2,074
Deferred revenue	37	(418)
Net cash and cash equivalents used in operating activities	(6,627)	(8,345)
Cash Flows from Investing Activities:
Purchases of property, plant, and equipment	(125)	(110)
Net cash and cash equivalents used in investing activities	(125)	(110)
Cash Flows from Financing Activities:
Principal payments under capital lease obligation		(46)
Borrowings under line of credit		1,823
Payments under line of credit		(1,823)
Borrowings under term loan	2,500
Payments of debt issuance costs	(38)	(87)
Payments of equity offering costs		(138)
Proceeds from exercise of stock options	4	2
Net cash and cash equivalents provided by (used in) financing activities	2,466	(269)
Effect of exchange rate changes	(38)	(26)
Decrease in cash, cash equivalents and restricted cash	(4,324)	(8,750)
Cash, cash equivalents and restricted cash, beginning of period	8,356	11,896
Cash, cash equivalents and restricted cash, end of period	4,032	3,146
Supplemental cash flow disclosure:
Cash paid for interest	831
Cash paid for income taxes	12	$ 15
Cash paid for operating leases	414
Non-cash accrual for capital expenditures	17
Non-cash right-of-use assets obtained in exchange for lease obligation	824
Warrants issued in connection with debt instruments	$ 209

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Description of Business and Basis of Presentation

6 Months Ended

Jun. 30, 2019

Accounting Policies [Abstract]

Description of Business and Basis of Presentation

NOTE 1—DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION

The Company

BIOLASE, Inc. (“BIOLASE” and, together with its consolidated subsidiaries, the “Company”) is a medical device company that develops, manufactures, markets, and sells laser systems in dentistry and medicine and also markets, sells, and distributes dental imaging equipment, including three-dimensional CAD/CAM intra-oral scanners and digital dentistry software.

Basis of Presentation

The unaudited consolidated financial statements include the accounts of BIOLASE and its wholly-owned subsidiaries and have been prepared on a basis consistent with the December 31, 2018 audited consolidated financial statements and include all material adjustments, consisting of normal recurring adjustments and the elimination of all material intercompany transactions and balances, necessary to fairly present the information set forth therein. These unaudited, interim, consolidated financial statements do not include all the footnotes, presentations, and disclosures normally required by accounting principles generally accepted in the United States of America (“GAAP”) for complete consolidated financial statements.

The consolidated results of operations for the three and six months ended June 30, 2019 are not necessarily indicative of the results for the full year. The accompanying consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto for the year ended December 31, 2018, included in BIOLASE’s Annual Report on Form 10-K for the year ended December 31, 2018 filed with the Securities and Exchange Commission (the “SEC”) on March 8, 2019 (the “2018 Form 10-K”).

Liquidity and Management’s Plans

The Company incurred a loss from operations and a net loss, and used cash in operating activities for the three and six months ended June 30, 2019. The Company’s recurring losses, level of cash used in operations, and potential need for additional capital, along with uncertainties surrounding the Company’s ability to raise additional capital, raise substantial doubt about the Company’s ability to continue as a going concern. The financial statements do not include any adjustments that might be necessary if the Company is unable to continue as a going concern.

As of March 31, 2019, the Company was not in compliance with certain of its loan covenants relating to the SWK Loan (as defined below). In May 2019, SWK Funding, LLC granted the Company a waiver of such covenants. On May 7, 2019, the Company entered into an amendment of its Credit Agreement with SWK Funding, LLC to increase the total loan commitment in the SWK Loan from $12.5 million to $15.0 million, to revise certain of the financial covenants and to issue additional warrants to purchase the Company’s common stock. See Note 9 for additional information.

As of June 30, 2019, the Company had working capital of approximately $13.8 million. The Company’s principal sources of liquidity as of June 30, 2019 consisted of approximately $4.0 million in cash, cash equivalents and restricted cash and $9.7 million of accounts receivable.  

In order for the Company to continue operations beyond the next 12 months and be able to discharge its liabilities and commitments in the normal course of business, it must sell its products directly to end users and through distributors, establish profitable operations through increased sales, decrease expenses, generate cash from operations, or obtain additional funds when needed. The Company intends to improve its financial condition and ultimately improve its financial results by increasing revenues through expansion of its product offerings, continuing to expand and develop its field sales force and distributor relationships both domestically and internationally, forming strategic arrangements within the dental and medical industries, educating dental and medical patients as to the benefits of its advanced medical technologies, and reducing expenses.

Additional capital requirements may depend on many factors, including, among other things, continued losses, the rate at which the Company’s business grows, demands for working capital, manufacturing capacity, and any acquisitions that the Company may pursue. From time to time, the Company could be required, or may otherwise attempt, to raise capital, through either equity or debt offerings, or enter into an additional line of credit facility.

Reverse Stock Split

Except as the context otherwise requires, all share numbers and share price amounts (including exercise prices and closing market prices) contained in the unaudited financial statements and notes thereto reflect the one-for-five reverse stock split (“the Reverse Stock Split”) effectuated by the Company on May 10, 2018. See Note 4 below for additional information.

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Summary of Significant Accounting Policies

6 Months Ended

Jun. 30, 2019

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

NOTE 2—SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Use of Estimates

The preparation of these unaudited consolidated financial statements in conformity with GAAP requires the Company to make estimates and assumptions that affect amounts reported in the consolidated financial statements and the accompanying notes. Significant estimates in these unaudited consolidated financial statements include allowances on accounts receivable, inventory, and deferred taxes, as well as estimates for accrued warranty expenses, goodwill and the ability of goodwill to be realized, revenue deferrals, effects of stock-based compensation and warrants, contingent liabilities, and the provision or benefit for income taxes. Due to the inherent uncertainty involved in making estimates, actual results reported in future periods may differ materially from those estimates.

Critical Accounting Policies

Information with respect to the Company’s critical accounting policies, which management believes could have the most significant effect on the Company’s reported results and require subjective or complex judgments by management is contained in Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” of the 2018 Form 10-K. Management believes that there have been no significant changes during the six months ended June 30, 2019 in the Company’s critical accounting policies from those disclosed in Item 7 of the 2018 Form 10-K.

Fair Value of Financial Instruments

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants in the principal market (or, if none exists, the most advantageous market) for the specific asset or liability at the measurement date (referred to as the “exit price”). The fair value is based on assumptions that market participants would use, including a consideration of non-performance risk. Under the accounting guidance for fair value hierarchy, there are three levels of measurement inputs. Level 1 inputs are quoted prices in active markets for identical assets or liabilities. Level 2 inputs are observable, either directly or indirectly. Level 3 inputs are unobservable due to little or no corroborating market data.

The Company’s financial instruments, consisting of cash, cash equivalents, restricted cash, accounts receivable, accounts payable, accrued liabilities, and the SWK Loan as discussed in Note 9, approximate fair value because of the liquid or short-term nature of these items.

Concentration of Credit Risk, Interest Rate Risk and Foreign Currency Exchange Rate

Financial instruments which potentially expose the Company to a concentration of credit risk consist principally of cash and cash equivalents, restricted cash, and trade accounts receivable. The Company maintains its cash and cash equivalents and restricted cash with established commercial banks. At times, balances may exceed federally insured limits. To minimize the risk associated with trade accounts receivable, management performs ongoing credit evaluations of customers’ financial condition and maintains relationships with the Company’s customers that allow management to monitor current changes in business operations so the Company can respond as needed. The Company does not, generally, require customers to provide collateral before it sells them its products. However, the Company has required certain distributors to make prepayments for significant purchases of products.

Substantially all of the Company’s revenue is denominated in U.S. dollars, including sales to international distributors. Only a small portion of its revenue and expenses is denominated in foreign currencies, principally the Euro and Indian Rupee. The Company’s foreign currency expenditures primarily consist of the cost of maintaining offices, consulting services, and employee-related costs. During the six-month periods ended June 30, 2019 and 2018, the Company did not enter into any hedging contracts. Future fluctuations in the value of the U.S. dollar may affect the price competitiveness of the Company’s products outside the U.S.

Recent Accounting Pronouncements

Changes to GAAP are established by the Financial Accounting Standards Board (the “FASB”) in the form of accounting standards updates (“ASUs”) to the FASB’s Accounting Standards Codification.

The Company considers the applicability and impact of all ASUs. ASUs not listed below were assessed and determined not to be applicable or are expected to have minimal impact on the Company’s consolidated financial position and results of operations.

Adopted Accounting Pronouncements

In February 2016, the FASB established ASU Topic 842 – Leases, by issuing ASU Topic No. 2016-02 (“Topic 842”), which requires lessees to recognize lease on-balance sheet and disclose key information about leasing arrangements. Topic 842 was subsequently amended by ASU Topic 2018-11 – Targeted Improvements. The new standard establishes a right-of-use model (“ROU”) that requires a lessee to recognize a ROU asset and a lease liability for all leases with a term longer than 12 months. Leases will be classified as finance or operating, with classification affecting the pattern and classification of expense recognition in the statement of operations.

The Company adopted Topic 842 in the first quarter of 2019 utilizing the modified retrospective transition method and a cumulative effect adjustment at the beginning of the first quarter of 2019. The Company has elected the package of practical expedients, which allows the Company not to reassess (1) whether any expired or existing contracts as of the adoption date are or contain a lease, (2) lease classification for any expired or existing leases as of the adoption date, and (3) initial direct costs for any existing leases as of the adoption date. The Company did not elect to apply the hindsight practical expedient when determining lease term and assessing impairment of the right-to-use assets. The adoption of Topic 842 resulted in the recognition of right-of use assets of approximately $0.8 million after a $0.2 million adjustment for deferred rent, and lease liabilities for operating leases of approximately $1.0 million, and no cumulative effect adjustment on retained earnings on its unaudited Consolidated Balance Sheets nor material impact to its unaudited Consolidated Statements of Operations and Comprehensive Loss in the period of adoption. Right-of-use assets are included in Other assets, and lease liabilities are included in Accrued liabilities or Other liabilities in the unaudited consolidated balance sheet for the period ended June 30, 2019. See Note 10 for additional information.

Recently Issued Accounting Standards

In June 2016, the FASB issued a new standard to replace the incurred loss impairment methodology under current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. The Company will be required to use a forward-looking expected credit loss model for accounts receivables, loans, and other financial instruments. Credit losses relating to available-for-sale debt securities will also be recorded through an allowance for credit losses rather than as a reduction in the amortized cost basis of the securities. The standard will be effective for the Company beginning January 1, 2020, with early adoption permitted beginning January 1, 2019. The Company is currently evaluating the impact of this standard on the Company’s consolidated financial statements, including accounting policies, processes, and systems.

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Revenue Recognition

6 Months Ended

Jun. 30, 2019

Revenue Recognition [Abstract]

Revenue Recognition

NOTE 3 – REVENUE RECOGNITION

Contracts with Customers

Revenue for sales of products and services is derived from contracts with customers. The products and services promised in customer contracts include delivery of laser systems, imaging systems, and consumables as well as certain ancillary services such as training and extended warranties. Contracts with each customer generally state the terms of the sale, including the description, quantity and price of each product or service. Payment terms are stated in the contract and vary according to the arrangement. Because the customer typically agrees to a stated rate and price in the contract that does not vary over the life of the contract, the Company’s contracts do not contain variable consideration. The Company establishes a provision for estimated warranty expense.

Performance Obligations

At contract inception, the Company assesses the products and services promised in its contracts with customers. The Company then identifies performance obligations to transfer distinct products or services to the customers. In order to identify performance obligations, the Company considers all of the products or services promised in contracts regardless of whether they are explicitly stated or are implied by customary business practices.

Revenue from products and services transferred to customers at a single point in time accounted for 81% and 82% of net revenue for the three and six months ended June 30, 2019, respectively, and 87% and 85% for the three and six months ended June 30, 2018, respectively. The majority of the Company’s revenue recognized at a point in time is for the sale laser systems, imaging systems, and consumables. Revenue from these contracts is recognized when the customer is able to direct the use of and obtain substantially all of the benefits from the product which generally coincides with title transfer during the shipping process.

Revenue from services transferred to customers over time accounted for 19% and 18% of net revenue for the three and six months ended June 30, 2019, respectively, and 13% and 15% for the three and six months ended June 30, 2018, respectively. The majority of the Company’s revenue that is recognized over time relates to product training and extended warranties. Deferred revenue attributable to undelivered elements, which primarily consists of product training, totaled approximately $0.6 million and $0.7 million as of June 30, 2019 and December 31, 2018, respectively.

Transaction Price Allocation

The transaction price for a contract is allocated to each distinct performance obligation and recognized as revenue when, or as, each performance obligation is satisfied. For contracts with multiple performance obligations, the Company allocates the contract’s transaction price to each performance obligation using the best estimate of the standalone selling price of each distinct good or service in a contract. The primary method used to estimate standalone selling price is the observable price when the good or service is sold separately in similar circumstances and to similar customers.

Significant Judgments

Revenue is recorded for extended warranties over time as the customer benefits from the warranty coverage. This revenue will be recognized equally throughout the contract period as the customer receives benefits from the Company's promise to provide such services. Revenue is recorded for product training as the customer attends a training program or upon the expiration of the obligation, which is generally after nine months.

The Company also has contracts that include both the product sales and product training as performance obligations. In those cases, the Company records revenue for product sales at the point in time when the product has been shipped. The customer obtains control of the product when it is shipped, as all shipments are made FOB shipping point, and after the customer selects its shipping method and pays all shipping costs and insurance. The Company has concluded that control is transferred to the customer upon shipment.

Accounts Receivable

Accounts receivable are stated at estimated net realizable value. The allowance for bad debts is based on an analysis of customer accounts and the Company’s historical experience with accounts receivable write-offs.

Contract Liabilities

The Company performs its obligations under a contract with a customer by transferring products and/or services in exchange for consideration from the customer. The Company typically invoices its customers as soon as control of an asset is transferred and a receivable for the Company is established. The Company, however, recognizes a contract liability when a customer prepays for goods and/or services and the Company has not transferred control of the goods and/or services. The opening and closing balances of the Company’s contract liabilities are as follows (in thousands):

	June 30,		December 31,
	2019		2018
Undelivered elements (training, installation, product and    support services)	$	563	$	730
Extended warranty contracts		1,945		1,735
Deferred royalties		5		11
Total deferred revenue		2,513		2,476
Less long-term portion of deferred revenue		—		—
Deferred revenue — current	$	2,513	$	2,476

The balance of contract assets was immaterial as the Company did not have a significant amount of uninvoiced receivables at June 30, 2019 and December 31, 2018.

The amount of revenue recognized during the six-month period ended June 30, 2019 and June 30, 2018, and included in the opening contract liability balance related to undelivered elements was $0.3 million and $0.6 million, respectively. The amount of revenue recognized during the six-month period ended June 30, 2019 and June 30, 2018 related to extended warranty contracts was $0.4 million and $0.7 million respectively. Revenue recognized during 2018 and 2019 relating to deferred royalties was not material in either period.

Disaggregation of Revenue

The Company disaggregates revenue from contracts with customers into geographical regions and by the timing of when goods and services are transferred. The Company determined that disaggregating revenue into these categories depicts how the nature, amount, timing and uncertainty of revenue and cash flows are affected by regional economic factors.

The Company’s revenues related to the following geographic areas were as follows for the periods indicated (in thousands):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
United States	$	5,898	$	7,164	$	12,014	$	12,857
International		2,747		4,990		6,957		9,317
	$	8,645	$	12,154	$	18,971	$	22,174

Information regarding revenues disaggregated by the timing of when goods and services are transferred is as follows (in thousands):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
Revenue recognized over time	$	1,646	$	1,557	$	3,415	$	3,254
Revenue recognized at a point in time		6,999		10,597		15,556		18,920
Total	$	8,645	$	12,154	$	18,971	$	22,174

The Company’s sales by end market were as follows for the periods indicated (in thousands):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
End-customer	$	5,553	$	7,675	$	11,254	$	13,712
Distributors		3,092		4,479		7,717		8,462
	$	8,645	$	12,154	$	18,971	$	22,174

The Company acts as the principal in all its imaging equipment distribution sales. The Company takes possession and control of the equipment before they are sold and transferred to the customer. The Company provides the equipment and any related services directly to the customer. The Company has inventory risk before the equipment is transferred to a customer. The Company purchases and obtains the goods before obtaining a contract with a customer. The Company also has discretion in establishing the price sold to the customer for the equipment.

The percentages of the Company’s sales by product line were as follows for the periods indicated:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2019			2018			2019			2018
Laser systems		56.9	%		65.2	%		57.4	%		61.4	%
Imaging systems		0.7	%		3.1	%		3.2	%		4.3	%
Consumables and other		24.2	%		18.9	%		22.2	%		19.6	%
Services		18.2	%		12.8	%		17.2	%		14.7	%
License fees and royalties		—	%		—	%		—	%		—	%
		100.0	%		100.0	%		100.0	%		100.0	%

Shipping and Handling Costs and Revenues

Shipping and freight costs are treated as fulfillment costs. For shipments to end-customers, the customer bears the shipping and freight costs and has control of the product upon shipment. For shipments to distributors, the distributor bears the shipping and freight costs, including insurance, tariffs and other import/export costs.

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Stockholders' Equity

6 Months Ended

Jun. 30, 2019

Equity [Abstract]

Stockholders' Equity

NOTE 4—STOCKHOLDERS’ EQUITY

Reverse Stock Split

At BIOLASE’s annual meeting of stockholders on May 9, 2018 (the “2018 Annual Meeting”), BIOLASE stockholders approved an amendment to BIOLASE’s Restated Certificate of Incorporation, as amended, to effect the Reverse Stock Split of BIOLASE common stock and on May 10, 2018, the Company filed an amendment (the “Amendment”) to its Restated Certificate of Incorporation, as amended, with the Secretary of State of the State of Delaware to effect the Reverse Stock Split, effective as of 11:59 p.m. on May 10, 2018. The Amendment also reduced the authorized shares of common stock from 200,000,000 shares to 40,000,000 shares. Prior year share and per share amounts have been adjusted to reflect the impact of the Reverse Stock Split.

Stock-Based Compensation

2002 Stock Incentive Plan

The 2002 Stock Incentive Plan (as amended effective as of May 26, 2004, November 15, 2005, May 16, 2007, May 5, 2011, June 6, 2013, October 30, 2014, April 27, 2015, and May 6, 2016, the “2002 Plan”) was replaced by the 2018 Plan (as defined below) with respect to future equity awards. Persons eligible to receive awards under the 2002 Plan included officers, employees, and directors of the Company, as well as consultants. As of June 30, 2019, a total of approximately 3.1 million shares of the Company’s common stock have been authorized for issuance under the 2002 Plan, of which approximately 1.5 million shares of the Company’s common stock have been issued pursuant to options that were exercised and restricted stock units (“RSUs”) that were settled in common stock and 1.6 million shares of common stock have been reserved for outstanding options and unvested RSUs, and no shares are available for future grants.

2018 Stock Incentive Plan

At the 2018 Annual Meeting, the Company’s stockholders approved the 2018 Long-Term Incentive Plan (as amended, the “2018 Plan”), which was amended by Amendment No. 1 to the 2018 Plan, approved by the Company’s stockholders at a special meeting on September 21, 2018 and Amendment No. 2 to the 2018 Plan, approved by the Company’s stockholder’s at its annual meeting of stockholders on May 15, 2019. The purposes of the 2018 Plan are (i) to align the interests of the Company’s stockholders and recipients of awards under the 2018 Plan by increasing the proprietary interest of such recipients in the Company’s growth and success; (ii) to advance the interests of the Company by attracting and retaining non-employee directors, officers, other employees, consultants, independent contractors and agents; and (iii) to motivate such persons to act in the long-term best interests of the Company and its stockholders.

Subject to the terms and conditions of the 2018 Plan, the number of shares authorized for grants under the 2018 Plan is 5.0 million. As of June 30, 2019, a total 1.4 million shares of the Company’s common stock have been reserved for outstanding options and unvested RSUs, and 3.6 million shares of common stock remain available for future grants.

The Company recognized stock-based compensation expense of $0.5 million and $0.6 million, for the three months ended June 30, 2019 and June 30, 2018, respectively, and $1.2 million and $1.3 million for the six months ended June 30, 2019 and June 30, 2018, respectively, based on the grant-date fair value. As of June 30, the Company had approximately $1.6 million of total unrecognized compensation expense, net of estimated forfeitures, related to unvested share-based compensation arrangements. The Company expects that expense to be recognized over a weighted-average period of 2.0 years.

The following table summarizes the income statement classification of compensation expense associated with share-based payments (in thousands):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
Cost of revenue	$	54	$	105	$	136	$	162
Sales and marketing		78		154		238		234
General and administrative		283		207		724		674
Engineering and development		32		91		106		188
	$	447	$	557	$	1,204	$	1,258

The stock option fair values were estimated using the Black-Scholes option-pricing model with the following assumptions:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2019			2018			2019			2018
Expected term	6.1 years			5.7 years			6.1 years			5.9 years
Volatility		85.0	%		81.2	%		85.8	%		81.4	%
Annual dividend per share	$	—		$	—		$	—		$	—
Risk-free interest rate		2.50	%		2.71	%		2.60	%		2.46	%

A summary of option activity for the six months ended June 30, 2019 is as follows (in thousands, except per share data):

						Weighted Average
				Weighted		Remaining
				Average		Contractual		Aggregate
	Shares			Exercise Price		Term (Years)		Intrinsic Value(1)
Options outstanding, December 31, 2018		1,623		$	6.54			$	—
Granted at fair market value		70		$	2.08
Exercised		(2	)	$	2.10
Forfeited, cancelled, or expired		(159	)	$	5.77
Options outstanding at June 30, 2019		1,532		$	6.42		5.46	$	16,200
Options exercisable at June 30, 2019		1,165		$	7.56		4.61	$	—
Vested options expired during the quarter ended June 30, 2019		14		$	13.25

(1) The intrinsic value calculation does not include negative values. This can occur when the fair market value on the reporting date is less than the exercise price of the grant.

A summary of unvested stock option activity for the six months ended June 30, 2019 is as follows (in thousands, except per share data):

				Weighted
				Average Grant
	Shares			Date Fair Value
Unvested options at December 31, 2018		522		$	2.11
Granted		70		$	1.53
Vested		(147	)	$	2.94
Forfeited or cancelled		(78	)	$	2.62
Unvested options at June 30, 2019		367		$	1.56

Cash proceeds, along with fair value disclosures related to grants, exercises and vested options are as follows (in thousands, except per share amounts):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
Proceeds from stock options exercised	$	—	$	—	$	3	$	2
Tax benefit related to stock options    exercised (1)	N/A		N/A		N/A		N/A
Intrinsic value of stock options exercised (2)	$	—	$	—	$	—	$	—
Weighted-average fair value of options    granted during period	$	1.53	$	1.27	$	1.53	$	1.46
Total fair value of shares vested during the    period	$	90	$	843	$	431	$	245

(1) Excess tax benefits received related to stock option exercises are presented as operating cash inflows. The Company currently does not receive a tax benefit related to the exercise of stock options due to the Company’s net operating losses.

(2) The intrinsic value of stock options exercised is the amount by which the market price of the stock on the date of exercise exceeded the market price of the stock on the date of grant.

Restricted Stock Units

There were no material grants made during the three and six months ended June 30, 2019.

A summary of unvested RSU activity for the six months ended June 30, 2019 is as follows (in thousands, except per share amounts):

				Weighted
				Average Grant
	Shares			Date Fair Value
Unvested RSUs at December 31, 2018		2,163		$	1.84
Granted		97		$	2.08
Vested		(794	)	$	1.74
Forfeited or cancelled		(213	)	$	2.37
Unvested RSUs at June 30, 2019		1,253		$	1.87

Warrants

The Company issues warrants to acquire shares of the Company’s common stock as approved by the Board. A summary of warrant activity for the six months ended June 30, 2019 is as follows (in thousands, except exercise price amounts):

			Weighted
			Average
	Shares		Exercise Price
Warrants outstanding, December 31, 2018		1,934	$	6.62
Granted or Issued		149	$	2.22
Exercised		—	$	—
Forfeited, cancelled, or expired		—	$	—
Warrants outstanding at June 30, 2019		2,083	$	6.30
Warrants exercisable at June 30, 2019		2,083	$	6.30
Vested warrants expired during the quarter ended June 30, 2019		—	$	—

See Note 9 for additional information on the Western Alliance Warrants, the SWK Warrants, and the DPG Warrants (each as defined below).

Net Loss Per Share – Basic and Diluted

Basic net loss per share is computed by dividing net loss available to common stockholders by the weighted-average number of shares of the Company’s common stock outstanding for the period. In computing diluted net loss per share, the weighted average number of shares outstanding is adjusted to reflect the effect of potentially dilutive securities.

Outstanding stock options, RSUs and warrants to purchase approximately 5.7 million shares were not included in the calculation of diluted loss per share for the three and six months ended June 30, 2019, as their effect would have been anti-dilutive. For the same 2018 periods, anti-dilutive outstanding stock options and warrants to purchase 3.8 million shares were not included in the computation of diluted loss per share.

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Inventory

6 Months Ended

Jun. 30, 2019

Inventory Disclosure [Abstract]

Inventory

NOTE 5—INVENTORY

Inventory is valued at the lower of cost or net realizable value and is comprised of the following (in thousands):

	June 30,		December 31,
	2019		2018
Raw materials	$	3,909	$	3,590
Work-in-process		1,342		1,435
Finished goods		7,083		7,223
Inventory	$	12,334	$	12,248

Inventory includes write-downs for excess and obsolete inventory totaling approximately $1.1 million and $1.1 million as of June 30, 2019 and December 31, 2018, respectively.

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Property, Plant, and Equipment

6 Months Ended

Jun. 30, 2019

Property Plant And Equipment [Abstract]

Property, Plant, and Equipment

NOTE 6—PROPERTY, PLANT, AND EQUIPMENT

Property, plant, and equipment, net is comprised of the following (in thousands):

	June 30,			December 31,
	2019			2018
Building	$	211		$	213
Leasehold improvements		2,004			2,004
Equipment and computers		7,423			7,277
Furniture and fixtures		634			634
Construction in progress		20			25
		10,292			10,153
Accumulated depreciation and amortization		(8,872	)		(8,344	)
		1,420			1,809
Land		165			166
Property, plant, and equipment, net	$	1,585		$	1,975

Depreciation and amortization expense related to property, plant, and equipment totaled $0.3 million and $0.5 million for the three and six months ended June 30, 2019, respectively, and $0.2 million and $0.5 million for the three and six months ended June 30, 2018.

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Intangible Assets and Goodwill

6 Months Ended

Jun. 30, 2019

Goodwill And Intangible Assets Disclosure [Abstract]

Intangible Assets And Goodwill

NOTE 7—INTANGIBLE ASSETS AND GOODWILL

The Company conducted its annual impairment test of goodwill as of June 30, 2019 and determined that there was no impairment. The Company also tests its intangible assets and goodwill between the annual impairment tests if events occur or circumstances change that would more likely than not reduce the fair value of the Company or its assets below their carrying amounts. For intangible assets subject to amortization, the Company performs its impairment test when indicators, such as reductions in demand or significant economic slowdowns, are present. No events have occurred since June 30, 2019 through the date of these unaudited consolidated financial statements that would trigger further impairment testing of the Company’s intangible assets and goodwill.

As of June 30, 2019 and December 31, 2018, the Company had goodwill of $2.9 million. As of June 30, 2019 and December 31, 2018, all intangible assets have been fully amortized and no amortization expense was recognized during the three and six months ended June 30, 2019 and 2018.

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Accrued Liabilities

6 Months Ended

Jun. 30, 2019

Payables And Accruals [Abstract]

Accrued Liabilities

NOTE 8—ACCRUED LIABILITIES

Accrued liabilities are comprised of the following (in thousands):

	June 30,		December 31,
	2019		2018
Payroll and benefits	$	1,660	$	2,400
Patent litigation settlement		—		1,500
Warranty accrual, current portion		764		861
Lease liability		565		—
Accrued professional services		1,060		1,044
Taxes		412		714
Accrued insurance premium		44		328
Customer deposits		19		21
Other		375		670
Total accrued liabilities	$	4,899	$	7,538

Changes in the initial product warranty accrual and the expenses incurred under the Company’s initial and extended warranties for the three and six months ended June 30, 2019 and 2018 are included within accrued liabilities on the Consolidated Balance Sheets and were as follows (in thousands):

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2019			2018			2019			2018
Balance, beginning of period	$	1,384		$	1,214		$	1,308		$	1,190
Provision for estimated warranty cost		383			378			622			624
Warranty expenditures		(268	)		(233	)		(431	)		(455	)
Balance, June 30		1,499			1,359			1,499			1,359
Less warranty accrual, long-term		735			221			735			221
Total warranty accrual, current portion	$	764		$	1,138		$	764		$	1,138

The Company’s Waterlase laser systems sold worldwide are covered by a warranty against defects in material and workmanship for a period of up to 16 months domestically and up to 28 months internationally, from the date of sale by the Company or a distributor to the end-user. The Company’s Diode systems sold worldwide are covered by a warranty against defects in material and workmanship for a period of up to 28 months from the date of sale by the Company or a distributor to the end-user.

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Debt

6 Months Ended

Jun. 30, 2019

Debt Disclosure [Abstract]

Debt

NOTE 9—DEBT

The following table presents the details of the principal outstanding and unamortized discount (in thousands):

	June 30,			December 31,
	2019			2018
Term loan	$	15,000		$	12,500
Discount and debt issuance costs on term loan		(1,672	)		(1,664	)
Total long-term debt, net	$	13,328		$	10,836

Line of Credit

On March 6, 2018, BIOLASE and two of its wholly-owned subsidiaries (such subsidiaries, together with BIOLASE, the “Borrower”) entered into the Business Financing Agreement (the “Business Financing Agreement”) with Western Alliance Bank (“Western Alliance”).Pursuant to the terms and conditions of the Business Financing Agreement, Western Alliance agreed to provide the Borrower a secured revolving line of credit permitting the Borrower to borrow or receive letters of credit up to the lesser of $6.0 million (the “Domestic Revolver”) (subject to a $6.0 million credit limit relating to domestic eligible accounts receivable (the “Domestic Credit Limit”) and a $3.0 million credit limit relating to export-related (the “EXIM Revolver”) eligible accounts receivable (the “EXIM Credit Limit”)) and the borrowing base, which is defined as the sum of the domestic borrowing base (up to 75% of the Borrower’s eligible domestic accounts receivable less such reserves as Western Alliance may deem proper and necessary) and the export-related borrowing base (up to 85% of the Borrower’s eligible export-related accounts receivable less such reserves as Western Alliance may deem proper and necessary). The Business Financing Agreement was set to expire on March 6, 2020, and the Borrower’s obligations thereunder were secured by a security interest in all of the Borrower’s assets.

The Business Financing Agreement required the Company to maintain compliance with certain financial and non-financial covenants, as defined therein. Western Alliance had the right to declare the amounts outstanding under the Business Financing Agreement immediately due and payable upon a default.

Amounts outstanding under the Business Financing Agreement bore interest at a per annum floating rate equal to the greater of 4.5% or the “Prime Rate” published in the Money Rates section of the Western Edition of The Wall Street Journal (or such other rate of interest publicly announced from time to time by Western Alliance as its “Prime Rate”), plus 1.5% with respect to advances made under the line of credit, plus an additional 5.0% during any period that an event of default occurred and was continuing. The commitment fee under the Business Financing Agreement was 0.25% of the domestic credit limit and 1.75% of the EXIM credit limit, payable on March 6, 2018 and each anniversary thereof. 

Pursuant to the Business Financing Agreement, the Company paid the first of two annual commitment fees totaling $67,500, being 0.25% of the aggregate $6.0 million commitment for the Domestic Revolver and 1.75% of the aggregate $3.0 million commitment for the EXIM Revolver. The commitment fees and the legal costs associated with acquiring the credit facilities were capitalized and were amortized on a straight-line basis as interest expense over the term of the Business Financing Agreement.

As additional consideration for the lines of credit, the Company also issued to Western Alliance warrants to purchase shares of the Company’s common stock (the “Original Western Alliance Warrants”). The fair value of the Original Western Alliance Warrants was estimated using the Black-Scholes option-pricing model with the following assumptions: expected term of 10 years; volatility of 91.49%; annual dividend per share of $0.00; and risk-free interest rate of 2.88%; and resulted in an estimated fair value of $0.1 million, which was recorded as a liability and resulted in a discount to the credit facilities at issuance. The discount was expensed to interest expense at the time the Business Financing Agreement was terminated, as discussed below.

On August 13, 2018, the Borrower and Western Alliance entered into a Waiver and Business Financing Modification Agreement, pursuant to which Western Alliance waived certain of the Borrower’s covenants under the Business Financing Agreement and provided an advance of $1.5 million, which advance was due by September 27, 2018.

On September 27, 2018, the Borrower and Western Alliance entered into a second Business Financing Modification Agreement which reduced the credit limit under the Business Financing Agreement to $2.5 million and extended the due date of the $1.5 million advance to March 6, 2019. In connection with the agreement, the Original Western Alliance Warrants were terminated, and the Company issued to Western Alliance new warrants (the “Western Alliance Warrants”) to purchase up to 56,338 shares of the Company’s common stock. The Western Alliance Warrants are immediately exercisable and expire on September 27, 2028. These warrants contain down-round features that require the Company to adjust the exercise price proportionately should the Company issue shares at a price less than the $2.13 per share exercise price.

On October 22, 2018, the Borrower and Western Alliance entered into a third Business Financing Modification Agreement, pursuant to which Western Alliance waived BIOLASE’s non-compliance with certain financial operating covenants as set forth in the Business Financing Agreement, and the Borrower agreed to certain amended covenants contained in the Business Financing Agreement, including a $300,000 minimum unrestricted cash balance covenant and a waiver of reporting items required to be delivered by BIOLASE to Western Alliance under the Business Financing Agreement.

On November 9, 2018, all outstanding borrowings, accrued interest and fees under the Business Financing Agreement were repaid with a portion of the proceeds under the Credit Agreement (as defined and described below), and the Business Financing Agreement was terminated. The Company recorded approximately $0.1 million of interest expense including unamortized debt issuance costs that were written-off upon extinguishment of the debt. As of June 30, 2019 and December 31, 2018, the Western Alliance Warrants remain outstanding and are classified in equity in the consolidated balance sheet.

Term Loan

On November 9, 2018, the Company entered into a five-year secured Credit Agreement (the “Credit Agreement”) with SWK Funding LLC (“SWK”), pursuant to which the Company has borrowed $12.5 million (the “SWK Loan”). The Company’s obligations under the Credit Agreement are secured by substantially all of the Company’s assets. Under the terms of the Credit Agreement, repayment of the loan is interest-only for the first two years, paid quarterly with the option to extend the interest-only period. Principal repayments will begin in the first quarter of 2021 and will be approximately $0.7 million quarterly until the loan matures in the fourth quarter of 2023. The loan bears interest at 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. Approximately $0.9 million of the proceeds from the SWK Loan were used to pay off all amounts owed to Western Alliance under the Business Financing Agreement. The Company plans to use the remaining proceeds to provide additional working capital to fund its growth initiatives, such as broadening its customer base and increasing the utilization of its products to drive recurring higher margin consumables revenue.

The Credit Agreement contains financial and non-financial covenants requiring the Company to, among other things, (i) maintain unencumbered liquid assets of no less than $1.5 million or 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.

In connection with the SWK Loan, the Company paid approximately $1.0 million in debt issuance costs, including a $0.2 million loan origination fee, a $0.4 million finder’s fee, and $0.4 million in legal and other fees. These costs were recognized as a discount on the SWK Loan and are being amortized on a straight-line basis over the loan term which approximates the effective-interest method.

The Company recognized approximately $0.5 million in interest expense relating to the SWK Loan for the period ended June 30, 2019. The weighted-average interest rate for the three months ended June 30, 2019 was 12.7%.

As of March 31, 2019, the Company was not in compliance with certain covenants in the Credit Agreement, as described in Note 9 and in May 2019, SWK granted the Company a waiver of such covenants. On May 7, 2019, the Company and SWK agreed to amend the Credit Agreement (the “First Amendment) to increase the total commitment from $12.5 million to $15.0 million, and to revise the financial covenants to (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 does not reach set minimum revenue levels for the three-month period ended June 30, 2019, and (c) require minimum liquidity of $1.5 million at all times. The First Amendment provides that if aggregate minimum revenue and EBITDA levels are not achieved by September 30, 2019, the minimum liquidity requirement will be increased to $3.0 million, until the Company has obtained additional equity or debt funding of no less than $5.0 million.

In connection with the amendment, the Company paid to SWK loan origination and other fees of approximately $0.1 million payable in cash and approximately $0.2 million in additional SWK Warrants (as defined below) to purchase the Company’s common stock. The Company will also pay an additional finder’s fee to Deal Partners Group (“DPG”) of approximately $0.1 million in cash and $0.1 million in additional DPG Warrants to purchase the Company’s common stock. The Company accounted for the First Amendment as a modification to existing debt and as a result, recognized the amounts paid to SWK in cash and warrants as additional debt issuance costs. Amounts paid to DPG in cash and warrants relating to the First Amendment were expensed as incurred in the Company’s consolidated statement of operations for the three and six months ended June 30, 2019.

SWK Warrants

In connection with the Credit Agreement, as amended, the Company issued warrants to SWK (the “SWK Warrants”) on November 9, 2018 to purchase up to 372,023 and on May 7, 2019, to purchase up to 115,175 shares of the Company’s common stock. The SWK Warrants are immediately exercisable and expire 7 years after the issuance date. The exercise price of the SWK Warrants issued on November 9, 2018 is $1.34 and the exercise price of the SWK Warrants issued on May 7, 2019 is $2.17, both of which were based on the average closing price of the Company’s common stock for the ten trading days immediately preceding the issuance date. These warrants contain down-round features that require the Company to adjust the exercise price proportionately should the Company issue shares at a price per share less than the exercise price. The fair value of the 372,023 SWK Warrants issued on November 9, 2018 was $0.4 million and estimated using the Black-Scholes option-pricing model with the following assumptions: expected term of 8 years; volatility of 81.79%; annual dividend per share of $0.00; and risk-free interest rate of 3.13%. The fair value of the 115,175 SWK Warrants issued on May 7, 2019 was $0.2 million and estimated using a binomial option pricing model with the following assumptions: expected term of 8 years; volatility of 80.73%; annual dividend per share of $0.00; and a risk-free rate of 2.37%.

DPG Warrants

In connection with the SWK Loan, the Company paid a finder’s fee to DPG of $0.5 million cash and issued warrants (“the DPG warrants) on November 9, 2018 to purchase up to 279,851 shares of common stock and on May 7, 2019 to purchase up to 34,552 shares of the Company’s common stock. The DPG Warrants are exercisable immediately and expire 7 years after the issuance date. The exercise price of the DPG Warrants issued on November 9, 2018 is $1.34 and the exercise price of the DPG warrants issued on May 7, 2019 is $2.17, both of which were based on the average closing price of the Company’s common stock for the ten trading days immediately preceding the issuance date. These warrants contain down-round features that require the Company to adjust the exercise price proportionately should the Company issue shares at a price per share less than the exercise price. The fair value of the 279,851 DPG Warrants issued on November 9, 2018 was $0.3 million was estimated using the Black Scholes option pricing model with the following assumptions: expected term of 8 years; volatility of 81.79%; annual dividend per share of $0.00; and risk-free interest rate of 3.13%. The fair value of the 34,552 DPG Warrants issued on May 7, 2019 was $0.1 million and estimated using a binomial option pricing model with the following assumptions: expected term of 8 years; volatility of 80.73%; annual dividend per share of $0.00; and a risk-free rate of 2.37%.

The value of both of the SWK Warrants issued in 2018 and 2019 and the DPG Warrants issued in 2018, was recognized as a discount on the SWK Loan and is being amortized on a straight-line basis which approximates the effective-interest method, over the loan term of five years. The value of the DPG Warrants issued in 2019 in connection with the First Amendment were expensed in the three-month period ended June 30, 2019.

Additionally, based on the adoption of ASU 2017-11 in the fourth quarter of 2018, these warrants are classified as equity in the consolidated Balance Sheets as of June 30, 2019 and December 31, 2018.

The future minimum principal and interest payments as of June 30, 2019 are as follows (in thousands):

	Principal		Interest (1)
2019	$	—	$	936
2020		—		1,872
2021		2,100		1,654
2022		2,800		1,304
2023		10,100		955
Total future payments	$	15,000	$	6,721
(1) estimated using LIBOR rates as at June 30, 2019

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Leases

6 Months Ended

Jun. 30, 2019

Leases [Abstract]

Leases

NOTE 10— LEASES

The Company enters into operating leases primarily for real estate, office equipment, and fleet vehicles. Lease terms generally range from one to five years, and often include options to renew for one year. On January 1, 2019, the Company adopted Topic 842, using the modified-retrospective approach as discussed in Note 2, and as a result recognized a right-of-use asset of approximately $0.8 million as adjusted for deferred rent at the date of adoption of $0.2 million, and a lease liability of approximately $1.0 million. No cumulative-effect adjustment to retained earnings was required upon adoption of Topic 842. Right-of-use assets are recorded in Other assets and lease liabilities are included in Accrued liabilities or Other liabilities depending on whether they are current or noncurrent. Because the rate implicit in each lease is not readily determinable, the Company uses its incremental borrowing rate (“IBR”) to determine the present value of the lease payments and on the date of adoption, the Company determined its IBR to be 12.78%. This rate was based on the Company’s financing of the SWK Loan which is a collateralized loan, and was based on prevailing market rates during the fourth quarter of 2018.

Information related to the Company’s right-of-use assets and related liabilities were as follows (in thousands):

	Six Months Ended
	June 30, 2019
Cash paid for operating lease liabilities	$	414
Right-of-use assets obtained in exchange for new operating lease    obligations		803
Weighted-average remaining lease term	1.6 years
Weighted-average discount rate		12.8	%

The Company allocates lease cost amongst lease and non-lease components. The Company excludes short-term leases (those with lease terms of less than one year at inception) from the measurement of lease liabilities or right-of-use assets.

Maturities of lease liabilities as of June 30, 2019 were as follows (in thousands):

Due in 12 month period ended June 30,
2020	$	622
2021		63
Thereafter		—
	$	685
Less imputed interest		(42	)
Total lease liabilities	$	643
Current operating lease liabilities		565
Non-current lease liabilities		78
Total lease liabilities	$	643

As of June 30, 2019, right-of-use assets were $0.5 million and lease liabilities were $0.6 million. During the three and six months ended June 30, 2019, the Company did not enter into any new lease arrangements, nor did it have any arrangements that had not commenced.

Future minimum rental commitments under lease agreements, as of June 30, 2019, with non-cancelable terms greater than one year for each of the periods ending June 30, are as follows (in thousands):

	Period Ended June 30, 2019
2019	$	622
2020		63
2021		—
2022 and thereafter		—
Total future minimum lease obligations	$	685

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Commitments and Contingencies

6 Months Ended

Jun. 30, 2019

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingencies

NOTE 11— COMMITMENTS AND CONTINGENCIES

On April 24, 2012, CAO Group, Inc. (“CAO”) filed a lawsuit against BIOLASE in the District of Utah alleging that BIOLASE’s ezlase dental laser infringes on U.S. Patent No. 7,485,116 (the “116 Patent”). On September 9, 2012, CAO amended its complaint, adding claims for (1) business disparagement/injurious falsehood under common law and (2) unfair competition under 15 U.S.C. Section 1125(a). The additional claims stem from a press release that BIOLASE issued on April 30, 2012, which CAO claims contained false statements that are disparaging to CAO and its diode product. The amended complaint sought injunctive relief, treble damages, attorneys’ fees, punitive damages, and interest. Until January 24, 2018, this lawsuit was stayed in connection with United States Patent and Trademark Office proceedings relating to the 116 Patent, which proceedings ultimately culminated in a January 27, 2017 decision by the United States Court of Appeals for the Federal Circuit, affirming the findings of the Patent Trial and Appeal Board, which were generally favorable to the Company. On January 25, 2018, CAO moved for leave to file a second amended complaint to add certain claims, which filing the Company is not opposing.

On January 23, 2018, CAO filed a lawsuit against BIOLASE in the Central District of California alleging that BIOLASE’s diode lasers infringe on U.S. Patent Nos. 8,337,097, 8,834,497, 8,961,040 and 8,967,883. The complaint seeks injunctive relief, treble damages, attorneys’ fees, punitive damages, and interest.

On January 25, 2019 (the “Effective Date”), BIOLASE entered into a settlement agreement (the “Settlement Agreement”) with CAO. Pursuant to the Settlement Agreement, CAO agreed to dismiss with prejudice the lawsuits filed by CAO against the Company in April 2012 and January 2018. In addition, CAO granted to the Company and its affiliates a non-exclusive, non-transferable (except as provided in the Settlement Agreement), royalty-free, fully-paid, worldwide license to the licensed patents for use in the licensed products and agreed not to sue the Company, its affiliates or any of its manufacturers, distributors, suppliers or customers for use of the licensed patents in the licensed products, and the parties agreed to a mutual release of claims. The Company has agreed (i) to pay to CAO, within five days of the Effective Date, $500,000 in cash, (ii) to issue to CAO, within 30 days of the Effective Date, 500,000 restricted shares of common stock of the Company (the “Stock Consideration”), and (iii) to pay to CAO, within 30 days of December 31, 2021, an amount in cash equal to the difference (if positive) between $1,000,000 and the value of the Stock Consideration on December 31, 2021. The Stock Consideration vests and becomes transferrable on December 31, 2021, subject to the terms of a restricted stock agreement to be entered into between the parties. The Company considered this a Type I subsequent event and recognized a $1.5 million contingent loss on patent litigation settlement in its statement of operations for the year ended December 31, 2018. In January 2019, the Company paid CAO $500,000 in cash. On January 31, 2019, the case was dismissed with prejudice. During the three and six month periods ended June 30, 2019, the Company recorded an additional gain on patent litigation of $0.2million and $0.0 million, respectively, million which represents the change in fair value of the restricted stock to be issued to CAO, resulting in a total $1.0 million accrued liability as of June 30, 2019.

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Segment Information

6 Months Ended

Jun. 30, 2019

Segment Reporting [Abstract]

Segment Information

NOTE 12—SEGMENT INFORMATION

The Company currently operates in a single business segment. Management uses one measurement of profitability and does not segregate its business for internal reporting. For the three and six months ended June 30, 2019, sales to customers in the United States accounted for approximately 68% and 63% of net revenue, respectively, and international sales accounted for approximately 32% and 37% of net revenue, respectively. No individual country, other than the United States, represented more than 10% of total net revenue during the three and six months ended June 30, 2019 or 2018.

Net revenue by geographic location based on the location of customers was as follows (in thousands):  

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
United States	$	5,898	$	7,164	$	12,014	$	12,857
International		2,747		4,990		6,957		9,317
	$	8,645	$	12,154	$	18,971	$	22,174

Property, plant, and equipment by geographic location was as follows (in thousands):

	June 30,		December 31,
	2019		2018
United States	$	1,290	$	1,673
International		295		302
	$	1,585	$	1,975

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Concentrations

6 Months Ended

Jun. 30, 2019

Risks And Uncertainties [Abstract]

Concentrations

NOTE 13—CONCENTRATIONS

Revenue from the Company’s products for the three and six months ended June 30, 2019 and 2018 are as follows (dollars in thousands):

	Three Months Ended								Six Months Ended
	June 30,								June 30,
	2019				2018				2019				2018
Laser systems	$	4,917	56.9	%	$	7,920	65.2	%	$	10,880	57.4	%	$	13,623	61.4	%
Imaging systems		63	0.7	%		371	3.1	%		615	3.2	%		954	4.3	%
Consumables and other		2,084	24.1	%		2,303	18.9	%		4,196	22.1	%		4,337	19.6	%
Services		1,578	18.3	%		1,557	12.8	%		3,273	17.3	%		3,254	14.7	%
License fees and royalties		3	—	%		3	—	%		7	—	%		6	—	%
Net revenue	$	8,645	100.0	%	$	12,154	100.0	%	$	18,971	100.0	%	$	22,174	100.0	%

No individual customer represented more than 10% of the Company’s total net revenue for the three and six months ended June 30, 2019 or 2018.

The Company maintains its cash and cash equivalent accounts with established commercial banks. Such cash deposits periodically exceed the Federal Deposit Insurance Corporation insured limit.

One individual customer represented more than 10% of the Company’s accounts receivable at June 30, 2019 and December 31, 2018.

The Company currently purchases certain key components of its products from single suppliers. Although there are a limited number of manufacturers of these key components, management believes that other suppliers could provide similar key components on comparable terms. A change in suppliers, however, could cause delays in manufacturing and a possible loss of sales, which could adversely affect the Company’s business, results of operations and financial condition.

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Income Taxes

6 Months Ended

Jun. 30, 2019

Income Tax Disclosure [Abstract]

Income Taxes

NOTE 14—INCOME TAXES

The Company accounts for income taxes under the asset and liability method, whereby deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. Management evaluates the need to establish a valuation allowance for deferred tax assets based upon the amount of existing temporary differences, the period in which they are expected to be recovered, and expected levels of taxable income. A valuation allowance to reduce deferred tax assets is established when it is “more likely than not” that some or all of the deferred tax assets will not be realized. Based on the Company’s net losses in prior years, management has determined that a full valuation allowance against the Company’s net deferred tax assets is appropriate.

Accounting for uncertainty in income taxes prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return and provides guidance on de-recognition, classification, interest and penalties, accounting in interim periods, disclosure, and transition. The Company has elected to classify interest and penalties as a component of its income tax provision. With respect to the liability for unrecognized tax benefits, including related estimates of penalties and interest, the Company did not record a liability for unrecognized tax benefits for the three and six months ended June 30, 2019 and 2018. The Company does not expect any changes to its unrecognized tax benefit for the next 12 months that would materially impact its consolidated financial statements.

During the three and six months ended June 30, 2019, the Company recorded an income tax provision of $28,000 and $42,000, respectively, resulting in an effective tax rate of 0.5% and 0.3%, respectively. During the three and six months ended June 30, 2018, the Company recorded an income tax provision of $10,000 and $42,000, respectively, resulting in an effective tax rate of (10.0)% and 0.8%, respectively. The income tax provisions for the three and six months ended June 30, 2019 2018 were calculated using the discrete year-to-date method. The effective tax rate differs from the statutory tax rate of 21% primarily due to the existence of valuation allowances against net deferred tax assets and current liabilities resulting from the estimated state income tax liabilities and foreign tax liability.

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Summary of Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2019

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation

The unaudited consolidated financial statements include the accounts of BIOLASE and its wholly-owned subsidiaries and have been prepared on a basis consistent with the December 31, 2018 audited consolidated financial statements and include all material adjustments, consisting of normal recurring adjustments and the elimination of all material intercompany transactions and balances, necessary to fairly present the information set forth therein. These unaudited, interim, consolidated financial statements do not include all the footnotes, presentations, and disclosures normally required by accounting principles generally accepted in the United States of America (“GAAP”) for complete consolidated financial statements.

The consolidated results of operations for the three and six months ended June 30, 2019 are not necessarily indicative of the results for the full year. The accompanying consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto for the year ended December 31, 2018, included in BIOLASE’s Annual Report on Form 10-K for the year ended December 31, 2018 filed with the Securities and Exchange Commission (the “SEC”) on March 8, 2019 (the “2018 Form 10-K”).

Liquidity and Management's Plans

Liquidity and Management’s Plans

The Company incurred a loss from operations and a net loss, and used cash in operating activities for the three and six months ended June 30, 2019. The Company’s recurring losses, level of cash used in operations, and potential need for additional capital, along with uncertainties surrounding the Company’s ability to raise additional capital, raise substantial doubt about the Company’s ability to continue as a going concern. The financial statements do not include any adjustments that might be necessary if the Company is unable to continue as a going concern.

As of March 31, 2019, the Company was not in compliance with certain of its loan covenants relating to the SWK Loan (as defined below). In May 2019, SWK Funding, LLC granted the Company a waiver of such covenants. On May 7, 2019, the Company entered into an amendment of its Credit Agreement with SWK Funding, LLC to increase the total loan commitment in the SWK Loan from $12.5 million to $15.0 million, to revise certain of the financial covenants and to issue additional warrants to purchase the Company’s common stock. See Note 9 for additional information.

As of June 30, 2019, the Company had working capital of approximately $13.8 million. The Company’s principal sources of liquidity as of June 30, 2019 consisted of approximately $4.0 million in cash, cash equivalents and restricted cash and $9.7 million of accounts receivable.  

In order for the Company to continue operations beyond the next 12 months and be able to discharge its liabilities and commitments in the normal course of business, it must sell its products directly to end users and through distributors, establish profitable operations through increased sales, decrease expenses, generate cash from operations, or obtain additional funds when needed. The Company intends to improve its financial condition and ultimately improve its financial results by increasing revenues through expansion of its product offerings, continuing to expand and develop its field sales force and distributor relationships both domestically and internationally, forming strategic arrangements within the dental and medical industries, educating dental and medical patients as to the benefits of its advanced medical technologies, and reducing expenses.

Additional capital requirements may depend on many factors, including, among other things, continued losses, the rate at which the Company’s business grows, demands for working capital, manufacturing capacity, and any acquisitions that the Company may pursue. From time to time, the Company could be required, or may otherwise attempt, to raise capital, through either equity or debt offerings, or enter into an additional line of credit facility.

Reverse Stock Split

Reverse Stock Split

Except as the context otherwise requires, all share numbers and share price amounts (including exercise prices and closing market prices) contained in the unaudited financial statements and notes thereto reflect the one-for-five reverse stock split (“the Reverse Stock Split”) effectuated by the Company on May 10, 2018. See Note 4 below for additional information.

Use of Estimates

Use of Estimates

The preparation of these unaudited consolidated financial statements in conformity with GAAP requires the Company to make estimates and assumptions that affect amounts reported in the consolidated financial statements and the accompanying notes. Significant estimates in these unaudited consolidated financial statements include allowances on accounts receivable, inventory, and deferred taxes, as well as estimates for accrued warranty expenses, goodwill and the ability of goodwill to be realized, revenue deferrals, effects of stock-based compensation and warrants, contingent liabilities, and the provision or benefit for income taxes. Due to the inherent uncertainty involved in making estimates, actual results reported in future periods may differ materially from those estimates.

Critical Accounting Policies

Critical Accounting Policies

Information with respect to the Company’s critical accounting policies, which management believes could have the most significant effect on the Company’s reported results and require subjective or complex judgments by management is contained in Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” of the 2018 Form 10-K. Management believes that there have been no significant changes during the six months ended June 30, 2019 in the Company’s critical accounting policies from those disclosed in Item 7 of the 2018 Form 10-K.

Fair Value of Financial Instruments

Fair Value of Financial Instruments

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants in the principal market (or, if none exists, the most advantageous market) for the specific asset or liability at the measurement date (referred to as the “exit price”). The fair value is based on assumptions that market participants would use, including a consideration of non-performance risk. Under the accounting guidance for fair value hierarchy, there are three levels of measurement inputs. Level 1 inputs are quoted prices in active markets for identical assets or liabilities. Level 2 inputs are observable, either directly or indirectly. Level 3 inputs are unobservable due to little or no corroborating market data.

The Company’s financial instruments, consisting of cash, cash equivalents, restricted cash, accounts receivable, accounts payable, accrued liabilities, and the SWK Loan as discussed in Note 9, approximate fair value because of the liquid or short-term nature of these items.

Concentration of Credit Risk, Interest Rate Risk and Foreign Currency Exchange Rate

Concentration of Credit Risk, Interest Rate Risk and Foreign Currency Exchange Rate

Financial instruments which potentially expose the Company to a concentration of credit risk consist principally of cash and cash equivalents, restricted cash, and trade accounts receivable. The Company maintains its cash and cash equivalents and restricted cash with established commercial banks. At times, balances may exceed federally insured limits. To minimize the risk associated with trade accounts receivable, management performs ongoing credit evaluations of customers’ financial condition and maintains relationships with the Company’s customers that allow management to monitor current changes in business operations so the Company can respond as needed. The Company does not, generally, require customers to provide collateral before it sells them its products. However, the Company has required certain distributors to make prepayments for significant purchases of products.

Substantially all of the Company’s revenue is denominated in U.S. dollars, including sales to international distributors. Only a small portion of its revenue and expenses is denominated in foreign currencies, principally the Euro and Indian Rupee. The Company’s foreign currency expenditures primarily consist of the cost of maintaining offices, consulting services, and employee-related costs. During the six-month periods ended June 30, 2019 and 2018, the Company did not enter into any hedging contracts. Future fluctuations in the value of the U.S. dollar may affect the price competitiveness of the Company’s products outside the U.S.

Recent Accounting Pronouncements

Recent Accounting Pronouncements

Changes to GAAP are established by the Financial Accounting Standards Board (the “FASB”) in the form of accounting standards updates (“ASUs”) to the FASB’s Accounting Standards Codification.

The Company considers the applicability and impact of all ASUs. ASUs not listed below were assessed and determined not to be applicable or are expected to have minimal impact on the Company’s consolidated financial position and results of operations.

Adopted Accounting Pronouncements

In February 2016, the FASB established ASU Topic 842 – Leases, by issuing ASU Topic No. 2016-02 (“Topic 842”), which requires lessees to recognize lease on-balance sheet and disclose key information about leasing arrangements. Topic 842 was subsequently amended by ASU Topic 2018-11 – Targeted Improvements. The new standard establishes a right-of-use model (“ROU”) that requires a lessee to recognize a ROU asset and a lease liability for all leases with a term longer than 12 months. Leases will be classified as finance or operating, with classification affecting the pattern and classification of expense recognition in the statement of operations.

The Company adopted Topic 842 in the first quarter of 2019 utilizing the modified retrospective transition method and a cumulative effect adjustment at the beginning of the first quarter of 2019. The Company has elected the package of practical expedients, which allows the Company not to reassess (1) whether any expired or existing contracts as of the adoption date are or contain a lease, (2) lease classification for any expired or existing leases as of the adoption date, and (3) initial direct costs for any existing leases as of the adoption date. The Company did not elect to apply the hindsight practical expedient when determining lease term and assessing impairment of the right-to-use assets. The adoption of Topic 842 resulted in the recognition of right-of use assets of approximately $0.8 million after a $0.2 million adjustment for deferred rent, and lease liabilities for operating leases of approximately $1.0 million, and no cumulative effect adjustment on retained earnings on its unaudited Consolidated Balance Sheets nor material impact to its unaudited Consolidated Statements of Operations and Comprehensive Loss in the period of adoption. Right-of-use assets are included in Other assets, and lease liabilities are included in Accrued liabilities or Other liabilities in the unaudited consolidated balance sheet for the period ended June 30, 2019. See Note 10 for additional information.

Recently Issued Accounting Standards

In June 2016, the FASB issued a new standard to replace the incurred loss impairment methodology under current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. The Company will be required to use a forward-looking expected credit loss model for accounts receivables, loans, and other financial instruments. Credit losses relating to available-for-sale debt securities will also be recorded through an allowance for credit losses rather than as a reduction in the amortized cost basis of the securities. The standard will be effective for the Company beginning January 1, 2020, with early adoption permitted beginning January 1, 2019. The Company is currently evaluating the impact of this standard on the Company’s consolidated financial statements, including accounting policies, processes, and systems.

Income Tax Uncertainties

Accounting for uncertainty in income taxes prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return and provides guidance on de-recognition, classification, interest and penalties, accounting in interim periods, disclosure, and transition. The Company has elected to classify interest and penalties as a component of its income tax provision. With respect to the liability for unrecognized tax benefits, including related estimates of penalties and interest, the Company did not record a liability for unrecognized tax benefits for the three and six months ended June 30, 2019 and 2018. The Company does not expect any changes to its unrecognized tax benefit for the next 12 months that would materially impact its consolidated financial statements.

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Revenue Recognition (Tables)

6 Months Ended

Jun. 30, 2019

Revenue Recognition [Abstract]

Summary of Opening and Closing Balances of Contract Liabilities

The Company performs its obligations under a contract with a customer by transferring products and/or services in exchange for consideration from the customer. The Company typically invoices its customers as soon as control of an asset is transferred and a receivable for the Company is established. The Company, however, recognizes a contract liability when a customer prepays for goods and/or services and the Company has not transferred control of the goods and/or services. The opening and closing balances of the Company’s contract liabilities are as follows (in thousands):

	June 30,		December 31,
	2019		2018
Undelivered elements (training, installation, product and    support services)	$	563	$	730
Extended warranty contracts		1,945		1,735
Deferred royalties		5		11
Total deferred revenue		2,513		2,476
Less long-term portion of deferred revenue		—		—
Deferred revenue — current	$	2,513	$	2,476

Summary of Disaggregation of Revenues Related to Geographic Areas

The Company’s revenues related to the following geographic areas were as follows for the periods indicated (in thousands):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
United States	$	5,898	$	7,164	$	12,014	$	12,857
International		2,747		4,990		6,957		9,317
	$	8,645	$	12,154	$	18,971	$	22,174

Summary of Revenues Disaggregated by Timing of Goods and Services Transferred

Information regarding revenues disaggregated by the timing of when goods and services are transferred is as follows (in thousands):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
Revenue recognized over time	$	1,646	$	1,557	$	3,415	$	3,254
Revenue recognized at a point in time		6,999		10,597		15,556		18,920
Total	$	8,645	$	12,154	$	18,971	$	22,174

Summary of Sales by End Market

The Company’s sales by end market were as follows for the periods indicated (in thousands):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
End-customer	$	5,553	$	7,675	$	11,254	$	13,712
Distributors		3,092		4,479		7,717		8,462
	$	8,645	$	12,154	$	18,971	$	22,174

Summary of Percentages of Sales by Product line

The percentages of the Company’s sales by product line were as follows for the periods indicated:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2019			2018			2019			2018
Laser systems		56.9	%		65.2	%		57.4	%		61.4	%
Imaging systems		0.7	%		3.1	%		3.2	%		4.3	%
Consumables and other		24.2	%		18.9	%		22.2	%		19.6	%
Services		18.2	%		12.8	%		17.2	%		14.7	%
License fees and royalties		—	%		—	%		—	%		—	%
		100.0	%		100.0	%		100.0	%		100.0	%

Revenue from the Company’s products for the three and six months ended June 30, 2019 and 2018 are as follows (dollars in thousands):

	Three Months Ended								Six Months Ended
	June 30,								June 30,
	2019				2018				2019				2018
Laser systems	$	4,917	56.9	%	$	7,920	65.2	%	$	10,880	57.4	%	$	13,623	61.4	%
Imaging systems		63	0.7	%		371	3.1	%		615	3.2	%		954	4.3	%
Consumables and other		2,084	24.1	%		2,303	18.9	%		4,196	22.1	%		4,337	19.6	%
Services		1,578	18.3	%		1,557	12.8	%		3,273	17.3	%		3,254	14.7	%
License fees and royalties		3	—	%		3	—	%		7	—	%		6	—	%
Net revenue	$	8,645	100.0	%	$	12,154	100.0	%	$	18,971	100.0	%	$	22,174	100.0	%

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Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2019

Equity [Abstract]

Summary of Income Statement Classification of Compensation Expense

The following table summarizes the income statement classification of compensation expense associated with share-based payments (in thousands):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
Cost of revenue	$	54	$	105	$	136	$	162
Sales and marketing		78		154		238		234
General and administrative		283		207		724		674
Engineering and development		32		91		106		188
	$	447	$	557	$	1,204	$	1,258

Assumptions on Estimation of Stock Option Fair Values

The stock option fair values were estimated using the Black-Scholes option-pricing model with the following assumptions:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2019			2018			2019			2018
Expected term	6.1 years			5.7 years			6.1 years			5.9 years
Volatility		85.0	%		81.2	%		85.8	%		81.4	%
Annual dividend per share	$	—		$	—		$	—		$	—
Risk-free interest rate		2.50	%		2.71	%		2.60	%		2.46	%

Summary of Option Activity

A summary of option activity for the six months ended June 30, 2019 is as follows (in thousands, except per share data):

						Weighted Average
				Weighted		Remaining
				Average		Contractual		Aggregate
	Shares			Exercise Price		Term (Years)		Intrinsic Value(1)
Options outstanding, December 31, 2018		1,623		$	6.54			$	—
Granted at fair market value		70		$	2.08
Exercised		(2	)	$	2.10
Forfeited, cancelled, or expired		(159	)	$	5.77
Options outstanding at June 30, 2019		1,532		$	6.42		5.46	$	16,200
Options exercisable at June 30, 2019		1,165		$	7.56		4.61	$	—
Vested options expired during the quarter ended June 30, 2019		14		$	13.25

(1) The intrinsic value calculation does not include negative values. This can occur when the fair market value on the reporting date is less than the exercise price of the grant.

Summary of Unvested Stock Option Activity

A summary of unvested stock option activity for the six months ended June 30, 2019 is as follows (in thousands, except per share data):

				Weighted
				Average Grant
	Shares			Date Fair Value
Unvested options at December 31, 2018		522		$	2.11
Granted		70		$	1.53
Vested		(147	)	$	2.94
Forfeited or cancelled		(78	)	$	2.62
Unvested options at June 30, 2019		367		$	1.56

Cash Proceeds, Along With Fair Value Disclosures Related to Grants, Exercises and Vesting Options

Cash proceeds, along with fair value disclosures related to grants, exercises and vested options are as follows (in thousands, except per share amounts):

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
Proceeds from stock options exercised	$	—	$	—	$	3	$	2
Tax benefit related to stock options    exercised (1)	N/A		N/A		N/A		N/A
Intrinsic value of stock options exercised (2)	$	—	$	—	$	—	$	—
Weighted-average fair value of options    granted during period	$	1.53	$	1.27	$	1.53	$	1.46
Total fair value of shares vested during the    period	$	90	$	843	$	431	$	245

(1) Excess tax benefits received related to stock option exercises are presented as operating cash inflows. The Company currently does not receive a tax benefit related to the exercise of stock options due to the Company’s net operating losses.

(2) The intrinsic value of stock options exercised is the amount by which the market price of the stock on the date of exercise exceeded the market price of the stock on the date of grant.

Summary of Unvested Restricted Stock Units

A summary of unvested RSU activity for the six months ended June 30, 2019 is as follows (in thousands, except per share amounts):

				Weighted
				Average Grant
	Shares			Date Fair Value
Unvested RSUs at December 31, 2018		2,163		$	1.84
Granted		97		$	2.08
Vested		(794	)	$	1.74
Forfeited or cancelled		(213	)	$	2.37
Unvested RSUs at June 30, 2019		1,253		$	1.87

Summary of Warrant Activity

The Company issues warrants to acquire shares of the Company’s common stock as approved by the Board. A summary of warrant activity for the six months ended June 30, 2019 is as follows (in thousands, except exercise price amounts):

			Weighted
			Average
	Shares		Exercise Price
Warrants outstanding, December 31, 2018		1,934	$	6.62
Granted or Issued		149	$	2.22
Exercised		—	$	—
Forfeited, cancelled, or expired		—	$	—
Warrants outstanding at June 30, 2019		2,083	$	6.30
Warrants exercisable at June 30, 2019		2,083	$	6.30
Vested warrants expired during the quarter ended June 30, 2019		—	$	—

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Inventory (Tables)

6 Months Ended

Jun. 30, 2019

Inventory Disclosure [Abstract]

Components of Inventory

Inventory is valued at the lower of cost or net realizable value and is comprised of the following (in thousands):

	June 30,		December 31,
	2019		2018
Raw materials	$	3,909	$	3,590
Work-in-process		1,342		1,435
Finished goods		7,083		7,223
Inventory	$	12,334	$	12,248

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Property, Plant, and Equipment (Tables)

6 Months Ended

Jun. 30, 2019

Property Plant And Equipment [Abstract]

Summary of Property, Plant, and Equipment

Property, plant, and equipment, net is comprised of the following (in thousands):

	June 30,			December 31,
	2019			2018
Building	$	211		$	213
Leasehold improvements		2,004			2,004
Equipment and computers		7,423			7,277
Furniture and fixtures		634			634
Construction in progress		20			25
		10,292			10,153
Accumulated depreciation and amortization		(8,872	)		(8,344	)
		1,420			1,809
Land		165			166
Property, plant, and equipment, net	$	1,585		$	1,975

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Accrued Liabilities (Tables)

6 Months Ended

Jun. 30, 2019

Payables And Accruals [Abstract]

Components of Accrued Liabilities

Accrued liabilities are comprised of the following (in thousands):

	June 30,		December 31,
	2019		2018
Payroll and benefits	$	1,660	$	2,400
Patent litigation settlement		—		1,500
Warranty accrual, current portion		764		861
Lease liability		565		—
Accrued professional services		1,060		1,044
Taxes		412		714
Accrued insurance premium		44		328
Customer deposits		19		21
Other		375		670
Total accrued liabilities	$	4,899	$	7,538

Changes in Initial Product Warranty Accrual and Expenses Under Initial and Extended Warranties

Changes in the initial product warranty accrual and the expenses incurred under the Company’s initial and extended warranties for the three and six months ended June 30, 2019 and 2018 are included within accrued liabilities on the Consolidated Balance Sheets and were as follows (in thousands):

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2019			2018			2019			2018
Balance, beginning of period	$	1,384		$	1,214		$	1,308		$	1,190
Provision for estimated warranty cost		383			378			622			624
Warranty expenditures		(268	)		(233	)		(431	)		(455	)
Balance, June 30		1,499			1,359			1,499			1,359
Less warranty accrual, long-term		735			221			735			221
Total warranty accrual, current portion	$	764		$	1,138		$	764		$	1,138

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Debt (Tables)

6 Months Ended

Jun. 30, 2019

Debt Disclosure [Abstract]

Summary of Principal Outstanding and Unamortized Discount

The following table presents the details of the principal outstanding and unamortized discount (in thousands):

	June 30,			December 31,
	2019			2018
Term loan	$	15,000		$	12,500
Discount and debt issuance costs on term loan		(1,672	)		(1,664	)
Total long-term debt, net	$	13,328		$	10,836

Summary of Future Minimum Principal and Interest Payments

The future minimum principal and interest payments as of June 30, 2019 are as follows (in thousands):

	Principal		Interest (1)
2019	$	—	$	936
2020		—		1,872
2021		2,100		1,654
2022		2,800		1,304
2023		10,100		955
Total future payments	$	15,000	$	6,721
(1) estimated using LIBOR rates as at June 30, 2019

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Leases (Tables)

6 Months Ended

Jun. 30, 2019

Leases [Abstract]

Information related to Right-of-use Assets and Liabilities

Information related to the Company’s right-of-use assets and related liabilities were as follows (in thousands):

	Six Months Ended
	June 30, 2019
Cash paid for operating lease liabilities	$	414
Right-of-use assets obtained in exchange for new operating lease    obligations		803
Weighted-average remaining lease term	1.6 years
Weighted-average discount rate		12.8	%

Schedule of Maturities of Lease Liabilities

Maturities of lease liabilities as of June 30, 2019 were as follows (in thousands):

Due in 12 month period ended June 30,
2020	$	622
2021		63
Thereafter		—
	$	685
Less imputed interest		(42	)
Total lease liabilities	$	643
Current operating lease liabilities		565
Non-current lease liabilities		78
Total lease liabilities	$	643

Future minimum rental commitments under lease agreements with non-cancelable Operating Leases

Future minimum rental commitments under lease agreements, as of June 30, 2019, with non-cancelable terms greater than one year for each of the periods ending June 30, are as follows (in thousands):

	Period Ended June 30, 2019
2019	$	622
2020		63
2021		—
2022 and thereafter		—
Total future minimum lease obligations	$	685

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Segment Information (Tables)

6 Months Ended

Jun. 30, 2019

Segment Reporting [Abstract]

Summary of Net Revenue by Geographic Location

Net revenue by geographic location based on the location of customers was as follows (in thousands):  

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2019		2018		2019		2018
United States	$	5,898	$	7,164	$	12,014	$	12,857
International		2,747		4,990		6,957		9,317
	$	8,645	$	12,154	$	18,971	$	22,174

Summary of Property, Plant and Equipment by Geographic Location

Property, plant, and equipment by geographic location was as follows (in thousands):

	June 30,		December 31,
	2019		2018
United States	$	1,290	$	1,673
International		295		302
	$	1,585	$	1,975

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Concentrations (Tables)

6 Months Ended

Jun. 30, 2019

Risks And Uncertainties [Abstract]

Summary of Percentages of Sales by Product line

The percentages of the Company’s sales by product line were as follows for the periods indicated:

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2019			2018			2019			2018
Laser systems		56.9	%		65.2	%		57.4	%		61.4	%
Imaging systems		0.7	%		3.1	%		3.2	%		4.3	%
Consumables and other		24.2	%		18.9	%		22.2	%		19.6	%
Services		18.2	%		12.8	%		17.2	%		14.7	%
License fees and royalties		—	%		—	%		—	%		—	%
		100.0	%		100.0	%		100.0	%		100.0	%

Revenue from the Company’s products for the three and six months ended June 30, 2019 and 2018 are as follows (dollars in thousands):

	Three Months Ended								Six Months Ended
	June 30,								June 30,
	2019				2018				2019				2018
Laser systems	$	4,917	56.9	%	$	7,920	65.2	%	$	10,880	57.4	%	$	13,623	61.4	%
Imaging systems		63	0.7	%		371	3.1	%		615	3.2	%		954	4.3	%
Consumables and other		2,084	24.1	%		2,303	18.9	%		4,196	22.1	%		4,337	19.6	%
Services		1,578	18.3	%		1,557	12.8	%		3,273	17.3	%		3,254	14.7	%
License fees and royalties		3	—	%		3	—	%		7	—	%		6	—	%
Net revenue	$	8,645	100.0	%	$	12,154	100.0	%	$	18,971	100.0	%	$	22,174	100.0	%

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Description of Business and Basis of Presentation - Additional Information (Detail) $ in Thousands	May 10, 2018	Jun. 30, 2019 USD ($)	May 07, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Jun. 30, 2018 USD ($)	Dec. 31, 2017 USD ($)
Basis Of Presentation [Line Items]
Working capital		$ 13,800
Cash and cash equivalents, including restricted cash		4,032			$ 8,356	$ 3,146	$ 11,896
Accounts receivable		$ 9,740			$ 11,112
Reverse stock split ratio	0.2
SWK Loan
Basis Of Presentation [Line Items]
Line of credit facility, maximum borrowing capacity			$ 15,000	$ 12,500

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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)		6 Months Ended
	Jan. 02, 2019	Jun. 30, 2019	Jan. 01, 2019
Accounting Policies [Line Items]
Operating lease, right-of-use asset		$ 500,000
Operating lease liabilities		643,000
ASU 2016-02
Accounting Policies [Line Items]
Operating lease, right-of-use asset		800,000	$ 800,000
Operating lease right of use asset after adjustment for deferred rent		200,000
Operating lease liabilities		1,000,000	$ 1,000,000
Cumulative effect adjustment to retained earnings	$ 0	$ 0

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Revenue Recognition - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Revenue Recognition [Abstract]
Revenue from products and services transferred to customers, percentage	81.00%	87.00%	82.00%	85.00%
Revenue from services transferred to customers over time, percentage	19.00%	13.00%	18.00%	15.00%
Undelivered elements (product training, installation, product and support services)	$ 563		$ 563		$ 730
Revenue recognized from contract liability			300	$ 600
Extended warranties recognized			$ 400	$ 700

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Summary of Opening and Closing Balances of Contract Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Revenue Recognition [Abstract]
Undelivered elements (training, installation, product and support services)	$ 563	$ 730
Extended warranty contracts	1,945	1,735
Deferred royalties	5	11
Total deferred revenue	2,513	2,476
Deferred revenue — current	$ 2,513	$ 2,476

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Summary of Disaggregation of Revenues Related to Geographic Areas (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation Of Revenue [Line Items]
Net revenue	$ 8,645	$ 12,154	$ 18,971	$ 22,174
United States
Disaggregation Of Revenue [Line Items]
Net revenue	5,898	7,164	12,014	12,857
International
Disaggregation Of Revenue [Line Items]
Net revenue	$ 2,747	$ 4,990	$ 6,957	$ 9,317

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Summary of Revenues Disaggregated by Timing of Goods and Services Transferred (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation Of Revenue [Line Items]
Net revenue	$ 8,645	$ 12,154	$ 18,971	$ 22,174
Revenue Recognized Over Time
Disaggregation Of Revenue [Line Items]
Net revenue	1,646	1,557	3,415	3,254
Revenue Recognized at a Point in Time
Disaggregation Of Revenue [Line Items]
Net revenue	$ 6,999	$ 10,597	$ 15,556	$ 18,920

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Summary of Sales by End Market (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation Of Revenue [Line Items]
Net revenue	$ 8,645	$ 12,154	$ 18,971	$ 22,174
End-customer
Disaggregation Of Revenue [Line Items]
Net revenue	5,553	7,675	11,254	13,712
Distributors
Disaggregation Of Revenue [Line Items]
Net revenue	$ 3,092	$ 4,479	$ 7,717	$ 8,462

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Summary of Percentages of Sales by Product line (Detail) - Product Concentration Risk - Sales Revenue, Net	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation Of Revenue [Line Items]
Percentage of sales	100.00%	100.00%	100.00%	100.00%
Laser systems
Disaggregation Of Revenue [Line Items]
Percentage of sales	56.90%	65.20%	57.40%	61.40%
Imaging systems
Disaggregation Of Revenue [Line Items]
Percentage of sales	0.70%	3.10%	3.20%	4.30%
Consumables and Other
Disaggregation Of Revenue [Line Items]
Percentage of sales	24.20%	18.90%	22.20%	19.60%
Services
Disaggregation Of Revenue [Line Items]
Percentage of sales	18.20%	12.80%	17.20%	14.70%

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Stockholders' Equity - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018	May 10, 2018	May 09, 2018
Stockholders Equity [Line Items]
Description of reverse stock split			At BIOLASE’s annual meeting of stockholders on May 9, 2018 (the “2018 Annual Meeting”), BIOLASE stockholders approved an amendment to BIOLASE’s Restated Certificate of Incorporation, as amended, to effect the Reverse Stock Split of BIOLASE common stock and on May 10, 2018, the Company filed an amendment (the “Amendment”) to its Restated Certificate of Incorporation, as amended, with the Secretary of State of the State of Delaware to effect the Reverse Stock Split, effective as of 11:59 p.m. on May 10, 2018. The Amendment also reduced the authorized shares of common stock from 200,000,000 shares to 40,000,000 shares. Prior year share and per share amounts have been adjusted to reflect the impact of the Reverse Stock Split.
Common stock, shares authorized	40,000		40,000		40,000	40,000,000	200,000,000
Compensation expense related to stock options	$ 0.5	$ 0.6	$ 1.2	$ 1.3
Total unrecognized compensation expense	$ 1.6		$ 1.6
Unrecognized share based compensation expense to be recognized over weighted-average period			2 years
Outstanding stock options, RSUs and warrants excluded from diluted loss per share	5,700,000	3,800,000	5,700,000	3,800,000
2002 Stock Incentive Plan
Stockholders Equity [Line Items]
Common stock authorized for issuance	3,100,000		3,100,000
Common stock issued pursuant to options exercised			1,500,000
Options and restricted stock units outstanding	1,600,000		1,600,000
Options available for future grants	0		0
2018 Long-Term Incentive Plan
Stockholders Equity [Line Items]
Common stock authorized for issuance	5,000,000		5,000,000
Options and restricted stock units outstanding	1,400,000		1,400,000
Options available for future grants	3,600,000		3,600,000

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Classification of Compensation Expense Associated with Share-Based Payments (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Allocated Share-based Compensation Expense	$ 447	$ 557	$ 1,204	$ 1,258
Cost of Revenue
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Allocated Share-based Compensation Expense	54	105	136	162
Sales and Marketing
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Allocated Share-based Compensation Expense	78	154	238	234
General and Administrative
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Allocated Share-based Compensation Expense	283	207	724	674
Engineering and Development
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Allocated Share-based Compensation Expense	$ 32	$ 91	$ 106	$ 188

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Assumptions Used in Estimating Fair Value of Stock Options Granted (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions And Methodology [Abstract]
Expected term	6 years 1 month 6 days	5 years 8 months 12 days	6 years 1 month 6 days	5 years 10 months 24 days
Volatility	85.00%	81.20%	85.80%	81.40%
Risk-free interest rate	2.50%	2.71%	2.60%	2.46%

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Summary of Option Activity (Detail) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($) $ / shares shares
Shares
Beginning Balance | shares	1,623
Granted at fair market value | shares	70
Exercised | shares	(2)
Forfeited, cancelled, or expired | shares	(159)
Ending Balance | shares	1,532
Options exercisable at June 30, 2019 | shares	1,165
Vested options expired during the quarter ended June 30, 2019 | shares	14
Weighted Average Exercise Price
Beginning Balance | $ / shares	$ 6.54
Granted at fair market value | $ / shares	2.08
Exercised | $ / shares	2.10
Forfeited, cancelled, or expired | $ / shares	5.77
Ending Balance | $ / shares	6.42
Options exercisable at June 30, 2019 | $ / shares	7.56
Vested options expired during the quarter ended June 30, 2019 | $ / shares	$ 13.25
Weighted Average Remaining Contractual Term (Years)
Options outstanding	5 years 5 months 15 days
Options exercisable	4 years 7 months 9 days
Aggregate Intrinsic Value
Options outstanding | $	$ 16,200	[1]

[1] The intrinsic value calculation does not include negative values. This can occur when the fair market value on the reporting date is less than the exercise price of the grant.

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Summary of Unvested Stock Option Activity (Detail) - $ / shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Weighted Average Grant Date Fair Value
Granted	$ 1.53	$ 1.27	$ 1.53	$ 1.46
Stock Options
Shares
Beginning Balance			522
Granted			70
Vested			(147)
Forfeited or cancelled			(78)
Ending Balance	367		367
Weighted Average Grant Date Fair Value
Beginning Balance			$ 2.11
Granted			1.53
Vested			2.94
Forfeited or cancelled			2.62
Ending Balance	$ 1.56		$ 1.56

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Cash Proceeds Along with Fair Value Disclosures Related to Grants, Exercises and Vested Options (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Proceeds from stock options exercised			$ 3	$ 2
Weighted-average fair value of options granted during period	$ 1.53	$ 1.27	$ 1.53	$ 1.46
Total fair value of shares vested during the period	$ 90	$ 843	$ 431	$ 245

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Summary of Unvested Restricted Stock Units (Detail) - Restricted Stock Units (RSUs) shares in Thousands	6 Months Ended
	Jun. 30, 2019 $ / shares shares
Shares
Beginning Balance | shares	2,163
Granted | shares	97
Vested | shares	(794)
Forfeited or cancelled | shares	(213)
Ending Balance | shares	1,253
Weighted Average Grant Date Fair Value
Unvested RSUs at December 31, 2018 | $ / shares	$ 1.84
Granted | $ / shares	2.08
Vested | $ / shares	1.74
Forfeited or cancelled | $ / shares	2.37
Unvested RSUs at June 30, 2019 | $ / shares	$ 1.87

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Summary of Warrant Activity (Detail) - Warrants shares in Thousands	6 Months Ended
	Jun. 30, 2019 $ / shares shares
Shares
Beginning Balance | shares	1,934
Granted or Issued | shares	149
Ending Balance | shares	2,083
Warrants exercisable at June 30, 2019 | shares	2,083
Weighted Average Exercise Price
Beginning Balance | $ / shares	$ 6.62
Granted or Issued | $ / shares	2.22
Ending Balance | $ / shares	6.30
Warrants exercisable at June 30, 2019 | $ / shares	$ 6.30

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Components of Inventory (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Components of inventory, net of allowances
Raw materials	$ 3,909	$ 3,590
Work-in-process	1,342	1,435
Finished goods	7,083	7,223
Inventory	$ 12,334	$ 12,248

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Inventory - Additional Information (Detail) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
Inventory includes write-downs for excess and obsolete inventory	$ 1.1	$ 1.1

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Summary of Property, Plant, and Equipment (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Property Plant And Equipment [Line Items]
Property, plant, and equipment gross, excluding land	$ 10,292	$ 10,153
Accumulated depreciation and amortization	(8,872)	(8,344)
Property, plant, and equipment net, excluding land	1,420	1,809
Land	165	166
Property, plant, and equipment, net	1,585	1,975
Building
Property Plant And Equipment [Line Items]
Property, plant, and equipment gross, excluding land	211	213
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property, plant, and equipment gross, excluding land	2,004	2,004
Equipment and Computers
Property Plant And Equipment [Line Items]
Property, plant, and equipment gross, excluding land	7,423	7,277
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Property, plant, and equipment gross, excluding land	634	634
Construction in Progress
Property Plant And Equipment [Line Items]
Property, plant, and equipment gross, excluding land	$ 20	$ 25

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Property, Plant, and Equipment - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Property Plant And Equipment [Abstract]
Depreciation and amortization expenses	$ 0.3	$ 0.2	$ 0.5	$ 0.5

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Intangible Assets and Goodwill - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Intangible assets and goodwill impairment			$ 0
Goodwill	$ 2,926,000		2,926,000		$ 2,926,000
Amortization expense	$ 0	$ 0	$ 0	$ 0

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Components of Accrued Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Payables And Accruals [Abstract]
Payroll and benefits	$ 1,660	$ 2,400
Patent litigation settlement		1,500
Warranty accrual, current portion	764	861	$ 1,138
Lease liability	565
Accrued professional services	1,060	1,044
Taxes	412	714
Accrued insurance premium	44	328
Customer deposits	19	21
Other	375	670
Total accrued liabilities	$ 4,899	$ 7,538

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Changes in Initial Product Warranty Accrual and Expenses Under Initial and Extended Warranties (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Movement in Standard Product Warranty Accrual
Balance, beginning of period	$ 1,384	$ 1,214	$ 1,308	$ 1,190
Provision for estimated warranty cost	383	378	622	624
Warranty expenditures	(268)	(233)	(431)	(455)
Balance, June 30	1,499	1,359	1,499	1,359
Less warranty accrual, long-term	735	221	735	221	$ 447
Total warranty accrual, current portion	$ 764	$ 1,138	$ 764	$ 1,138	$ 861

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Accrued Liabilities - Additional Information (Detail) - Maximum	6 Months Ended
	Jun. 30, 2019
Diode Systems
Accrued Liabilities [Line Items]
Product warrant period	28 months
United States | Waterlase Laser Systems
Accrued Liabilities [Line Items]
Product warrant period	16 months
International | Waterlase Laser Systems
Accrued Liabilities [Line Items]
Product warrant period	28 months

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Debt - Summary of Principal Outstanding and Unamortized Discount (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Debt Disclosure [Abstract]
Term loan	$ 15,000	$ 12,500
Discount and debt issuance costs on term loan	(1,672)	(1,664)
Total long-term debt, net	$ 13,328	$ 10,836

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Debt - Additional Information (Detail)					6 Months Ended
	May 07, 2019 USD ($) Day $ / shares shares	Nov. 09, 2018 USD ($) Day $ / shares shares	Sep. 27, 2018 USD ($) $ / shares shares	Mar. 06, 2018 USD ($) $ / shares	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2019 USD ($)	Oct. 22, 2018 USD ($)	Aug. 13, 2018 USD ($)
Debt Instrument [Line Items]
Borrowings under lines of credit						$ 1,823,000
Repayments of lines of credit						1,823,000
Debt issuance costs					$ 38,000	$ 87,000
SWK Loan
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 15,000,000						$ 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 no less than $1.5 million or 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					$ 500,000
Weighted-average interest rate					12.70%
SWK Loan | LIBOR
Debt Instrument [Line Items]
Line of credit facility bearing floating interest rate per annum		10.00%
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.
Western Alliance Warrant
Debt Instrument [Line Items]
Warrants issued to purchase shares of common stock | shares			56,338
Warrants expire date			Sep. 27, 2028
Initial exercise price of warrants | $ / shares			$ 2.13
SWK Warrants
Debt Instrument [Line Items]
Warrants expiration period	8 years	8 years
Warrants fair value assumptions, expected volatility rate	80.73%	81.79%
Warrants fair value assumptions annual dividend per share | $ / shares	$ 0.00	$ 0.00
Warrants fair value assumptions, risk-free interest rate	2.37%	3.13%
Warrants, estimated fair value	$ 200,000	$ 400,000
Warrants issued to purchase shares of common stock | shares	115,175	372,023
Initial exercise price of warrants | $ / shares	$ 2.17	$ 1.34
Warrants expiration period	7 years	7 years
Number of trading days of average closing price of common stock | Day	10	10
DPG Warrants
Debt Instrument [Line Items]
Warrants expiration period	8 years	8 years
Warrants fair value assumptions, expected volatility rate	80.73%	81.79%
Warrants fair value assumptions annual dividend per share | $ / shares	$ 0.00	$ 0.00
Warrants fair value assumptions, risk-free interest rate	2.37%	3.13%
Warrants, estimated fair value	$ 100,000	$ 300,000
Warrants issued to purchase shares of common stock | shares	34,552	279,851
Initial exercise price of warrants | $ / shares	$ 2.17	$ 1.34
Finder's fee					$ 500,000
Warrants expiration period	7 years	7 years
Number of trading days of average closing price of common stock | Day	10	10
SWK Warrants and DPG Warrants
Debt Instrument [Line Items]
Warrants effective-interest method amortization period					5 years
Maximum | SWK Loan
Debt Instrument [Line Items]
Debt instrument covenants unencumbered liquid assets		$ 1,500,000
Business Financing Agreement
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity				$ 6,000,000
Line of credit facility expiration date				Mar. 06, 2020
Line of credit facility, interest rate description					Amounts outstanding under the Business Financing Agreement bore interest at a per annum floating rate equal to the greater of 4.5% or the “Prime Rate” published in the Money Rates section of the Western Edition of The Wall Street Journal (or such other rate of interest publicly announced from time to time by Western Alliance as its “Prime Rate”), plus 1.5% with respect to advances made under the line of credit, plus an additional 5.0% during any period that an event of default occurred and was continuing.
Line of credit facility, commitment fee amount				$ 67,500
Line of credit facility, commitment fee description					the Company paid the first of two annual commitment fees totaling $67,500, being 0.25% of the aggregate $6.0 million commitment for the Domestic Revolver and 1.75% of the aggregate $3.0 million commitment for the EXIM Revolver. The commitment fees and the legal costs associated with acquiring the credit facilities were capitalized and were amortized on a straight-line basis as interest expense over the term of the Business Financing Agreement
Business Financing Agreement | Western Alliance
Debt Instrument [Line Items]
Line of credit facility minimum unrestricted cash covenant								$ 300,000
Interest expense including debt issuance costs		100,000
Repayments of lines of credit		$ 900,000
Business Financing Agreement | Western Alliance Warrant
Debt Instrument [Line Items]
Warrants expiration period				10 years
Warrants fair value assumptions, expected volatility rate				91.49%
Warrants fair value assumptions annual dividend per share | $ / shares				$ 0.00
Warrants fair value assumptions, risk-free interest rate				2.88%
Warrants, estimated fair value				$ 100,000
Business Financing Agreement | Domestic Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity				$ 6,000,000
Maximum borrowing base percentage of eligible accounts receivable				75.00%
Line of credit facility commitment fee percentage				0.25%
Line of credit facility, commitment fee amount				$ 6,000,000
Business Financing Agreement | Export Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity				$ 3,000,000
Maximum borrowing base percentage of eligible accounts receivable				85.00%
Line of credit facility commitment fee percentage				1.75%
Line of credit facility, commitment fee amount				$ 3,000,000
Business Financing Agreement | Line of Credit
Debt Instrument [Line Items]
Variable interest Rate with respect to advances made				1.50%
Line of credit facility interest rate during period in event of default				5.00%
Business Financing Agreement | Line of Credit | Minimum
Debt Instrument [Line Items]
Line of credit facility bearing floating interest rate per annum				4.50%
Business Financing Modification Agreement | Western Alliance
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity			$ 2,500,000
Line of credit facility expiration date			Mar. 06, 2019
Line of credit facility default covenant advance									$ 1,500,000
Line of credit, outstanding borrowings			$ 1,500,000
Credit Agreement, First Amendment [Member] | SWK Loan
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 does not reach set minimum revenue levels for the three-month period ended June 30, 2019, and (c) require minimum liquidity of $1.5 million at all times. The First Amendment provides that if aggregate minimum revenue and EBITDA levels are not achieved by September 30, 2019, the minimum liquidity requirement will 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
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
Loan origination and other fees to be paid	100,000
Credit Agreement, First Amendment [Member] | SWK Warrants
Debt Instrument [Line Items]
Additional warrants to purchase common stock value	200,000
Credit Agreement, First Amendment [Member] | DPG Warrants
Debt Instrument [Line Items]
Additional warrants to purchase common stock value	100,000
Additional finders fee	$ 100,000

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Debt - Summary of Future Minimum Principal and Interest Payments (Detail) - USD ($) $ in Thousands		Jun. 30, 2019	Dec. 31, 2018
Debt Disclosure [Abstract]
2021		$ 2,100
2022		2,800
2023		10,100
Total future payments		15,000	$ 12,500
2019	[1]	936
2020	[1]	1,872
2021	[1]	1,654
2022	[1]	1,304
2023	[1]	955
Total future payments	[1]	$ 6,721

[1] estimated using LIBOR rates as at June 30, 2019

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Leases - Additional Information (Detail) - USD ($)		6 Months Ended
	Jan. 02, 2019	Jun. 30, 2019	Jan. 01, 2019
Lessee Lease Description [Line Items]
Operating lease, options to renew term		1 year
Lessee, Operating Lease, Existence of Option to Extend [true false]		true
Operating lease, right-of-use asset		$ 500,000
Operating lease, liability		$ 643,000
Lessee, operating lease incremental borrowing rate			12.78%
Operating lease, lease not yet commenced, description		The Company did not enter into any new lease arrangements nor did it have any arrangements that had not commenced.
ASU 2016-02
Lessee Lease Description [Line Items]
Operating lease, right-of-use asset		$ 800,000	$ 800,000
Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List			us-gaap:OtherAssetsNoncurrent
Adjustment for deferred rent			$ 200,000
Operating Lease, Liability, Statement of Financial Position [Extensible List]			us-gaap:AccruedLiabilitiesCurrent
Operating lease, liability		1,000,000	$ 1,000,000
Cumulative-effect adjustment to retained earnings	$ 0	$ 0
Minimum
Lessee Lease Description [Line Items]
Lease term		1 year
Maximum
Lessee Lease Description [Line Items]
Lease term		5 years
Lease initial term of contract		1 year

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Leases - Information related to Right-of-use Assets and Liabilities (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($)
Leases [Abstract]
Cash paid for operating lease liabilities	$ 414
Right-of-use assets obtained in exchange for new operating lease obligations	$ 803
Weighted-average remaining lease term	1 year 7 months 6 days
Weighted-average discount rate	12.80%

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Leases - Schedule of Maturities of Lease Liabilities (Detail) $ in Thousands	Jun. 30, 2019 USD ($)
Leases [Abstract]
2020	$ 622
2021	63
Total lease payments	685
Less imputed interest	(42)
Total lease liabilities	643
Current operating lease liabilities	565
Non-current lease liabilities	$ 78

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Leases - Future Minimum Rental Commitments Under Lease Agreements (Detail) $ in Thousands	Jun. 30, 2019 USD ($)
Leases [Abstract]
2019	$ 622
2020	63
Total future minimum lease obligations	$ 685

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Commitments and Contingencies - Additional Information (Detail) - USD ($)		1 Months Ended	3 Months Ended	6 Months Ended
	Jan. 25, 2019	Jan. 31, 2019	Jun. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Commitment And Contingencies [Line Items]
Contingent loss on patent litigation settlement			$ 190,000
Accrued liability			4,899,000	$ 4,899,000	$ 7,538,000
Settlement Agreement | Patent Litigation
Commitment And Contingencies [Line Items]
Settlement agreement date	January 25, 2019
Number of days litigation settlement to be paid in cash	5 days
Litigation settlement in cash	$ 500,000
Number of days litigation settlement shares to be issued	30 days
Litigation settlement share issued	500,000
Number of days litigation settlement to be paid in value of stock consideration	30 days
Settlement agreement, terms				The Company has agreed (i) to pay to CAO, within five days of the Effective Date, $500,000 in cash, (ii) to issue to CAO, within 30 days of the Effective Date, 500,000 restricted shares of common stock of the Company (the “Stock Consideration”), and (iii) to pay to CAO, within 30 days of December 31, 2021, an amount in cash equal to the difference (if positive) between $1,000,000 and the value of the Stock Consideration on December 31, 2021.
Litigation settlement amount in cash equal to difference between value of stock consideration	$ 1,000,000
Contingent loss on patent litigation settlement	$ 1,500,000
Payment for litigation settlement in cash		$ 500,000	200,000	$ 0
Accrued liability			$ 1,000,000	$ 1,000,000

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Segment Information - Additional Information (Detail) - Sales Revenue, Net - Customer	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Customer Concentration Risk | United States
Segment Reporting Information [Line Items]
Percentage of sales	68.00%		63.00%
Customer Concentration Risk | International
Segment Reporting Information [Line Items]
Percentage of sales	32.00%		37.00%
Geographic Concentration Risk | International
Segment Reporting Information [Line Items]
Number of customers which represented more than 10% of the Company's revenue	0	0	0	0

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Summary of Net Revenue by Geographic Location (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Net revenue	$ 8,645	$ 12,154	$ 18,971	$ 22,174
United States
Segment Reporting Information [Line Items]
Net revenue	5,898	7,164	12,014	12,857
International
Segment Reporting Information [Line Items]
Net revenue	$ 2,747	$ 4,990	$ 6,957	$ 9,317

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Summary of Property, Plant and Equipment by Geographic Location (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Property, plant, and equipment, net	$ 1,585	$ 1,975
United States
Segment Reporting Information [Line Items]
Property, plant, and equipment, net	1,290	1,673
International
Segment Reporting Information [Line Items]
Property, plant, and equipment, net	$ 295	$ 302

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Concentrations - Summary of Net Revenue from Various Products (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Concentration Risk [Line Items]
Net revenue	$ 8,645	$ 12,154	$ 18,971	$ 22,174
Product Concentration Risk | Sales Revenue, Net
Concentration Risk [Line Items]
Percentage of sales	100.00%	100.00%	100.00%	100.00%
Laser systems
Concentration Risk [Line Items]
Net revenue	$ 4,917	$ 7,920	$ 10,880	$ 13,623
Laser systems | Product Concentration Risk | Sales Revenue, Net
Concentration Risk [Line Items]
Percentage of sales	56.90%	65.20%	57.40%	61.40%
Imaging systems
Concentration Risk [Line Items]
Net revenue	$ 63	$ 371	$ 615	$ 954
Imaging systems | Product Concentration Risk | Sales Revenue, Net
Concentration Risk [Line Items]
Percentage of sales	0.70%	3.10%	3.20%	4.30%
Consumables and other
Concentration Risk [Line Items]
Net revenue	$ 2,084	$ 2,303	$ 4,196	$ 4,337
Consumables and other | Product Concentration Risk | Sales Revenue, Net
Concentration Risk [Line Items]
Percentage of sales	24.10%	18.90%	22.10%	19.60%
Services
Concentration Risk [Line Items]
Net revenue	$ 1,578	$ 1,557	$ 3,273	$ 3,254
Services | Product Concentration Risk | Sales Revenue, Net
Concentration Risk [Line Items]
Percentage of sales	18.30%	12.80%	17.30%	14.70%
License fees and royalties
Concentration Risk [Line Items]
Net revenue	$ 3	$ 3	$ 7	$ 6

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Concentrations - Additional Information (Detail) - Product Concentration Risk - Customer	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Concentration Risk [Line Items]
Number of customers which represented more than 10% of the Company's accounts receivable			1		1
Sales Revenue, Net
Concentration Risk [Line Items]
Number of customers which represented more than 10% of the Company's revenue	0	0	0	0
Concentration Risk Percentage	100.00%	100.00%	100.00%	100.00%
Account Receivable
Concentration Risk [Line Items]
Concentration Risk Percentage			10.00%		10.00%
Minimum | Sales Revenue, Net
Concentration Risk [Line Items]
Concentration Risk Percentage	10.00%	10.00%	10.00%	10.00%

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Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Liability for unrecognized tax benefit, including related estimates of penalties and interest	$ 0	$ 0	$ 0	$ 0
Income tax provision (benefit)	$ 28,000	$ 10,000	$ 42,000	$ 42,000
Projected annual effective tax rate	0.50%	(10.00%)	0.30%	0.80%
Statutory tax rate			21.00%