NOTE 1  BASIS OF PRESENTATION The Company BIOLASE, Inc. (BIOLASE and, together with its consolidated subsidiaries, the Company) incorporated in Delaware in 1987, 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. Use of Estimates The preparation of these consolidated financial statements in conformity with generally accepted accounting principles in the United States of America (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 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. Reclassifications The Company has reclassified certain immaterial amounts in prior years to conform to current years presentation. 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 Companys financial instruments, consisting of cash, cash equivalents, restricted cash, accounts receivable, accounts payable, accrued liabilities, and SWK Loan, approximate fair value because of the liquid or short-term nature of these items. Reverse Stock Split At the Companys annual meeting of stockholders on May 9, 2018 (the 2018 Annual Meeting), the Companys stockholders approved an amendment to its Restated Certificate of Incorporation to effect a reverse stock split of its common stock, at a ratio ranging from one-for-five to one-for-fifteen, with the final ratio to be determined by the Companys board of directors (the Board). Immediately after the 2018 Annual Meeting, the Board approved a one-for-five (1:5) reverse stock split of the outstanding shares of the BIOLASE common stock. On May 10, 2018, the Company filed an amendment (the Fourth Amendment) to its Restated Certificate of Incorporation with the Secretary of State of the State of Delaware to effect the reverse stock split and to reduce the authorized shares of common stock from 200,000,000 shares to 40,000,000 shares. Except as the context otherwise requires, all current and prior year share numbers (including common stock warrants) and share price amounts (including exercise prices and closing market prices) contained in these audited financial statements and notes thereto reflect the one-for-five reverse stock split. Additionally, in 2018 the Company recorded a reclassification of $0.1 million between common stock and additional paid-in capital, equal to the reduction in par value. 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 Companys 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 Companys 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 Companys foreign currency expenditures primarily consist of the cost of maintaining offices, consulting services, and employee-related costs. During the years ended December 31, 2018, 2017, and 2016, 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 Companys products outside the U.S. Liquidity and Managements Plans The Company has reported losses from operations of $20.9 million, $18.0 million, and $15.0 million for the years ended December 31, 2018, 2017, and 2016, respectively, and has not generated cash from operations for the years ended December 31, 2018, 2017, and 2016. During the years ended December 31, 2017 and 2016, the principal sources of liquidity for the Company were its net proceeds from the December 5, 2017, April 18, 2017 and August 8, 2016 sales by the Company of $11.4 million, $10.2 million, and $9.5 million, respectively, of unregistered shares of the Companys equity securities. During the year ended December 31, 2018, the Company also received liquidity from the Credit Agreement (as defined and described in Note 6) with SWK Funding, LLC which provided borrowings of $12.5 million, and the Business Financing Agreement (as defined and described in Note 6) with Western Alliance Bank, which provided borrowings up to $6.0 million. The Companys recurring losses, level of cash used in operations, potential need for additional capital, and the uncertainties surrounding our ability to raise additional capital, raises substantial doubt about its 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. At December 31, 2018, the Company had approximately $17.3 million in working capital. The Companys principal sources of liquidity at December 31, 2018 consisted of approximately $8.4 million in cash, cash equivalents, and restricted cash, and $11.1 million of net 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, the Company must increase sales of its products, control or potentially reduce expenses and establish profitable operations in order to generate cash from operations or obtain additional funds when needed. Additional capital requirements may depend on many factors, including, among other things, the rate at which the Companys 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. The Company cannot provide assurance that it will be able to successfully enter into any such equity or debt financings 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 its stockholders.