Cutera (CUTR) 10-K 18 Mar 19 2018 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Mar. 01, 2019	Jun. 30, 2018
Document Information [Line Items]
Entity Registrant Name	CUTERA INC
Entity Central Index Key	0001162461
Trading Symbol	cutr
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding (in shares)		14,014,511
Entity Public Float			$ 418
Entity Shell Company	false
Document Type	10-K
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Amendment Flag	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 26,052	$ 14,184
Marketable investments	9,523	21,728
Accounts receivable, net of allowance for doubtful accounts of $1,257 and $9, respectively	19,637	20,777
Inventories	28,014	28,782
Other current assets and prepaid expenses	3,972	2,903
Total current assets	87,198	88,374
Property and equipment, net	2,672	2,096
Deferred tax assets	457	19,055
Goodwill	1,339	1,339
Other long-term assets	5,971	374
Total assets	97,637	111,238
Current liabilities:
Accounts payable	11,279	7,002
Accrued liabilities	23,300	26,848
Extended warranty liabilities	3,159
Deferred revenue	9,882	9,461
Total current liabilities	47,620	43,311
Deferred revenue, net of current portion	2,684	2,195
Income tax liability	394	379
Other long-term liabilities	553	460
Total liabilities	51,251	46,345
Commitments and contingencies (Note 11)
Stockholders’ equity:
Common stock, $0.001 par value: Authorized: 50,000,000 shares; Issued and outstanding: 13,968,852 and13,477,973 shares at December 31, 2018 and 2017, respectively	14	13
Additional paid-in capital	70,451	62,025
Retained earnings (accumulated deficit)	(24,010)	2,947
Accumulated other comprehensive loss	(69)	(92)
Total stockholders’ equity	46,386	64,893
Total liabilities and stockholders’ equity	$ 97,637	$ 111,238

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accounts receivable, allowance for doubtful accounts	$ 1,257	$ 9
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized (in shares)	50,000,000	50,000,000
Common stock, issued (in shares)	13,968,852	13,477,973
Common stock, outstanding (in shares)	13,968,852	13,477,973

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018		Dec. 31, 2017	Dec. 31, 2016
Net revenue:
Revenue from Contract with Customer, Including Assessed Tax	$ 162,720		$ 151,493	$ 118,056
Cost of revenue:
Cost of revenue	82,338		65,383	49,921
Gross profit	80,382		86,110	68,135
Operating expenses:
Sales and marketing	58,420		52,070	41,563
Research and development	14,359		12,874	11,232
General and administrative	20,995		14,090	12,943
Lease termination income			(4,000)
Total operating expenses	93,774		75,034	65,738
Income (loss) from operations	(13,392)		11,076	2,397
Interest and other income(expense), net	(123)	[1]	884	323
Income (loss) before income taxes	(13,515)		11,960	2,720
Income tax (benefit) provision	17,255		(18,033)	143
Net income (loss)	$ (30,770)		$ 29,993	$ 2,577
Net loss per share:
Basic (in dollars per share)	$ (2.23)		$ 2.16	$ 0.19
Diluted (in dollars per share)	$ (2.23)		$ 2.04	$ 0.19
Weighted-average number of shares used in per share calculations:
Basic (in shares)	13,771		13,873	13,225
Diluted (in shares)	13,771		14,728	13,753
Product [Member]
Net revenue:
Revenue from Contract with Customer, Including Assessed Tax	$ 142,535		$ 132,660	$ 99,028
Cost of revenue:
Cost of revenue	66,843		56,363	40,149
Operating expenses:
Sales and marketing	58,420
Service [Member]
Net revenue:
Revenue from Contract with Customer, Including Assessed Tax	20,185		18,833	19,028
Cost of revenue:
Cost of revenue	$ 15,495		$ 9,020	$ 9,772
[1]	Included in interest and other income, net, is the estimated interest expense for advance payment related to service contracts under the new revenue standard.

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net income (loss)	$ (30,770)	$ 29,993	$ 2,577
Available-for-sale investments
Net change in unrealized gain (loss) on available-for-sale investments	14	(15)	30
Less: Reclassification adjustment for net gains on investments recognized during the year	9	(5)	(3)
Net change in unrealized gain (loss) on available-for-sale investments	23	(20)	27
Tax provision			10
Other comprehensive income (loss), net of tax	23	(20)	17
Comprehensive income (loss)	$ (30,747)	$ 29,973	$ 2,594

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Dec. 31, 2015	12,980,807
Balance at Dec. 31, 2015	$ 13	$ 79,782	$ (29,672)	$ (89)	$ 50,034
Deferred tax relating to adoption of ASU 2016-09 at Dec. 31, 2015			49		49
Issuance of common stock for employee purchase plan (in shares)	79,922
Issuance of common stock for employee purchase plan		768			$ 768
Exercise of stock options (in shares)	1,051,138				1,051,138
Exercise of stock options	$ 1	9,342			$ 9,342
Issuance of common stock in settlement of restricted and performance stock units, net of shares withheld for employee taxes, and stock awards (in shares)	116,833
Issuance of common stock in settlement of restricted and performance stock units, net of shares withheld for employee taxes, and stock awards		(618)			(618)
Repurchase of common stock (in shares)	(455,311)
Repurchase of common stock		(4,873)			(4,873)
Stock-based compensation expense		3,713			3,713
Net income (loss)			2,577		2,577
Net change in unrealized loss on available-for-sale investments				17	17
Balance (in shares) at Dec. 31, 2016	13,773,389
Balance at Dec. 31, 2016	$ 14	88,114	(27,046)	(72)	61,010
Issuance of common stock for employee purchase plan (in shares)	78,479
Issuance of common stock for employee purchase plan		1,059			$ 1,059
Exercise of stock options (in shares)	488,398				488,398
Exercise of stock options		4,376			$ 4,376
Issuance of common stock in settlement of restricted and performance stock units, net of shares withheld for employee taxes, and stock awards (in shares)	160,309
Issuance of common stock in settlement of restricted and performance stock units, net of shares withheld for employee taxes, and stock awards		(1,469)			(1,469)
Repurchase of common stock (in shares)	(1,022,602)
Repurchase of common stock	$ (1)	(35,165)			(35,166)
Stock-based compensation expense		5,110			5,110
Net income (loss)			29,993		29,993
Net change in unrealized loss on available-for-sale investments				(20)	$ (20)
Balance (in shares) at Dec. 31, 2017	13,477,973				13,477,973
Balance at Dec. 31, 2017	$ 13	62,025	2,947	(92)	$ 64,893
Issuance of common stock for employee purchase plan (in shares)	64,511
Issuance of common stock for employee purchase plan	$ 1	1,680			$ 1,680
Exercise of stock options (in shares)	271,902				271,902
Exercise of stock options		2,718			$ 2,718
Issuance of common stock in settlement of restricted and performance stock units, net of shares withheld for employee taxes, and stock awards (in shares)	154,466
Issuance of common stock in settlement of restricted and performance stock units, net of shares withheld for employee taxes, and stock awards		(3,128)			(3,128)
Stock-based compensation expense		7,157			7,157
Net income (loss)			(30,770)		(30,770)
Net change in unrealized loss on available-for-sale investments				23	23
Adjustment to opening balance for ASC 606 adoption at Dec. 31, 2017			3,813		$ 3,813
Balance (in shares) at Dec. 31, 2018	13,968,852				13,968,852
Balance at Dec. 31, 2018	$ 14	$ 70,451	$ (24,010)	$ (69)	$ 46,386

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net income (loss)	$ (30,770)	$ 29,993	$ 2,577
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Stock-based compensation	7,157	5,110	3,713
Depreciation and amortization	1,209	1,016	982
Amortization of contract acquisition costs	1,834
Change in deferred tax assets	17,438	(18,678)	22
Provision for doubtful accounts receivable	(1,257)	1
Other	241	(51)	(7)
Changes in assets and liabilities:
Accounts receivable	(117)	(4,229)	(4,899)
Inventories	768	(13,805)	(2,899)
Other current assets and prepaid expenses	(1,070)	(591)	(432)
Other long-term assets	(2,754)	6	4
Accounts payable	4,277	4,404	639
Accrued liabilities	(3,781)	9,345	3,461
Extended warranty liabilities	3,159
Other long-term liabilities	140		(329)
Deferred revenue	1,305	1,557	(826)
Income tax liability	15	211	(14)
Net cash provided by operating activities	308	14,287	1,992
Cash flows from investing activities:
Acquisition of property, equipment and software*	(1,488)	(855)	(537)
Disposal of property and equipment	41	53	20
Proceeds from sales of marketable investments	13,044	33,640	9,008
Proceeds from maturities of marketable investments	10,050	45,812	25,810
Purchase of marketable investments	(10,874)	(60,956)	(37,693)
Net cash provided by (used in) investing activities	10,773	17,694	(3,392)
Cash flows from financing activities:
Repurchase of common stock		(35,167)	(4,873)
Proceeds from exercise of stock options and employee stock purchase plan	4,399	5,435	10,111
Taxes paid related to net share settlement of equity awards	(3,129)	(1,469)	(618)
Payments on capital lease obligation	(483)	(371)	(313)
Net cash provided by (used in) financing activities	787	(31,572)	4,307
Net increase (decrease) in cash and cash equivalents	11,868	409	2,907
Cash and cash equivalents at beginning of year	14,184	13,775	10,868
Cash and cash equivalents at end of year	26,052	14,184	13,775
Supplemental cash flow information:
Cash paid for interest	85	70	43
Cash paid for income taxes	472	220	222
Supplemental non-cash investing and financing activities:
Assets acquired under capital lease	$ 610	$ 365	$ 801

Note 1 - Summary of Significant

Note 1 - Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block]	NOTE 1—SUMMARY Description of Operations and Principles of Consolidation Cutera, Inc. (“Cutera” or the “Company”) is a global provider of laser and energy-based aesthetic systems for practitioners worldwide. The Company designs, develops, manufactures, distributes and markets light and energy-based product platforms for use by physicians and other qualified practitioners, enabling them to offer safe and effective aesthetic treatments to their customers. The Company currently markets the following system platforms: excel, enlighten, Juliet, Secret RF, truSculpt xeo Titan, truSculpt 3D truSculpt iD Juliet Secret RF third Titan , truSculpt 3D truSculpt iD Headquartered in Brisbane, California, the Company has wholly-owned subsidiaries that are currently operational in Australia, Belgium, Canada, France, Germany, Hong Kong, Japan, Spain, Switzerland and the United Kingdom. The Company’s wholly owned subsidiary in Italy is currently dormant. These active subsidiaries market, sell and service the Company’s products outside of the United States. The Consolidated Financial Statements include the accounts of the Company and its subsidiaries. All inter-company transactions and balances have been eliminated. Use of Estimates The preparation of Consolidated Financial Statements in conformity with Generally Accepted Accounting Principles (“GAAP”) requires the Company’s management to make estimates and assumptions that affect the amounts reported of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial Statements and the accompanying notes, and the reported amounts of revenue and expenses during the reported periods. Actual results could differ materially from those estimates. On an ongoing basis, management evaluates its estimates, including those related to warranty obligations, sales commission, accounts receivable and sales allowances, valuation of inventories, fair values of goodwill, useful lives of property and equipment, assumptions regarding variables used in calculating the fair value of the Company's equity awards, expected achievement of performance based vesting criteria, fair value of investments, the standalone selling price of the Company's products and services, the customer life and period of benefit used to capitalize and amortize contracts acquisition costs, variable consideration, contingent liabilities, recoverability of deferred tax assets, and effective income tax rates, among others. Management bases estimates on historical experience and on various other assumptions that are believed to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities. R isks and Uncertainties The Company's future results of operations involve a number of risks and uncertainties. Factors that could affect the Company's future operating results and cause actual results to vary materially from expectations include, but are not Comparability The Company adopted the new revenue standard effective January 1, 2018, not December 31, 2018 December 31, 2018 December 31, 2017. December 31, 2018 December 31, 2017 not December 31, 2018 December 31, 2017. Recent Accounting Pronouncements Not In February 2016, 2016 02, 842 July 2018, 2018 11, 2016 02 2018 2018 11 not July 2018, 2018 10, 842, 2016 02. 2016 02 January 1, 2019 The Company will adopt ASC Topic 842 January 1, 2019, not not The Company expects that this standard will have a material effect on our financial statements. While the Company continues to assess all of the effects of adoption, the Company currently believes the most significant effects relate to the recognition of new right-of-use (“ROU”) assets and lease liabilities on our balance sheet for our auto, office, and embedded leases; and the requirement to provide significant new disclosures about our leasing activities. Upon the adoption of ASC Topic 842, $10.0 $11.0 The new standard also provides practical expedients for an entity’s ongoing accounting. The Company will elect the short-term lease recognition exemption for all leases that qualify. This means, for those leases that qualify, the Company will not not not not Recently Adopted Accounting Pronouncements In May 2014, 2014 09, 606, December 15, 2017, December 15, 2016. first 2018 not See “Revenue Recognition,” for additional accounting policy and transition disclosures. On January 26, 2017, No. 2017 04, 350 one not 2 two 350 20 35 3A The amendment is effective for the Company for its fiscal years beginning after December 15, 2019. January 1, 2017 ( 350 20 65 3 2017 04—Intangibles—Goodwill 350 October 1, 2018. no See ” Goodwill and Other Intangible Assets” in Note 3 In June 2018, No. 2018 07, 718 1 2 3 606. December 15, 2018, no 606. January 1, 2019 not Revenue The Company adopted ASC Topic 606, January 1, 2018, not January 1, 2018. January 1, 2018 606, not 606. Upon adoption of ASC Topic 606, $3.8 14 January 1, 2018 first 2018: ● $237,000 ● $151,000 one ● $210,000 ● $4.7 2.5 ● $1.2 606 The following table summarizes the effects of adopting ASC Topic 606 December 31, 2018: As reported under ASC Topic 606 Adjustments Balances under Prior GAAP (In thousands) Other long-term assets $ 5,971 $ (5,217) $ 754 Deferred revenue 12,566 (106) 12,460 Retained earnings (deficit) (24,010) 4,610 (19,400) The following table summarizes the effects of adopting ASC Topic 606 December 31, 2018: As reported under Topic 606 Adjustments Balances under Prior GAAP (In thousands) Products revenue $ 142,535 $ 274 $ 142,261 Service revenue 20,185 280 19,905 Sales and marketing 58,420 540 58,960 Interest and other income, net* (123) 297 174 * Included in interest and other income, net, is the estimated interest expense for advance payment related to service contracts under the new revenue standard. Adoption of the standard had no As part of the Company's adoption of ASC Topic 606, not one one not not Revenue recognition Revenue recognition- Period before January 1, 2018 - 606 The Company recognized revenue under ASC Topic 605 606 January 1 2018. 605, ● Persuasive evidence of an arrangement exists; ● The price is fixed or determinable; ● Delivery has occurred or services have been rendered; and ● Collectability is reasonably assured. Transfer of title and risk of ownership occurs when the product is shipped to the customer or when the customer receives the product, depending on the nature of the arrangement. Revenue is recorded net of customer and distributor discounts. When collectability is not not Multiple-element Arrangements A multiple-element arrangement includes the sale of one one For multiple-element arrangements, judgments are required as to the allocation of the proceeds received from an arrangement to the multiple elements of the arrangement. For multiple element arrangements the Company allocates revenue to all deliverables based on their relative selling prices in accordance with the FASB Accounting Standards Codification (“ASC”) 605 25. third not With respect to the sale of its earlier generation of the truSculpt truSculpt not truSculpt truSculpt Customer Marketing Arrangements The Company has a customer marketing and incentive program called “Cutera Bucks” for its North America customers through which it offers various sales incentives and discounts and pays or reimburses customers for qualifying expenses associated with practice set-up, advertising procedures related to the system purchased, and other expenses. The Company records such incentives as a reduction of revenue at the time when the sale of the system is recorded. Service Revenue The Company also offers customers extended service contracts. Revenue under service contracts is recognized on a straight-line basis over the period of the applicable service contract. Revenue from services performed in the absence of a service contract, including installation and training revenue, is recognized when the related services are performed and collectability is reasonably assured. Service revenue billed on a time and material basis, from customers whose systems are not December 31, 2017 2016 $18.8 $19.0 Bill and Hold Arrangement Under ASC 605 2017 one third no $938,000 2017. no 2016. Revenue recognition- Period after January 1, 2018 - 606 Revenue is recognized upon transfer of control of promised products or services to customers in an amount that reflects the consideration to which the Company expects to be entitled in exchange for promised goods or services. The Company’s performance obligations are satisfied either over time or at a point in time. Revenue from performance obligations that are transferred to customers over time accounted for approximately 12% twelve December 31, 2018. The Company has certain system sale arrangements that contain multiple products and services. For these bundled sale arrangements, the Company accounts for individual products and services as separate performance obligations if they are distinct. The Company’s products and services are distinct if a customer can benefit from the product or service on its own or with other resources that are readily available to the customer, and if the Company’s promise to transfer the products or service to the customer is separately identifiable from other promises in the contract. The Company’s system sale arrangements include a combination of the following performance obligations: the system and software license (considered as one For the Company’s system sale arrangements that include an extended service contract, the period of service commences at the expiration of the Company’s standard warranty offered at the time of the system sale. The Company considers the extended service contracts terms in the arrangements that are legally enforceable to be performance obligations. Other than extended service contracts and marketing services (which are satisfied over time), the Company generally satisfies all of the performance obligations at a point in time. Systems, system accessories (hand pieces), training, time and materials services are also sold on a stand-alone basis, and related performance obligations are satisfied at a point in time. For contracts with multiple performance obligations, the Company allocates the transaction price of the contract to each performance obligation on a relative standalone selling price basis. Nature of Products and Services Systems System revenue represents the sale of a system or an upgrade of an existing system. A system consists of a console that incorporates a universal graphic user interface, a laser or other energy based module, control system software and high voltage electronics, as well as one Pearl Pearl Fractional The Company offers customers the ability to select the system that best fits their practice at the time of purchase and then to cost-effectively add applications to their system as their practice grows. This provides customers the flexibility to upgrade their systems whenever they choose and provides the Company with a source of additional Systems revenue. The Company concludes that the system or upgrade and the right to use the embedded software represent a single performance obligation as the software license is integral to the functionality of the system or upgrade. The Company does not enlighten enlighten enlighten For systems sold directly to end-customers that are credit approved, revenue is recognized when the Company transfers control to the end-customer, which occurs when the product is shipped to the customer or when the customer receives the product, depending on the nature of the arrangement. The Company recognizes revenue on a cash basis for system sales to international direct end-customer sales that have not The Company typically receives payment for its system consoles and other accessories within 30 Skincare products The Company sells third third third Consumables (Other accessories) The Company treats its customers' purchases of replacement Titan truSculpt 3D truSculpt iD Juliet Secret RF truSculpt Extended contract services The Company offers post-warranty services to its customers through extended service contracts that cover parts and labor for a term of one, two, or three Training Sales of system to customers include training on the system to be provided within 180 not Customer Marketing Support In North America, the Company offers marketing and consulting phone support to its customers who purchase truSculpt 3D truSculpt iD six six Significant Judgments The Company combines two The Company is required to estimate the total consideration expected to be received from contracts with customers. In limited circumstances, the consideration expected to be received is variable based on the specific terms of the contract The Company has not The Company determines standalone selling price ("SSP") for each performance obligation as follows: Systems: The SSPs for systems are based on directly observable sales in similar circumstances to similar customers. When SSP is not Training: SSP is based on observable price when sold on a standalone basis. Extended warranty/Service contracts: SSP is based on observable price when sold on a standalone basis (by customer type). Customer Marketing Support: SSP is estimated based on cost plus a margin. Set-up /Installation: Set-up or installation for all other systems (excluding the enlighten system) is immaterial in the context of the contract as the set-up or installation for systems other than enlighten. The related costs to complete set-up or installation are immaterial. The calibration and installation service of the enlighten system are treated as separate performance obligations because the Company regularly sells enlighten systems without the calibration and installation service. Loyalty Program The Company launched a customer loyalty program during the third 2018 fifth 5 th The fair value of the reward earned by loyalty program members is included in accrued liabilities and recorded as a reduction of net sales at the time the reward is earned. Cash Equivalents, and Marketable Investments The Company invests its cash primarily in money market funds and in highly liquid debt instruments of U.S. federal and municipal governments and their agencies, commercial paper and corporate debt securities. All highly liquid investments with stated maturities of three three The Company determines the appropriate classification of its investments in marketable securities at the time of purchase and re-evaluates such designation at each balance sheet date. The Company’s marketable securities have been classified and accounted for as available-for-sale securities. Investments with remaining maturities of more than one 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 at the measurement date. In determining fair value, the Company utilizes valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible as well as considers counterparty credit risk in its assessment of fair value. The Company’s financial instruments include cash equivalents, accounts receivable, accounts payable and accrued liabilities. Carrying amounts of the Company's financial instruments, approximate their fair values as of the balance sheet dates given their generally short maturities. The fair value hierarchy distinguishes between ( 1 2 three 1 3 three 820: ● Level 1: ● Level 2: not 2 not ● Level 3: no In determining fair value, the Company utilizes valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible. The Company also considers counterparty credit risk in its assessment of fair value. Impairment of Marketable Investments After determining the fair value of available-for-sales debt instruments, gains or losses on these securities are recorded to other comprehensive income, until either the security is sold or the Company determines that the decline in value is other-than-temporary. The primary differentiating factors that the Company considers in classifying impairments as either temporary or other-than-temporary impairments are the Company’s intent and ability to retain the investment in the issuer for a period of time sufficient to allow for any anticipated recovery in market value or the maturity of the investment, the length of the time and the extent to which the market value of the investment has been less than cost and the financial condition and near-term prospects of the issuer. There were no December 31, 2018, 2017, 2016. Allowance for Sales Returns and Doubtful Accounts The allowance for sales returns is based on the Company’s estimates of potential future product returns and other allowances related to current period product revenue. The Company analyzes historical returns, current economic trends and changes in customer demand and acceptance of the Company's products. In cases where the Company is aware of circumstances that may Concentration of Credit Risk and Other Risks and Uncertainties The Company operates in markets that are highly competitive and rapidly changing. Significant technological changes, shifting customer needs, the emergence of competitive products or services with new capabilities and other factors could negatively impact our operating results. The Company is also subject to risks related to changes in the value of our significant balance of financial instruments. Financial instruments that potentially subject the Company to concentrations of risk consist principally of cash, cash equivalents, marketable investments and accounts receivable. The Company’s cash and cash equivalents are primarily invested in deposits and money market accounts with three may not The Company invests in debt instruments, including bonds of the U.S. Government, its agencies and municipalities. The Company has also invested in other high grade investments such as commercial paper and corporate debt securities. The Company has established guidelines relative to credit ratings, diversification and maturities that seek to maintain safety and liquidity. By policy, the Company restricts its exposure to any single issuer by imposing concentration limits. To minimize the exposure due to adverse shifts in interest rates, the Company maintains investments at an average maturity of generally less than twelve Accounts receivable are recorded net of an allowance for doubtful accounts, and are typically unsecured and are derived from revenue earned from worldwide customers. The Company controls credit risk through credit approvals, credit limits, and monitoring procedures. The Company performs credit evaluations of its customers and maintains reserves for potential credit losses. As of December 31, 2018 2017, one 4.9% December 31, 2018, 2017, 2016, 62%, 62%, 55%, 37%, 38%, 45%, No 10% December 31, 2018, 2017, 2016. Supplier concentration The Company relies on third third may Inventories Inventories are stated at the lower of cost and net realizable value, cost being determined on a standard cost basis which approximates actual cost on a first first The Company includes demonstration units within inventories. Demonstration units are carried at cost and amortized over an estimated economic life of two As of December 31, 2018 2017, $2.9 $1.9 Property and Equipment Property and equipment are stated at cost, net of accumulated depreciation. Depreciation expense recognized is on a straight-line basis over the estimated useful lives of the assets, generally as follows: Useful Lives Leasehold improvements Lesser of useful life or term of lease Office equipment and furniture (in years) 3 Machinery and equipment (in years) 3 Upon sale or retirement of property and equipment, the costs and related accumulated depreciation and amortization are removed from the balance sheet and the resulting gain or loss is reflected in operating expenses. Maintenance and repairs are charged to operations as incurred. Depreciation expense related to property and equipment for 2018, 2017 2016, $1.2 $1.0 $0.8 Goodwill and Intangible Assets Goodwill and intangible assets with indefinite useful lives are not fourth may no The Company continues to operate in one December 31, 2018, no December 31, 2018. Warranty Obligations The Company offers post-warranty services to its customers through extended service contracts that cover replacement parts and labor for a term of one, two, or three 14 16 The Company also offers services on a time-and-materials basis for detachable hand piece replacements, parts and labor. These post-warranty services serve as additional sources of recurring revenue from the Company’s installed product base. Deferred Sales Commissions Incremental costs of obtaining a contract, including sales commissions, are capitalized and amortized on a straight-line basis over the expected customer relationship period. The Company uses the portfolio method to recognize the amortization expense related to these capitalized costs related to initial contracts and such expense is recognized over a period associated with the revenue of the related portfolio, which is generally two three Total capitalized costs for the year ended December 31, 2018 $5.2 $1.8 December 31, 2018 Cost of Revenue Cost of revenue consists primarily of material, finished and semi-finished products purchased from third The Company's system sales include a control console, universal graphic user interface, control system software, high voltage electronics and a combination of applications (referred to as hand pieces). Hand pieces are programmed to have a limited number of uses to ensure the safety of the device to patients. The Company sells refurbished hand pieces, or "refills," of its Titan truSculpt 3D Research and Development Expenditures Research and development costs are expensed as incurred and include costs related to research, design, development, testing of products, salaries, benefits and other headcount related costs, facilities, material, third Advertising Costs Advertising costs are included as part of sales and marketing expense and are expensed as incurred. Advertising expenses for 2018, 2017 2016 $2.8 $1.8 $1.3 Stock-based Compensation The Company accounts for share-based employee compensation plans using the fair value recognition and measurement provisions under U.S. GAAP. The Company’s share-based compensation cost is measured at the grant date, based on the fair value of the award, and is recognized as expense on a straight-line basis over the requisite service period. The Company estimates expected forfeitures at the time of grant and revises, if necessary, in subsequent periods if actual forfeitures differ from those estimated. Expected Term Expected Volatility: 50 50 Risk-Free Interest Rate: ● The fair value of stock options ("options") on the grant date is estimated using the Black-Scholes option-pricing model using the single-option approach. The Black-Scholes option pricing model requires the use of highly subjective and complex assumptions, including the option's expected term and the price volatility of the underlying stock, to determine the fair value of award. The Company recognizes the expense associated with options using a single award approach over the requisite service period. The Company accounts for all stock options awarded to non-employees at the fair value of the consideration received or the fair value of the equity instrument issued, as calculated using the Black-Scholes model. ● The fair value of restricted stock units is determined based on the closing quoted 50 ● The fair value of Performance Stock Units (“PSUs”) that have operational measurement goals, are measured at the 50 may not See Note 9 Income Taxes The Company is subject to taxes on earnings in both the U.S. and various foreign jurisdictions. As a global taxpayer, significant judgments and estimates are required in evaluating our uncertain tax positions and determining our provision for income taxes on earnings. The Company recognizes tax benefits from uncertain tax positions only if it is more likely than not 50% The Company’s effective tax rates have differed from the statutory rate primarily due to changes in the valuation allowance, foreign operations, research and development tax credits, state taxes, and certain benefits realized related to stock option activity. The Company’s current effective tax rate does not Undistributed earnings of the Company’s foreign subsidiaries at December 31, 2018 no 2017 not not In December 2017, No. 118, 118” not one 2017 fourth 2017, December 31, 2017. 2017 fourth 2018. 2017 December 31, 2018. $0.4 $7.3 $0.4 118. In January 2018, 2017 Computation of Net Income ( Loss) per Share Basic net income per share is computed using the weighted average number of shares outstanding during the period. Diluted net income per share is computed using the weighted average number of the Company’s shares and dilutive potential shares outstanding during the period. Dilutive potential shares primarily consist of employee stock options, restricted stock units, and shares to be purchased by employees under the Company’s employee stock purchase plan. GAAP requires that employee equity share options, non-vested shares, and similar equity instruments granted by the Company be treated as potential common shares outstanding in computing diluted earnings per share. Diluted shares outstanding include the dilutive effect of equity awards, which is calculated based on the average share price for each fiscal period using the treasury stock method. Under the treasury stock method, the amount the employee must pay for exercising stock options and the amount of compensation cost for future service that the Company has not Comprehensive Income (Loss) Comprehensive income (loss) includes all changes in stockholders’ equity except those resulting from investments or contributions by stockholders. For the periods presented, the accumulated other comprehensive income (loss) consisted solely of the unrealized gains or losses on the Company's available for- sale investments, net of tax. Foreign Currency The U.S. Dollar is the functional currency of the Company’s subsidiaries. Monetary assets and liabilities are re-measured into U.S. Dollars at the applicable period end exchange rate. Sales and operating expenses are re-measured at average exchange rates in effect during each period. Gains or losses resulting from foreign currency transactions are included in net income (loss) and are insignificant for each of the three December 31, 2017. three December 31, 2018. Segments The Company operates in one one not December 31, 2018, 2017, 89% 98% 13

Note 2 - Investment Securities

Note 2 - Investment Securities	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Cash, Cash Equivalents, and Marketable Securities [Text Block]	NOTE 2 —INVESTMENT SECURITIES The following tables summarize cash, cash equivalents and marketable securities (in thousands): December 31, 201 8 20 1 7 Cash and cash equivalents: Cash $ 21,969 $ 14,058 Cash equivalents: Money market funds 4,083 126 Total cash and cash equivalents 26,052 14,184 Marketable securities: U.S. government notes 1,397 11,870 U.S. government agencies 2,677 — Municipal securities 200 200 Commercial paper 2,433 1,833 Corporate debt securities 2,816 7,825 Total marketable securities 9,523 21,728 Total cash, cash equivalents and marketable securities $ 35,575 $ 35,912 The following table summarizes unrealized gains and losses related to the Company’s marketable investments (in thousands): December 31, 201 8 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Market Value Cash and cash equivalents $ 26,052 $ — $ — $ 26,052 Marketable investments U.S. government notes 1,397 — — 1,397 U.S. government agencies 2,677 — — 2,677 Municipal securities 200 — — 200 Commercial paper 2,433 — — 2,433 Corporate debt securities 2,825 — (9 ) 2,816 Total marketable securities 9,532 (9 ) 9,523 Total cash, cash equivalents and marketable securities $ 35,584 $ $ (9 ) $ 35,575 December 31, 201 7 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Market Value Cash and cash equivalents $ 14,184 $ — $ — $ 14,184 Marketable investments U.S. government notes 11,885 — (15 ) 11,870 Municipal securities 201 — (1 ) 200 Commercial paper 1,836 — (3 ) 1,833 Corporate debt securities 7,838 2 (15 ) 7,825 Total marketable securities 21,760 2 (34 ) 21,728 Total cash, cash equivalents and marketable securities $ 35,944 $ 2 $ (34 ) $ 35,912 No 12 December 31, 2018 2017. The unrealized losses on the available-for-sale investments are related to corporate securities and government securities. The Company determined these unrealized losses to be temporary. Factors considered in determining whether a loss is temporary included the length of time and extent to which the investment’s fair value has been less than the cost basis; the financial condition and near-term prospects of the investee; extent of the loss related to credit of the issuer; the expected cash flows from the security; the Company’s intent to sell the security; and whether or not The following table summarizes the estimated fair value of the Company’s marketable investments classified by the contractual maturity date of the security as of December 31, 2018 ( Amount Due in less than one year $ 9,121 Due in 1 to 3 years 402 Total marketable securities $ 9,523 Fair Value Measurements The following table summarizes financial assets measured and recognized at fair value on a recurring basis and classified under the appropriate level of the fair value hierarchy as described above (in thousands): December 31, 201 8 Level 1 Level 2 Level 3 Total Cash equivalents: Money market funds $ 4,083 $ — $ — $ 4,083 Short term marketable investments: Available-for-sale securities — 9,523 — 9,523 Total assets at fair value $ 4,083 $ 9,523 $ — $ 13,606 December 31, 201 7 Level 1 Level 2 Level 3 Total Cash equivalents: Money market funds $ 126 $ — $ — $ 126 Commercial paper — — — — Short term marketable investments: Available-for-sale securities — 21,728 — 21,728 Total assets at fair value $ 126 $ 21,728 $ — $ 21,854 The Company’s Level 1 2 may two 2 December 31, 2018 12 no December 31, 2018 2017.

Note 3 - Balance Sheet Detail

Note 3 - Balance Sheet Detail	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Supplemental Balance Sheet Disclosures [Text Block]	NOTE 3 —BALANCE SHEET DETAIL Inventories Inventories consist of the following (in thousands): December 31, 201 8 201 7 Raw materials $ 16,991 $ 19,160 Work in process 2,306 2,744 Finished goods 8,717 6,878 Total $ 28,014 $ 28,782 Property and Equipment, net Property and equipment, net, consists of the following (in thousands): December 31, 201 8 201 7 Leasehold improvements $ 660 $ 640 Office equipment and furniture 2,835 2,370 Machinery and equipment 7,304 6,277 10,799 9,287 Less: Accumulated depreciation (8,127) (7,191) Property and equipment, net $ 2,672 $ 2,096 Included in machinery and equipment are financed vehicles used by the Company’s North American sales employees. As of December 31, 2018 2017, $1.9 $1.6 $1.1 $0.7 $0.4 Goodwill and Other Intangible Assets Goodwill and other intangible assets comprise a patent sublicense acquired from Palomar in 2006, 2013. December 31, 2018 2017 Gross Carrying Amount Accumulated Amortization & Impairment Amount Net Amount December 31, 201 8 Patent sublicense $ 1,218 $ 1,218 $ — Customer relationship intangible related to acquisition 2,510 2,510 — Other identified intangible assets related to acquisition 780 780 — Other intangible 155 155 — Goodwill 1,339 — 1,339 Total $ 6,002 $ 4,663 $ 1,339 December 31, 201 7 Patent sublicense $ 1,218 $ 1,218 $ — Customer relationship intangible related to acquisition 2,510 2,510 — Other identified intangible assets related to acquisition 780 780 — Other intangible 155 155 — Goodwill 1,339 — 1,339 Total $ 6,002 $ 4,663 $ 1,339 The Company did not 2018. 2017 2016 $2,000 $141,000, no December 31, 2018. Accrued Liabilities Accrued liabilities consist of the following (in thousands): December 31, 201 8 201 7 Accrued payroll and related expenses $ 9,377 $ 12,567 Sales and marketing accruals 2,379 3,710 Accrued sales tax 2,935 2,920 Warranty liability 4,666 3,508 Other accrued liabilities 3,943 4,143 Total $ 23,300 $ 26,848 Product Remediation Liability During the fourth 2018, one one $5.0 $1.1 fourth $0.8 $5.0 $3.2

Note 4 - Warranty and Extended

Note 4 - Warranty and Extended Services Contracts	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Product Warranty Disclosure [Text Block]	NOTE 4 — W ARRANTY AND EXTENDED SERVICES CONTRACT The Company has a direct field service organization in North America (including Canada). Internationally, the Company provides direct service support in Australia, Belgium, France, Germany, Hong Kong, Japan, and Switzerland, as well as through third not third After the original warranty period, maintenance and support are offered on an extended service contract basis or on a time and materials basis. The Company provides for the estimated cost to repair or replace products under standard warranty at the time of sale. Costs incurred in connection with extended service contracts are recognized at the time when costs are incurred, except the one $3.2 one December 31, 2018 2017 December 31, 201 8 201 7 Balance at beginning of year $ 3,508 $ 2,461 Add: Accruals for warranties issued during the period 9,205 7,583 Less: Warranty related expenses during the period (8,045 ) (6,536 ) Balance at end of year $ 4,668 $ 3,508

Note 5 - Deferred Revenue

Note 5 - Deferred Revenue	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Revenue from Contract with Customer [Text Block]	NOTE 5 — DEFERRED REVENUE The Company records deferred revenue when revenue is to be recognized subsequent to invoicing. For extended service contracts, the Company generally invoices customers at the beginning of the extended service contract term. The Company’s extended service contracts typically have one, two three 79% $12.6 December 31, 2018 12 The following table provides changes in the deferred contract revenue balance for the years ended December 31, 2018 2017 December 31, 201 8 201 7 Balance at beginning of year $ 10,719 $ 9,431 Add: Payments received 14,882 14,369 Less: Revenue recognized (13,746 ) (13,081 ) Balance at end of year $ 11,855 $ 10,719 Costs for extended service contracts in 2018, 2017 2016 $7.8 $6.0 $6.7 $7.8 2018 one $3.2 one 3

Note 6 - Stockholders' Equity,

Note 6 - Stockholders' Equity, Stock Plans and Stock-based Compensation Expense	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]	NOTE 6 —STOCKHOLDERS’ EQUITY, STOCK PLANS AND STOCK-BASED COMPENSATION EXPENSE As of December 31, 2018, 2004 1998 In 1998, 1998 1998 4,650,000 On January 12, 2004, 2004 1,750,000 2004 2004 1998 1998 2012 2004 2.12 Options granted under the 1998 2004 may may 2004 may four 25% first 1/48th 2013 2012 three one third one 1/36th 2014 not 2013 2012 seven In accordance with the 2004 2012, $60,000 50 October 31, 2017, $60,000 one December 31, 2018, 2017 2016, 13,392, 21,605 45,350 2016 6,500 one four In the years ended December 31, 2018, 2017 2016 120,273, 270,707 229,865 one fourth one one fourth three one third one one third two December 15, 2017, 100,000 15%, 15%, 25% 45% third fourth In the years ended December 31, 2018, 2017 2016 49,498, 117,418 204,976 2018, 2017 2016 50% not 2018. 2004 On January 12, 2004, 2004 2004 2004 2004 six 2004 first i. 600,000 ii. 2.0% iii. an amount as determined by the Board of Directors. The Company’s Board of Directors did not January 1, 2019, 2018 2017. 85% six December 31, 2018, 2017and 2016, 2004 64,511, 78,479 79,922 December 31, 2018, 627,073 Option Activity Activity under the 1998 2004 Options Outstanding Shares Available For Grant Number of Shares Weighted- Average Exercise Price Weighted-Average Remaining Contractual Life (in years) Aggregate Intrinsic Value (in $ millions (1) Balances as of December 31, 2015 1,263,425 2,148,797 $ 9.31 3.4 $ 7.9 Options granted (162,000 ) 162,000 $ 11.55 Options exercised — (1,051,138 ) $ 8.89 Options cancelled (expired or forfeited) 143,187 (143,187 ) $ 12.93 Stock awards granted (1,018,005 ) — — Stock awards cancelled (expired or forfeited) 495,050 — — Balances as of December 31, 2016 721,657 1,116,472 $ 9.56 3.7 $ 8.7 Options granted (278,250 ) 278,250 $ 31.00 Options exercised — (488,398 ) $ 8.96 Options cancelled (expired or forfeited) 66,405 (66,405 ) $ 16.54 Stock awards granted (873,881 ) — — Stock awards cancelled (expired or forfeited) 258,935 — — Additional shares reserved (2) 1,600,000 — — Balances as of December 31, 2017 1,494,866 839,919 $ 16.46 3.99 $ 24.4 Options granted (21,010 ) 21,010 $ 50.65 Options exercised — (271,902 ) $ 9.99 Options cancelled (expired or forfeited) 81,322 (81,322 ) $ 21,55 Stock awards granted (562,070 ) Stock awards cancelled (expired or forfeited) 148,197 Balances as of December 31, 2018 1,141,305 507,705 $ 20.52 3.52 $ 2.00 Exercisable as of December 31, 2018 335,348 $ 14.68 2.73 $ 1.87 Vested and expected to vest, net of estimated forfeitures, as of December 31, 2018 485,469 $ 19.88 3.42 $ 19.86 ( 1 Based on the closing stock price of $17.02 December 31, 201 8 , $ 45.35 on December 30, 201 7 , $ 17.35 on December 31 201 6 and $ 12.79 on December 31, 201 5 . ( 2 Approved by the board of directors and stockholders in 2017. . The aggregate intrinsic value in the table above represents the total pre-tax intrinsic value (the aggregate difference between the Company’s closing stock price on the last trading day of the fiscal year and the exercise price, multiplied by the number of in-the-money options) that would have been received by the option holders had all option holders exercised their options on December 31, 2018. 2018, 2017 2016 $8.3 $8.0 $3.6 December 31, 2018 Exercise Prices Number Outstanding Contractual Life Number Outstanding $6.88 – $7.44 28,832 0.58 28,832 $8.80 97,268 1.44 97,268 $9.65 – $10.79 54,564 3.01 49,544 $10.80 – $11.24 57,521 3.18 47,293 $11.67 – $17.90 72,583 2.44 48,855 $18.55 – $25.70 71,250 5.21 28,512 $39.30 72,000 5.83 23,230 $43.40 6,510 6.45 — $47.40 38,927 5.86 10,564 $53.90 8,250 5.30 1,250 Stock Awards (RSU and PSU) Activity Table Information with respect to RSUs and PSUs activity is as follows (in thousands): Number of Weighted-Average Grant- Date Fair Aggregate Fair Value (1) Aggregate Intrinsic Value (2) Shares Value (in thousands) (in thousands) Outstanding at December 31, 2015 371,630 $ 12.39 $ 4,753 Granted 480,191 $ 10.80 Vested (3) (172,990 ) $ 12.56 $ 1,906 (5) Forfeited (233,514 ) $ 11.36 Outstanding at December 31, 2016 445,317 $ 11.15 $ 7,726 Granted 412,208 $ 28.74 Vested (3) (224,799 ) $ 10.91 $ 5,168 (6) Forfeited (122,139 ) $ 13.56 Outstanding at December 31, 2017 510,587 $ 24.88 $ 23,155 Granted 265,124 $ 44.57 Vested (3) (231,515 ) $ 21.10 $ 9,483 (6) Forfeited (69,905 ) $ 20.01 Outstanding at December 31, 2018 474,291 $ 38.44 $ 8,072 ( 1 Represents the value of the Company’s stock on the date that the restricted stock units and performance stock units vest. ( 2 Based on the closing stock price of the C o m pan y ’ s stock of $ 17.02 on December 31, 2018 , $ 45.35 on December 31, 2017 , $ 17.35 December 31 , 2016 and $12.79 on December 30 , 2015 . ( 3 The number of restricted stock units vested includes shares tha t the Company withheld on behalf of the employees to satisfy the statutory tax withholding requirements. ( 4 On the grant date, the fair value for these vested awards was $ 2.2 million. ( 5 On the grant date, the fair value for these vested awards was $2.5 million. ( 6 On the grant date, the fair value for these vested awards was $4.9 million. Stock-Based Compensation Stock-based compensation expense for the years ended December 31, 2018, 2017 2016 Year Ended December 31, 201 8 201 7 201 6 Stock options $ 838 $ 815 $ 989 RSUs 4,648 1,813 1,508 PSUs 1,105 2,093 967 ESPP 566 389 249 Total stock-based compensation expense $ 7,157 $ 5,110 $ 3,713 As of December 31, 2018, $12.8 2.63 $272,000, 0.33 The Company issues new shares of common stock upon the exercise of stock options, vesting of RSUs and PSUs, and the issuance of ESPP shares. The amount of cash received from these issuances (excluding PSUs), net of taxes withheld and paid, in 2018, 2017and 2016 $1.3 $4.0 $9.5 Total stock-based compensation expense recognized during the year ended December 31, 2018, 2017 2016 Year Ended December 31, 201 8 201 7 201 6 Cost of revenue $ 743 $ 660 $ 341 Sales and marketing 2,105 1,642 1,179 Research and development 824 936 596 General and administrative 3,485 1,872 1,597 Total stock-based compensation expense $ 7,157 $ 5,110 $ 3,713 Valuation Assumptions and Fair Value of Stock Options and ESPP Grants The Company uses the Black-Scholes option pricing model to estimate the fair value of options granted under its equity incentive plans and rights to acquire stock granted under its employee stock purchase plan. The Company based the weighted average estimated values of employee stock option grants and rights granted under the employee stock purchase plan, as well as the weighted average assumptions used in calculating these values, on estimates at the date of grant, as follows: Stock Options Stock Purchase Plan 201 8 201 7 201 6 201 8 201 7 201 6 Expected term (in years) (1) 3.7 3.70 3.83 0.50 0.50 0.50 Risk-free interest rate (2) 2.6 % 1.73 % 1.09 % 2.34 % 1.14 % 0.46 % Volatility (3) 44 % 40 % 40 % 61 % 42 % 39 % Dividend yield (4) — % — % — % — % — % — % Weighted average estimated fair value at grant date $ 18.0 $ 9.98 $ 3.72 $ 9.6 $ 8.21 $ 3.22 ( 1 The expected term represents the period during which the Company’s stock-based awards are expected to be outstanding. The estimated term is based on historical experience of similar awards, giving consideration to the contractual terms of the awards, vesting requirements, and expectation of future employee behavior, including post-vesting terminations. ( 2 The risk-free interest rate is based on U.S. Treasury debt securities with maturities close to the expected term of the option as of the date of grant. ( 3 Estimated volatility is based on historical volatility. The Company also considers implied volatility when there is sufficient volume of freely traded options with comparable terms and exercise prices in the open market. The Company periodically estimates forfeiture rates based on its historical experience within separate groups of employees and adjusts the stock-based payment expense accordingly. The forfeiture rates used in 2018 0% 17%. Non-Em ployee Stock-Based Compensation Stock-based compensation expense related to stock options granted to non-employees is recognized based on the fair value of the stock options, determined using the Black-Scholes option pricing model, as they are earned. The awards generally vest over the time period the Company expects to receive services from the nonemployee. The Company revalues stock options granted to non-employees at each reporting date as the underlying equity instruments vest. The Company granted 3,384 one December 31, 2018, 7,745 2,478 2017, zero 2016. 7,745 2017 4 25% first 1/48th The 3,384 2018 4 25% Stock Awards Withholdings For Stock Awards granted to employees, the number of shares issued on the date the Stock Awards vest is net of the tax withholding requirements paid on behalf of the employees. In 2018, 2017 2016, 77,049, 64,490, 56,157shares $3,130,360, $1, 1,471,000 $619,000, not

Note 7 - Income Taxes

Note 7 - Income Taxes	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Income Tax Disclosure [Text Block]	NOTE 7 —INCOME TAXES The Company files income tax returns in the U.S. federal and various state and local jurisdictions and foreign jurisdictions. The Company’s income (loss) before provision for income taxes consisted of the following (in thousands): Year Ended December 31, 201 8 201 7 201 6 U.S. $ (14,177 ) $ 11,203 $ 2,207 Foreign 662 757 513 Income (loss) before income taxes $ (13,515 ) $ 11,960 $ 2,720 The components of the provision (benefit) for income taxes are as follows (in thousands): Year Ended December 31, 201 8 201 7 201 6 Current: Federal $ (15) $ 148 $ — State 123 71 16 Foreign 303 511 131 Total Current 411 730 147 Deferred: Federal 15,674 (17,393) (24) State 1,230 (1,348) (2) Foreign (60) (22) 22 Total Deferred 16,844 (18,763) (4) Tax provision $ 17,255 $ (18,033) $ 143 The Company’s deferred tax asset consists of the following (in thousands): December 31, 201 8 201 7 Net operating loss carryforwards $ 11,227 $ 8,604 Stock-based compensation 1,040 1,179 Other accruals and reserves 1,924 1,663 Credits 10,857 11,781 Foreign 457 399 Accrued warranty 1,863 847 Depreciation and amortization 2,024 1,592 Other 282 303 Deferred tax asset before valuation allowance 29,674 26,368 Valuation allowance (27,865) (7,242) Deferred tax asset after valuation allowance 1,809 19,126 Deferred tax liability (1,269) — Deferred tax liability on goodwill (83) (71) Net deferred tax asset $ 457 $ 19,055 The differences between the U.S. federal statutory income tax rates to the Company’s effective tax rate are as follows: Year Ended December 31, 201 8 2017* 2016* U.S. federal statutory income tax rate 21.00 % 34.00 % 34.00 % State tax rate (4.95) (5.59) (14.56) Meals and entertainment (2.66) 2.15 7.56 Stock-based compensation 13.66 (21.55) 14.36 SAB 118 Change in Estimate (2.43) — Foreign rate differential 0.11 (0.50) (0.16) Other (1.21) 0.65 (2.15) General business credit 4.31 (2.72) (9.25) Change in Federal Tax Rate — 60.98 — Valuation allowance (155.49) (218.17) (24.57) Effective tax rate (127.66) % (150.75) % 5.23 % * Other balance in 2017 and 2016 was reclassified for consistency with current year. The Company assesses the ability to realize its net deferred tax assets by evaluating all available evidence, both positive and negative, including ( 1 2 3 4 The Company’s deferred tax assets are primarily comprised of U.S. Net Operating Loss (“NOL”), tax credit and other deferred tax assets relating to book-to-tax temporary differences. The Company had recorded and maintained a full valuation allowance against those net deferred tax assets to reduce them to their estimated net realizable value through September 30, 2017. December 31, 2017, not $26.3 As of each reporting date, the Company’s management considers new evidence, both positive and negative, that could impact management’s view with regard to future realization of deferred tax assets. As of December 31, 2018, three December 31, 2018, not not $16.9 At December 31, 2018, $45.7 $20.5 not 2029 2038. $11.8 December 31, 2017 no December 31, 2018, $6.7 $7.4 $0.3 2024, no 2021. The utilization of NOL carryforwards and tax credits may 382 may 382 December 31, 2018 no not 382 Undistributed earnings of the Company’s foreign subsidiaries at December 31, 2018 no 2017 not not In December 2017, No. 118, 118” not one 2017 fourth 2017, December 31, 2017. 2017 fourth 2018. 2017 December 31, 2018. $0.3 $7.3 $0.3 118. In January 2018, 2017 Uncertain Tax Positions The Company establishes reserves for uncertain tax positions based on the largest amount that is more-likely-than- not not 50% two first not second 50% Although the Company believes it has adequately reserved for its uncertain tax positions, no not The Company files U.S., state, and foreign income tax returns in jurisdictions with varying statutes of limitations. The 2005 2018 2011 2017 The following table summarizes the activity related to the Company’s gross unrecognized tax benefits in December 31, 2016 December 31, 2018 ( Year Ended December 31, 201 8 201 7 201 6 Balance at beginning of year $ 1,519 $ 707 $ 651 Decreases related to prior year tax positions (70) 643 — Increases related to current year tax positions 114 169 56 Balance at end of year $ 1,563 $ 1,519 $ 707 It is the Company’s policy to recognize interest and penalties related to income tax matters in income tax expense. As of December 31, 2018, $107,000

Note 8 - Net Loss Per Share

Note 8 - Net Loss Per Share	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Earnings Per Share [Text Block]	NOTE 8 —NET LOSS PER SHARE Basic net income (loss) per share is computed using the weighted-average number of shares outstanding during the period. In periods of net income, diluted shares outstanding include the dilutive effect of in-the-money equity awards (stock options, restricted stock units, performance stock units and employee stock purchase plan contributions), which is calculated based on the average share price for each fiscal period using the treasury stock method. In accordance with ASC 260, Diluted earnings per share is the same as basic earnings per share for the periods in which the Company had a net loss because the inclusion of outstanding common stock equivalents would be anti-dilutive. The following table sets forth the computation of basic and diluted net income (loss) and the weighted average number of shares used in computing basic and diluted net income (loss) per share (in thousands, except per share data): Year Ended December 31, 201 8 201 7 201 6 Numerator: Net Income(loss) $ (30,770) $ 29,993 $ 2,577 Denominator: Weighted average shares of common stock outstanding used in computing net income (loss) per share, basic 13,771 13,873 13,225 Dilutive effect of incremental shares and share equivalents — 855 528 Weighted average shares of common stock outstanding used in computing net income (loss) per share, diluted 13,771 14,728 13,753 Net income(loss) per share: Net income (loss) per share, basic $ (2.23) $ 2.16 $ 0.19 Net income (loss) per share, diluted $ (2.23) $ 2.04 $ 0.19 The following numbers of shares outstanding, prior to the application of the treasury stock method, were excluded from the computation of diluted net income (loss) per common share for the period presented because including them would have had an anti-dilutive effect (in thousands): Year Ended December 31, 201 8 201 7 201 6 Options to purchase common stock 664 42 220 Restricted stock units 432 9 24 Employee stock purchase plan shares 133 — — Performance stock units 43 — — Total 1,272 51 244

Note 9 - Defined Contribution P

Note 9 - Defined Contribution Plan	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Pension and Other Postretirement Benefits Disclosure [Text Block]	NOTE 9 —DEFINED CONTRIBUTION PLAN In the U.S., the Company has an employee savings plan ( “401 401 may 401 100% 2018, 2017 2016, 401 $0.4 $0.3 $0.2 For the Company’s Japanese subsidiary, a discretionary employee retirement plan has been established. In addition, for some of the Company’s other foreign subsidiaries, the Company deposits funds with insurance companies, third December 31, 2018, three not

Note 10 - Segment Information a

Note 10 - Segment Information and Revenue by Geography and Products	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	NOTE 10 —SEGMENT INFORMATION AND REVENUE BY GEOGRAPH Y AND PRODUCTS Segment reporting is based on the “management approach,” following the method that management organizes the Company’s reportable segments for which separate financial information is made available to, and evaluated regularly by, the chief operating decision maker in allocating resources and in assessing performance. The Company’s chief operating decision maker is its Chief Executive Officer ("CEO"), who makes decision on allocating resources and in assessing performance. The CEO reviews the Company's consolidated results as one one one The following table presents a summary of revenue by geography for the year ended December 31, 2018 2017 Year Ended December 31, 201 8 201 7 201 6 Revenue mix by geography: United States $ 101,862 $ 94,581 $ 65,513 Japan 17,819 17,264 14,727 Asia, excluding Japan 15,467 13,719 13,445 Europe 8,875 8,317 7,539 Rest of the world 18,696 17,612 16,832 Total Consolidated revenue $ 162,720 $ 151,493 $ 118,056 Revenue mix by product category: Systems $ 132,594 $ 125,883 $ 92,721 Consumables 4,162 2,435 2,498 Skincare 5,778 4,342 3,809 Total product revenue 142,535 132,660 99,028 Service 20,185 18,833 19,028 Total Consolidated revenue $ 162,720 $ 151,493 $ 118,056

Note 11 - Commitments and Conti

Note 11 - Commitments and Contingencies	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	NOTE 11 —COMMITMENTS AND CONTINGENCIES OPERATING LEASES Facility Leases As of December 31, 2018, Year Ending December 31, Amount 2019 $ 3,011 2020 2,939 2021 2,564 2022 2,495 2023 and thereafter 214 Future minimum rental payments $ 11,223 Gross rent expense recognized in the years ended December 31, 2018, 2017 2016 $2.9 $1.5 $1.6 Vehicle Leases As of December 31, 2018, Year Ending December 31, Amount 2019 $ 576 2020 287 2021 152 Future minimum lease payments $ 1,015 Purchase Commitments The Company maintains certain open inventory purchase commitments with its suppliers to ensure a smooth and continuous supply for key components. The Company’s liability in these purchase commitments is generally restricted to a forecasted time-horizon as agreed between the parties. These forecasted time-horizons can vary among different suppliers. Although open purchase orders are considered enforceable and legally binding, the terms generally allow the Company the option to cancel, reschedule, and adjust their requirements based on the Company's business needs prior to the delivery of goods or performance of services The Company’s open inventory purchase commitments with its suppliers as of December 31, 2018 $1.7 $7.2 2019 2020. Indemnifications In the normal course of business, the Company enters into agreements that contain a variety of representations, warranties, and indemnification obligations. For example, the Company has entered into indemnification agreements with each of its directors and executive officers and certain key employees. The Company’s exposure under its various indemnification obligations is unknown and not may not Contingencies The Company is named from time to time as a party to other legal proceedings, product liability, commercial disputes, employee disputes, and contractual lawsuits in the ordinary course of business. These matters are subject to many uncertainties and outcomes that are not may not no not As of December 31, 2018 December 31, 2017, $171,000 $91,000, not

Note 12 - Debt

Note 12 - Debt	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Debt Disclosure [Text Block]	NOTE 1 2 — DEBT Loan and Security Agreement On May 30, 2018, $25 May 30, 2021. December 31, 2018, no Covenants The Original Revolving Line of Credit contained financial and other covenants as well as the maintenance of a leverage ratio not 2.5 1.0 not $10 During the third 2018, third November 2, 2018, The First Amended Revolving Line of Credit provided for an original principal amount of $15 $10 Similar to the Original Revolving Line of Credit, the First Amended Revolving Line of Credit contained revised financial and other covenants as well as the maintenance of a leverage ratio not 2.0 1.0 not $1 2018 third $2.5 2018 fourth $4 2019 first second $6.5 2019 third $10 Subsequent to December 2018, March 11, 2019 $15 no may not $10 not 2.5 1.0. As of the date of this filing, there were no

Note 13 - Related Parties

Note 13 - Related Parties	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Related Party Transactions Disclosure [Text Block]	NOTE 13 —RELATED PARTIES In 2018 2017, $63,000 $196,000, December 31, 2016, 6,500 $87,100, three 33.33% three October 28, 2016, December 31, 2018 $200 40 The Company signed an agreement with a real estate firm, T3 September 2017, T3 2018 2017, $192,000 $38,000 T3

Note 14 - Correction of Prior P

Note 14 - Correction of Prior Period Immaterial Error	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Accounting Changes and Error Corrections [Text Block]	NOTE 14—CORRECTION During the three June 30, 2018, not 606 March 31, 2018. 606, $5.0 January 1, 2018. 606 $1.2 The Company evaluated the impact of the error on prior periods and determined that the effect was not three March 31, 2018 six June 30, 2018. six June 30, 2018. $1.2 $1.2 1 January 1, 2018. The Company’s condensed consolidated statements of operations, comprehensive income (loss) and cash flows for the three March 31, 2018, six nine September 30, 2018, December 31, 2018 not three March 31, 2018, six nine September 30, 2018, December 31, 2018

Note 15 - Subsequent Events

Note 15 - Subsequent Events	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Subsequent Events [Text Block]	NOTE 1 5 —SUBSEQUENT EVENT S The Company evaluates events or transactions that occur after the balance sheet date through to the date which the financial statements are issued, for potential recognition or disclosure in its consolidated financial statements in accordance with Subsequent Events. Effective January 4, 2019, In connection with Mr. Reinstein's resignation, the Company entered into a Separation Agreement and release with him. Pursuant to the Separation Agreement, Mr. Reinstein will serve as a consultant to the Company for six 10.2 8 January 9, 2019, $0.6 twelve 12 100% 2018 thirty 30 4,667 April 4, 2019.

Supplementary Financial Data (U

Supplementary Financial Data (Unaudited)	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
Quarterly Financial Information [Text Block]	SUPPLEMENTARY FINANCIAL DATA (UNAUDITED) (In thousands, except per share amounts) Quarter ended: Dec. 31, 201 8 Sept. 30, 201 8 June 30, 201 8 March 31, 201 8 Dec. 31, 201 7 Sept. 30, 201 7 June 30, 201 7 March 31, 201 7 Net revenue $ 45,469 $ 40,573 $ 42,553 $ 34,125 $ 47,632 $ 38,173 $ 36,389 $ 29,299 Cost of revenue 26,683 18,688 20,176 16,791 20,299 15,963 15,343 13,778 Gross profit 18,786 21,885 22,377 17,334 27,333 22,210 21,046 15,521 Operating expenses: Sales and marketing 15,318 14,479 15,535 13,088 15,362 13,148 12,787 10,773 Research and development 3,464 3,244 4,095 3,556 3,481 3,467 2,981 2,945 General and administrative 5,494 5,160 4,902 5,439 3,947 3,379 3,548 3,216 Lease termination income — — — — — (4,000 ) — — Total operating expenses 24,276 22,883 24,532 22,083 22,790 15,994 19,316 16,934 Income (loss) from operations (5,490 ) (998 ) (2,155 ) (4,749 ) 4,543 6,216 1,730 (1,413 ) Interest and other income, net (44 ) (49 ) (129 ) 98 138 197 276 273 Income (loss) before income taxes (5,534 ) (1,047 ) (2,284 ) (4,651 ) 4,681 6,413 2,006 (1,140 ) Income tax provision 20,760 (174 ) (712 ) (2,619 ) (18,199 ) 225 59 (118 ) Net income (loss) $ (26,293 ) $ (873 ) $ (1,572 ) $ (2,032 ) $ 22,880 $ 6,188 $ 1,947 $ (1,022 ) Net income (loss) per share—basic $ (1.89 ) $ (0.06 ) $ (0.11 ) $ (0.15 ) $ 1.66 $ 0.44 $ 0.14 $ (0.07 ) Net income (loss) per share—diluted $ (1.89 ) $ (0.06 ) $ (0.11 ) $ (0.15 ) $ 1.57 $ 0.42 $ 0.13 $ (0.07 ) Weighted average number of shares used in per share calculations: Basic 13,932 13,851 13,709 13,587 13,744 13,973 13,935 13,840 Diluted 13,932 13,851 13,709 13,587 14,569 14,767 14,629 13,840

Schedule II - Valuation and Qua

Schedule II - Valuation and Qualifying Accounts	12 Months Ended
	Dec. 31, 2018
Notes to Financial Statements
SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]	CUTERA, INC. VALUATION AND QUALIFYING ACCOUNTS (in thousands) For the Year s Ended December 31, 201 8 , 20 1 7 and 20 1 6 Balance at Beginning of Year Additions Deductions Balance at End of Year Deferred tax assets valuation allowance Year ended December 31, 2018 $ 7,242 $ 22,770 $ 2,147 $ 27,865 Year ended December 31, 2017 $ 31,751 $ 617 $ 25,126 $ 7,242 Year ended December 31, 2016 $ 27,616 $ 6,755 $ 2,620 $ 31,751 Balance at Beginning of Year Additions Deductions Balance at End of Year Allowance for doubtful accounts receivable Year ended December 31, 2018 $ 9 $ 1,880 $ 632 $ 1,257 Year ended December 31, 2017 $ 21 $ 14 $ 26 $ 9 Year ended December 31, 2016 $ 4 $ 21 $ 4 $ 21

Significant Accounting Policies

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Consolidation, Subsidiaries or Other Investments, Consolidated Entities, Policy [Policy Text Block]	Description of Operations and Principles of Consolidation Cutera, Inc. (“Cutera” or the “Company”) is a global provider of laser and energy-based aesthetic systems for practitioners worldwide. The Company designs, develops, manufactures, distributes and markets light and energy-based product platforms for use by physicians and other qualified practitioners, enabling them to offer safe and effective aesthetic treatments to their customers. The Company currently markets the following system platforms: excel, enlighten, Juliet, Secret RF, truSculpt xeo Titan, truSculpt 3D truSculpt iD Juliet Secret RF third Titan , truSculpt 3D truSculpt iD Headquartered in Brisbane, California, the Company has wholly-owned subsidiaries that are currently operational in Australia, Belgium, Canada, France, Germany, Hong Kong, Japan, Spain, Switzerland and the United Kingdom. The Company’s wholly owned subsidiary in Italy is currently dormant. These active subsidiaries market, sell and service the Company’s products outside of the United States. The Consolidated Financial Statements include the accounts of the Company and its subsidiaries. All inter-company transactions and balances have been eliminated.
Use of Estimates, Policy [Policy Text Block]	Use of Estimates The preparation of Consolidated Financial Statements in conformity with Generally Accepted Accounting Principles (“GAAP”) requires the Company’s management to make estimates and assumptions that affect the amounts reported of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial Statements and the accompanying notes, and the reported amounts of revenue and expenses during the reported periods. Actual results could differ materially from those estimates. On an ongoing basis, management evaluates its estimates, including those related to warranty obligations, sales commission, accounts receivable and sales allowances, valuation of inventories, fair values of goodwill, useful lives of property and equipment, assumptions regarding variables used in calculating the fair value of the Company's equity awards, expected achievement of performance based vesting criteria, fair value of investments, the standalone selling price of the Company's products and services, the customer life and period of benefit used to capitalize and amortize contracts acquisition costs, variable consideration, contingent liabilities, recoverability of deferred tax assets, and effective income tax rates, among others. Management bases estimates on historical experience and on various other assumptions that are believed to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities.
Risks and Uncertainties, Policy [Policy Text Block]	R isks and Uncertainties The Company's future results of operations involve a number of risks and uncertainties. Factors that could affect the Company's future operating results and cause actual results to vary materially from expectations include, but are not
Comparability of Prior Year Financial Data, Policy [Policy Text Block]	Comparability The Company adopted the new revenue standard effective January 1, 2018, not December 31, 2018 December 31, 2018 December 31, 2017. December 31, 2018 December 31, 2017 not December 31, 2018 December 31, 2017.
New Accounting Pronouncements, Policy [Policy Text Block]	Recent Accounting Pronouncements Not In February 2016, 2016 02, 842 July 2018, 2018 11, 2016 02 2018 2018 11 not July 2018, 2018 10, 842, 2016 02. 2016 02 January 1, 2019 The Company will adopt ASC Topic 842 January 1, 2019, not not The Company expects that this standard will have a material effect on our financial statements. While the Company continues to assess all of the effects of adoption, the Company currently believes the most significant effects relate to the recognition of new right-of-use (“ROU”) assets and lease liabilities on our balance sheet for our auto, office, and embedded leases; and the requirement to provide significant new disclosures about our leasing activities. Upon the adoption of ASC Topic 842, $10.0 $11.0 The new standard also provides practical expedients for an entity’s ongoing accounting. The Company will elect the short-term lease recognition exemption for all leases that qualify. This means, for those leases that qualify, the Company will not not not not Recently Adopted Accounting Pronouncements In May 2014, 2014 09, 606, December 15, 2017, December 15, 2016. first 2018 not See “Revenue Recognition,” for additional accounting policy and transition disclosures. On January 26, 2017, No. 2017 04, 350 one not 2 two 350 20 35 3A The amendment is effective for the Company for its fiscal years beginning after December 15, 2019. January 1, 2017 ( 350 20 65 3 2017 04—Intangibles—Goodwill 350 October 1, 2018. no See ” Goodwill and Other Intangible Assets” in Note 3 In June 2018, No. 2018 07, 718 1 2 3 606. December 15, 2018, no 606. January 1, 2019 not
Revenue from Contract with Customer [Policy Text Block]	Revenue The Company adopted ASC Topic 606, January 1, 2018, not January 1, 2018. January 1, 2018 606, not 606. Upon adoption of ASC Topic 606, $3.8 7 January 1, 2018 first 2018: ● $237,000 ● $151,000 one ● $210,000 ● $4.7 2.5 ● $1.2 606 The following table summarizes the effects of adopting ASC Topic 606 December 31, 2018: As reported under ASC Topic 606 Adjustments Balances under Prior GAAP (In thousands) Other long-term assets $ 5,971 $ 5,217 $ 754 Deferred revenue 12,566 (106) 12,460 Retained earnings (deficit) (24,010) 4,176 (19,834) The following table summarizes the effects of adopting ASC Topic 606 December 31, 2018: As reported under Topic 606 Adjustments Balances under Prior GAAP (In thousands) Products revenue $ 142,535 $ 274 $ 61 Service revenue 20,185 280 19,905 Sales and marketing 58,420 540 58,960 Interest and other income, net* (123) 297 174 * Included in interest and other income, net, is the estimated interest expense for advance payment related to service contracts under the new revenue standard. Adoption of the standard had no As part of the Company's adoption of ASC Topic 606, not one one not not Revenue recognition Revenue recognition- Period before January 1, 2018 - 606 The Company recognized revenue under ASC Topic 605 606 January 1 2018. 605, ● Persuasive evidence of an arrangement exists; ● The price is fixed or determinable; ● Delivery has occurred or services have been rendered; and ● Collectability is reasonably assured. Transfer of title and risk of ownership occurs when the product is shipped to the customer or when the customer receives the product, depending on the nature of the arrangement. Revenue is recorded net of customer and distributor discounts. When collectability is not not Multiple-element Arrangements A multiple-element arrangement includes the sale of one one For multiple-element arrangements, judgments are required as to the allocation of the proceeds received from an arrangement to the multiple elements of the arrangement. For multiple element arrangements the Company allocates revenue to all deliverables based on their relative selling prices in accordance with the FASB Accounting Standards Codification (“ASC”) 605 25. third not With respect to the sale of its earlier generation of the truSculpt truSculpt not truSculpt truSculpt Customer Marketing Arrangements The Company has a customer marketing and incentive program called “Cutera Bucks” for its North America customers through which it offers various sales incentives and discounts and pays or reimburses customers for qualifying expenses associated with practice set-up, advertising procedures related to the system purchased, and other expenses. The Company records such incentives as a reduction of revenue at the time when the sale of the system is recorded. Service Revenue The Company also offers customers extended service contracts. Revenue under service contracts is recognized on a straight-line basis over the period of the applicable service contract. Revenue from services performed in the absence of a service contract, including installation and training revenue, is recognized when the related services are performed and collectability is reasonably assured. Service revenue billed on a time and material basis, from customers whose systems are not December 31, 2017 2016 $18.8 $19.0 Bill and Hold Arrangement Under ASC 605 2017 one third no $938,000 2017. no 2016. Revenue recognition- Period after January 1, 2018 - 606 Revenue is recognized upon transfer of control of promised products or services to customers in an amount that reflects the consideration to which the Company expects to be entitled in exchange for promised goods or services. The Company’s performance obligations are satisfied either over time or at a point in time. Revenue from performance obligations that are transferred to customers over time accounted for approximately 12% twelve December 31, 2018. The Company has certain system sale arrangements that contain multiple products and services. For these bundled sale arrangements, the Company accounts for individual products and services as separate performance obligations if they are distinct. The Company’s products and services are distinct if a customer can benefit from the product or service on its own or with other resources that are readily available to the customer, and if the Company’s promise to transfer the products or service to the customer is separately identifiable from other promises in the contract. The Company’s system sale arrangements include a combination of the following performance obligations: the system and software license (considered as one For the Company’s system sale arrangements that include an extended service contract, the period of service commences at the expiration of the Company’s standard warranty offered at the time of the system sale. The Company considers the extended service contracts terms in the arrangements that are legally enforceable to be performance obligations. Other than extended service contracts and marketing services (which are satisfied over time), the Company generally satisfies all of the performance obligations at a point in time. Systems, system accessories (hand pieces), training, time and materials services are also sold on a stand-alone basis, and related performance obligations are satisfied at a point in time. For contracts with multiple performance obligations, the Company allocates the transaction price of the contract to each performance obligation on a relative standalone selling price basis. Nature of Products and Services Systems System revenue represents the sale of a system or an upgrade of an existing system. A system consists of a console that incorporates a universal graphic user interface, a laser or other energy based module, control system software and high voltage electronics, as well as one Pearl Pearl Fractional The Company offers customers the ability to select the system that best fits their practice at the time of purchase and then to cost-effectively add applications to their system as their practice grows. This provides customers the flexibility to upgrade their systems whenever they choose and provides the Company with a source of additional Systems revenue. The Company concludes that the system or upgrade and the right to use the embedded software represent a single performance obligation as the software license is integral to the functionality of the system or upgrade. The Company does not enlighten enlighten enlighten For systems sold directly to end-customers that are credit approved, revenue is recognized when the Company transfers control to the end-customer, which occurs when the product is shipped to the customer or when the customer receives the product, depending on the nature of the arrangement. The Company recognizes revenue on a cash basis for system sales to international direct end-customer sales that have not The Company typically receives payment for its system consoles and other accessories within 30 Skincare products The Company sells third third third Consumables (Other accessories) The Company treats its customers' purchases of replacement Titan truSculpt 3D truSculpt iD Juliet Secret RF truSculpt Extended contract services The Company offers post-warranty services to its customers through extended service contracts that cover parts and labor for a term of one, two, or three Training Sales of system to customers include training on the system to be provided within 180 not Customer Marketing Support In North America, the Company offers marketing and consulting phone support to its customers who purchase truSculpt 3D truSculpt iD six six Significant Judgments The Company combines two The Company is required to estimate the total consideration expected to be received from contracts with customers. In limited circumstances, the consideration expected to be received is variable based on the specific terms of the contract The Company has not The Company determines standalone selling price ("SSP") for each performance obligation as follows: Systems: The SSPs for systems are based on directly observable sales in similar circumstances to similar customers. When SSP is not Training: SSP is based on observable price when sold on a standalone basis. Extended warranty/Service contracts: SSP is based on observable price when sold on a standalone basis (by customer type). Customer Marketing Support: SSP is estimated based on cost plus a margin. Set-up /Installation: Set-up or installation for all other systems (excluding the enlighten system) is immaterial in the context of the contract as the set-up or installation for systems other than enlighten. The related costs to complete set-up or installation are immaterial. The calibration and installation service of the enlighten system are treated as separate performance obligations because the Company regularly sells enlighten systems without the calibration and installation service. Loyalty Program The Company launched a customer loyalty program during the third 2018 fifth 5 th The fair value of the reward earned by loyalty program members is included in accrued liabilities and recorded as a reduction of net sales at the time the reward is earned.
Cash and Cash Equivalents Marketable Investments and Long-term Investments [Policy Text Block]	Cash Equivalents, and Marketable Investments The Company invests its cash primarily in money market funds and in highly liquid debt instruments of U.S. federal and municipal governments and their agencies, commercial paper and corporate debt securities. All highly liquid investments with stated maturities of three three The Company determines the appropriate classification of its investments in marketable securities at the time of purchase and re-evaluates such designation at each balance sheet date. The Company’s marketable securities have been classified and accounted for as available-for-sale securities. Investments with remaining maturities of more than one
Fair Value Measurement, Policy [Policy Text Block]	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 at the measurement date. In determining fair value, the Company utilizes valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible as well as considers counterparty credit risk in its assessment of fair value. The Company’s financial instruments include cash equivalents, accounts receivable, accounts payable and accrued liabilities. Carrying amounts of the Company's financial instruments, approximate their fair values as of the balance sheet dates given their generally short maturities. The fair value hierarchy distinguishes between ( 1 2 three 1 3 three 820: ● Level 1: ● Level 2: not 2 not ● Level 3: no In determining fair value, the Company utilizes valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs to the extent possible. The Company also considers counterparty credit risk in its assessment of fair value.
Marketable Securities, Policy [Policy Text Block]	Impairment of Marketable Investments After determining the fair value of available-for-sales debt instruments, gains or losses on these securities are recorded to other comprehensive income, until either the security is sold or the Company determines that the decline in value is other-than-temporary. The primary differentiating factors that the Company considers in classifying impairments as either temporary or other-than-temporary impairments are the Company’s intent and ability to retain the investment in the issuer for a period of time sufficient to allow for any anticipated recovery in market value or the maturity of the investment, the length of the time and the extent to which the market value of the investment has been less than cost and the financial condition and near-term prospects of the issuer. There were no December 31, 2018, 2017, 2016.
Allowances for Sales Returns and Doubtful Accounts [Policy Text Block]	Allowance for Sales Returns and Doubtful Accounts The allowance for sales returns is based on the Company’s estimates of potential future product returns and other allowances related to current period product revenue. The Company analyzes historical returns, current economic trends and changes in customer demand and acceptance of the Company's products. In cases where the Company is aware of circumstances that may
Concentration Risk, Credit Risk, Policy [Policy Text Block]	Concentration of Credit Risk and Other Risks and Uncertainties The Company operates in markets that are highly competitive and rapidly changing. Significant technological changes, shifting customer needs, the emergence of competitive products or services with new capabilities and other factors could negatively impact our operating results. The Company is also subject to risks related to changes in the value of our significant balance of financial instruments. Financial instruments that potentially subject the Company to concentrations of risk consist principally of cash, cash equivalents, marketable investments and accounts receivable. The Company’s cash and cash equivalents are primarily invested in deposits and money market accounts with three may not The Company invests in debt instruments, including bonds of the U.S. Government, its agencies and municipalities. The Company has also invested in other high grade investments such as commercial paper and corporate debt securities. The Company has established guidelines relative to credit ratings, diversification and maturities that seek to maintain safety and liquidity. By policy, the Company restricts its exposure to any single issuer by imposing concentration limits. To minimize the exposure due to adverse shifts in interest rates, the Company maintains investments at an average maturity of generally less than twelve Accounts receivable are recorded net of an allowance for doubtful accounts, and are typically unsecured and are derived from revenue earned from worldwide customers. The Company controls credit risk through credit approvals, credit limits, and monitoring procedures. The Company performs credit evaluations of its customers and maintains reserves for potential credit losses. As of December 31, 2018 2017, one 4.9% December 31, 2018, 2017, 2016, 62%, 65%, 55%, 37%, 38%, 45%, No 10% December 31, 2018, 2017, 2016. Supplier concentration The Company relies on third third may
Inventory, Policy [Policy Text Block]	Inventories Inventories are stated at the lower of cost and net realizable value, cost being determined on a standard cost basis which approximates actual cost on a first first The Company includes demonstration units within inventories. Demonstration units are carried at cost and amortized over an estimated economic life of two As of December 31, 2018 2017, $2.9 $1.9
Property, Plant and Equipment, Policy [Policy Text Block]	Property and Equipment Property and equipment are stated at cost, net of accumulated depreciation. Depreciation expense recognized is on a straight-line basis over the estimated useful lives of the assets, generally as follows: Useful Lives Leasehold improvements Lesser of useful life or term of lease Office equipment and furniture (in years) 3 Machinery and equipment (in years) 3 Upon sale or retirement of property and equipment, the costs and related accumulated depreciation and amortization are removed from the balance sheet and the resulting gain or loss is reflected in operating expenses. Maintenance and repairs are charged to operations as incurred. Depreciation expense related to property and equipment for 2018, 2017 2016, $1.2 $1.0 $0.8
Goodwill and Intangible Assets, Intangible Assets, Policy [Policy Text Block]	Goodwill and Intangible Assets Goodwill and intangible assets with indefinite useful lives are not fourth may no The Company continues to operate in one December 31, 2018, no December 31, 2018.
Standard Product Warranty, Policy [Policy Text Block]	Warranty Obligations The Company offers post-warranty services to its customers through extended service contracts that cover replacement parts and labor for a term of one, two, or three 14 16 The Company also offers services on a time-and-materials basis for detachable hand piece replacements, parts and labor. These post-warranty services serve as additional sources of recurring revenue from the Company’s installed product base.
Deferred Charges, Policy [Policy Text Block]	Deferred Sales Commissions Incremental costs of obtaining a contract, including sales commissions, are capitalized and amortized on a straight-line basis over the expected customer relationship period. The Company uses the portfolio method to recognize the amortization expense related to these capitalized costs related to initial contracts and such expense is recognized over a period associated with the revenue of the related portfolio, which is generally two three Total capitalized costs for the year ended December 31, 2018 $5.2 $1.3 December 31, 2018
Cost of Sales, Policy [Policy Text Block]	Cost of Revenue Cost of revenue consists primarily of material, finished and semi-finished products purchased from third The Company's system sales include a control console, universal graphic user interface, control system software, high voltage electronics and a combination of applications (referred to as hand pieces). Hand pieces are programmed to have a limited number of uses to ensure the safety of the device to patients. The Company sells refurbished hand pieces, or "refills," of its Titan truSculpt 3D
Research and Development Expense, Policy [Policy Text Block]	Research and Development Expenditures Research and development costs are expensed as incurred and include costs related to research, design, development, testing of products, salaries, benefits and other headcount related costs, facilities, material, third
Advertising Costs, Policy [Policy Text Block]	Advertising Costs Advertising costs are included as part of sales and marketing expense and are expensed as incurred. Advertising expenses for 2018, 2017 2016 $2.8 $1.8 $1.3
Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]	Stock-based Compensation The Company accounts for share-based employee compensation plans using the fair value recognition and measurement provisions under U.S. GAAP. The Company’s share-based compensation cost is measured at the grant date, based on the fair value of the award, and is recognized as expense on a straight-line basis over the requisite service period. The Company estimates expected forfeitures at the time of grant and revises, if necessary, in subsequent periods if actual forfeitures differ from those estimated. Expected Term Expected Volatility: 50 50 Risk-Free Interest Rate: ● The fair value of stock options ("options") on the grant date is estimated using the Black-Scholes option-pricing model using the single-option approach. The Black-Scholes option pricing model requires the use of highly subjective and complex assumptions, including the option's expected term and the price volatility of the underlying stock, to determine the fair value of award. The Company recognizes the expense associated with options using a single award approach over the requisite service period. The Company accounts for all stock options awarded to non-employees at the fair value of the consideration received or the fair value of the equity instrument issued, as calculated using the Black-Scholes model. ● The fair value of restricted stock units is determined based on the closing quoted 50 ● The fair value of Performance Stock Units (“PSUs”) that have operational measurement goals, are measured at the 50 may not See Note 9
Income Tax, Policy [Policy Text Block]	Income Taxes The Company is subject to taxes on earnings in both the U.S. and various foreign jurisdictions. As a global taxpayer, significant judgments and estimates are required in evaluating our uncertain tax positions and determining our provision for income taxes on earnings. The Company recognizes tax benefits from uncertain tax positions only if it is more likely than not 50% The Company’s effective tax rates have differed from the statutory rate primarily due to changes in the valuation allowance, foreign operations, research and development tax credits, state taxes, and certain benefits realized related to stock option activity. The Company’s current effective tax rate does not Undistributed earnings of the Company’s foreign subsidiaries at December 31, 2018 no 2017 not not In December 2017, No. 118, 118” not one 2017 fourth 2017, December 31, 2017. 2017 fourth 2018. 2017 December 31, 2018. $0.4 $7.3 $0.4 118. In January 2018, 2017
Earnings Per Share, Policy [Policy Text Block]	Computation of Net Income ( Loss) per Share Basic net income per share is computed using the weighted average number of shares outstanding during the period. Diluted net income per share is computed using the weighted average number of the Company’s shares and dilutive potential shares outstanding during the period. Dilutive potential shares primarily consist of employee stock options, restricted stock units, and shares to be purchased by employees under the Company’s employee stock purchase plan. GAAP requires that employee equity share options, non-vested shares, and similar equity instruments granted by the Company be treated as potential common shares outstanding in computing diluted earnings per share. Diluted shares outstanding include the dilutive effect of equity awards, which is calculated based on the average share price for each fiscal period using the treasury stock method. Under the treasury stock method, the amount the employee must pay for exercising stock options and the amount of compensation cost for future service that the Company has not
Comprehensive Income, Policy [Policy Text Block]	Comprehensive Income (Loss) Comprehensive income (loss) includes all changes in stockholders’ equity except those resulting from investments or contributions by stockholders. For the periods presented, the accumulated other comprehensive income (loss) consisted solely of the unrealized gains or losses on the Company's available for- sale investments, net of tax.
Foreign Currency Transactions and Translations Policy [Policy Text Block]	Foreign Currency The U.S. Dollar is the functional currency of the Company’s subsidiaries. Monetary assets and liabilities are re-measured into U.S. Dollars at the applicable period end exchange rate. Sales and operating expenses are re-measured at average exchange rates in effect during each period. Gains or losses resulting from foreign currency transactions are included in net income (loss) and are insignificant for each of the three December 31, 2017. three December 31, 2018.
Segment Reporting, Policy [Policy Text Block]	Segments The Company operates in one one not December 31, 2018, 2017, 89% 98% 13

Note 1 - Summary of Significa_2

Note 1 - Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2018
Notes Tables
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]	As reported under ASC Topic 606 Adjustments Balances under Prior GAAP (In thousands) Other long-term assets $ 5,971 $ (5,217) $ 754 Deferred revenue 12,566 (106) 12,460 Retained earnings (deficit) (24,010) 4,610 (19,400) As reported under Topic 606 Adjustments Balances under Prior GAAP (In thousands) Products revenue $ 142,535 $ 274 $ 142,261 Service revenue 20,185 280 19,905 Sales and marketing 58,420 540 58,960 Interest and other income, net* (123) 297 174
Property, Plant, and Equipment Useful Lives [Table Text Block]	Useful Lives Leasehold improvements Lesser of useful life or term of lease Office equipment and furniture (in years) 3 Machinery and equipment (in years) 3

Note 2 - Investment Securities

Note 2 - Investment Securities (Tables)	12 Months Ended
	Dec. 31, 2018
Notes Tables
Investment [Table Text Block]	December 31, 201 8 20 1 7 Cash and cash equivalents: Cash $ 21,969 $ 14,058 Cash equivalents: Money market funds 4,083 126 Total cash and cash equivalents 26,052 14,184 Marketable securities: U.S. government notes 1,397 11,870 U.S. government agencies 2,677 — Municipal securities 200 200 Commercial paper 2,433 1,833 Corporate debt securities 2,816 7,825 Total marketable securities 9,523 21,728 Total cash, cash equivalents and marketable securities $ 35,575 $ 35,912
Unrealized Gain (Loss) on Investments [Table Text Block]	December 31, 201 8 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Market Value Cash and cash equivalents $ 26,052 $ — $ — $ 26,052 Marketable investments U.S. government notes 1,397 — — 1,397 U.S. government agencies 2,677 — — 2,677 Municipal securities 200 — — 200 Commercial paper 2,433 — — 2,433 Corporate debt securities 2,825 — (9 ) 2,816 Total marketable securities 9,532 (9 ) 9,523 Total cash, cash equivalents and marketable securities $ 35,584 $ $ (9 ) $ 35,575 December 31, 201 7 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Market Value Cash and cash equivalents $ 14,184 $ — $ — $ 14,184 Marketable investments U.S. government notes 11,885 — (15 ) 11,870 Municipal securities 201 — (1 ) 200 Commercial paper 1,836 — (3 ) 1,833 Corporate debt securities 7,838 2 (15 ) 7,825 Total marketable securities 21,760 2 (34 ) 21,728 Total cash, cash equivalents and marketable securities $ 35,944 $ 2 $ (34 ) $ 35,912
Investments Classified by Contractual Maturity Date [Table Text Block]	Amount Due in less than one year $ 9,121 Due in 1 to 3 years 402 Total marketable securities $ 9,523
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]	December 31, 201 8 Level 1 Level 2 Level 3 Total Cash equivalents: Money market funds $ 4,083 $ — $ — $ 4,083 Short term marketable investments: Available-for-sale securities — 9,523 — 9,523 Total assets at fair value $ 4,083 $ 9,523 $ — $ 13,606 December 31, 201 7 Level 1 Level 2 Level 3 Total Cash equivalents: Money market funds $ 126 $ — $ — $ 126 Commercial paper — — — — Short term marketable investments: Available-for-sale securities — 21,728 — 21,728 Total assets at fair value $ 126 $ 21,728 $ — $ 21,854

Note 3 - Balance Sheet Detail (

Note 3 - Balance Sheet Detail (Tables)	12 Months Ended
	Dec. 31, 2018
Notes Tables
Schedule of Inventory, Current [Table Text Block]	December 31, 201 8 201 7 Raw materials $ 16,991 $ 19,160 Work in process 2,306 2,744 Finished goods 8,717 6,878 Total $ 28,014 $ 28,782
Property, Plant and Equipment [Table Text Block]	December 31, 201 8 201 7 Leasehold improvements $ 660 $ 640 Office equipment and furniture 2,835 2,370 Machinery and equipment 7,304 6,277 10,799 9,287 Less: Accumulated depreciation (8,127) (7,191) Property and equipment, net $ 2,672 $ 2,096
Schedule of Intangible Assets and Goodwill [Table Text Block]	Gross Carrying Amount Accumulated Amortization & Impairment Amount Net Amount December 31, 201 8 Patent sublicense $ 1,218 $ 1,218 $ — Customer relationship intangible related to acquisition 2,510 2,510 — Other identified intangible assets related to acquisition 780 780 — Other intangible 155 155 — Goodwill 1,339 — 1,339 Total $ 6,002 $ 4,663 $ 1,339 December 31, 201 7 Patent sublicense $ 1,218 $ 1,218 $ — Customer relationship intangible related to acquisition 2,510 2,510 — Other identified intangible assets related to acquisition 780 780 — Other intangible 155 155 — Goodwill 1,339 — 1,339 Total $ 6,002 $ 4,663 $ 1,339
Schedule of Accrued Liabilities [Table Text Block]	December 31, 201 8 201 7 Accrued payroll and related expenses $ 9,377 $ 12,567 Sales and marketing accruals 2,379 3,710 Accrued sales tax 2,935 2,920 Warranty liability 4,666 3,508 Other accrued liabilities 3,943 4,143 Total $ 23,300 $ 26,848

Note 4 - Warranty and Extende_2

Note 4 - Warranty and Extended Services Contracts (Tables)	12 Months Ended
	Dec. 31, 2018
Notes Tables
Schedule of Product Warranty Liability [Table Text Block]	December 31, 201 8 201 7 Balance at beginning of year $ 3,508 $ 2,461 Add: Accruals for warranties issued during the period 9,205 7,583 Less: Warranty related expenses during the period (8,045 ) (6,536 ) Balance at end of year $ 4,668 $ 3,508

Note 5 - Deferred Revenue (Tabl

Note 5 - Deferred Revenue (Tables)	12 Months Ended
	Dec. 31, 2018
Notes Tables
Deferred Revenue, by Arrangement, Disclosure [Table Text Block]	December 31, 201 8 201 7 Balance at beginning of year $ 10,719 $ 9,431 Add: Payments received 14,882 14,369 Less: Revenue recognized (13,746 ) (13,081 ) Balance at end of year $ 11,855 $ 10,719

Note 6 - Stockholders' Equity_2

Note 6 - Stockholders' Equity, Stock Plans and Stock-based Compensation Expense (Tables)	12 Months Ended
	Dec. 31, 2018
Notes Tables
Share-based Compensation, Stock Options, Activity [Table Text Block]	Options Outstanding Shares Available For Grant Number of Shares Weighted- Average Exercise Price Weighted-Average Remaining Contractual Life (in years) Aggregate Intrinsic Value (in $ millions (1) Balances as of December 31, 2015 1,263,425 2,148,797 $ 9.31 3.4 $ 7.9 Options granted (162,000 ) 162,000 $ 11.55 Options exercised — (1,051,138 ) $ 8.89 Options cancelled (expired or forfeited) 143,187 (143,187 ) $ 12.93 Stock awards granted (1,018,005 ) — — Stock awards cancelled (expired or forfeited) 495,050 — — Balances as of December 31, 2016 721,657 1,116,472 $ 9.56 3.7 $ 8.7 Options granted (278,250 ) 278,250 $ 31.00 Options exercised — (488,398 ) $ 8.96 Options cancelled (expired or forfeited) 66,405 (66,405 ) $ 16.54 Stock awards granted (873,881 ) — — Stock awards cancelled (expired or forfeited) 258,935 — — Additional shares reserved (2) 1,600,000 — — Balances as of December 31, 2017 1,494,866 839,919 $ 16.46 3.99 $ 24.4 Options granted (21,010 ) 21,010 $ 50.65 Options exercised — (271,902 ) $ 9.99 Options cancelled (expired or forfeited) 81,322 (81,322 ) $ 21,55 Stock awards granted (562,070 ) Stock awards cancelled (expired or forfeited) 148,197 Balances as of December 31, 2018 1,141,305 507,705 $ 20.52 3.52 $ 2.00 Exercisable as of December 31, 2018 335,348 $ 14.68 2.73 $ 1.87 Vested and expected to vest, net of estimated forfeitures, as of December 31, 2018 485,469 $ 19.88 3.42 $ 19.86
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]	Exercise Prices Number Outstanding Contractual Life Number Outstanding $6.88 – $7.44 28,832 0.58 28,832 $8.80 97,268 1.44 97,268 $9.65 – $10.79 54,564 3.01 49,544 $10.80 – $11.24 57,521 3.18 47,293 $11.67 – $17.90 72,583 2.44 48,855 $18.55 – $25.70 71,250 5.21 28,512 $39.30 72,000 5.83 23,230 $43.40 6,510 6.45 — $47.40 38,927 5.86 10,564 $53.90 8,250 5.30 1,250
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]	Number of Weighted-Average Grant- Date Fair Aggregate Fair Value (1) Aggregate Intrinsic Value (2) Shares Value (in thousands) (in thousands) Outstanding at December 31, 2015 371,630 $ 12.39 $ 4,753 Granted 480,191 $ 10.80 Vested (3) (172,990 ) $ 12.56 $ 1,906 (5) Forfeited (233,514 ) $ 11.36 Outstanding at December 31, 2016 445,317 $ 11.15 $ 7,726 Granted 412,208 $ 28.74 Vested (3) (224,799 ) $ 10.91 $ 5,168 (6) Forfeited (122,139 ) $ 13.56 Outstanding at December 31, 2017 510,587 $ 24.88 $ 23,155 Granted 265,124 $ 44.57 Vested (3) (231,515 ) $ 21.10 $ 9,483 (6) Forfeited (69,905 ) $ 20.01 Outstanding at December 31, 2018 474,291 $ 38.44 $ 8,072
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]	Year Ended December 31, 201 8 201 7 201 6 Stock options $ 838 $ 815 $ 989 RSUs 4,648 1,813 1,508 PSUs 1,105 2,093 967 ESPP 566 389 249 Total stock-based compensation expense $ 7,157 $ 5,110 $ 3,713
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]	Year Ended December 31, 201 8 201 7 201 6 Cost of revenue $ 743 $ 660 $ 341 Sales and marketing 2,105 1,642 1,179 Research and development 824 936 596 General and administrative 3,485 1,872 1,597 Total stock-based compensation expense $ 7,157 $ 5,110 $ 3,713
Valuation Assumptions and Fair Value of Stock Options and ESPP Grants [Table Text Block]	Stock Options Stock Purchase Plan 201 8 201 7 201 6 201 8 201 7 201 6 Expected term (in years) (1) 3.7 3.70 3.83 0.50 0.50 0.50 Risk-free interest rate (2) 2.6 % 1.73 % 1.09 % 2.34 % 1.14 % 0.46 % Volatility (3) 44 % 40 % 40 % 61 % 42 % 39 % Dividend yield (4) — % — % — % — % — % — % Weighted average estimated fair value at grant date $ 18.0 $ 9.98 $ 3.72 $ 9.6 $ 8.21 $ 3.22

Note 7 - Income Taxes (Tables)

Note 7 - Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
Notes Tables
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]	Year Ended December 31, 201 8 201 7 201 6 U.S. $ (14,177 ) $ 11,203 $ 2,207 Foreign 662 757 513 Income (loss) before income taxes $ (13,515 ) $ 11,960 $ 2,720
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	Year Ended December 31, 201 8 201 7 201 6 Current: Federal $ (15) $ 148 $ — State 123 71 16 Foreign 303 511 131 Total Current 411 730 147 Deferred: Federal 15,674 (17,393) (24) State 1,230 (1,348) (2) Foreign (60) (22) 22 Total Deferred 16,844 (18,763) (4) Tax provision $ 17,255 $ (18,033) $ 143
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	December 31, 201 8 201 7 Net operating loss carryforwards $ 11,227 $ 8,604 Stock-based compensation 1,040 1,179 Other accruals and reserves 1,924 1,663 Credits 10,857 11,781 Foreign 457 399 Accrued warranty 1,863 847 Depreciation and amortization 2,024 1,592 Other 282 303 Deferred tax asset before valuation allowance 29,674 26,368 Valuation allowance (27,865) (7,242) Deferred tax asset after valuation allowance 1,809 19,126 Deferred tax liability (1,269) — Deferred tax liability on goodwill (83) (71) Net deferred tax asset $ 457 $ 19,055
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	Year Ended December 31, 201 8 2017* 2016* U.S. federal statutory income tax rate 21.00 % 34.00 % 34.00 % State tax rate (4.95) (5.59) (14.56) Meals and entertainment (2.66) 2.15 7.56 Stock-based compensation 13.66 (21.55) 14.36 SAB 118 Change in Estimate (2.43) — Foreign rate differential 0.11 (0.50) (0.16) Other (1.21) 0.65 (2.15) General business credit 4.31 (2.72) (9.25) Change in Federal Tax Rate — 60.98 — Valuation allowance (155.49) (218.17) (24.57) Effective tax rate (127.66) % (150.75) % 5.23 %
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]	Year Ended December 31, 201 8 201 7 201 6 Balance at beginning of year $ 1,519 $ 707 $ 651 Decreases related to prior year tax positions (70) 643 — Increases related to current year tax positions 114 169 56 Balance at end of year $ 1,563 $ 1,519 $ 707

Note 8 - Net Loss Per Share (Ta

Note 8 - Net Loss Per Share (Tables)	12 Months Ended
	Dec. 31, 2018
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	Year Ended December 31, 201 8 201 7 201 6 Numerator: Net Income(loss) $ (30,770) $ 29,993 $ 2,577 Denominator: Weighted average shares of common stock outstanding used in computing net income (loss) per share, basic 13,771 13,873 13,225 Dilutive effect of incremental shares and share equivalents — 855 528 Weighted average shares of common stock outstanding used in computing net income (loss) per share, diluted 13,771 14,728 13,753 Net income(loss) per share: Net income (loss) per share, basic $ (2.23) $ 2.16 $ 0.19 Net income (loss) per share, diluted $ (2.23) $ 2.04 $ 0.19
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]	Year Ended December 31, 201 8 201 7 201 6 Options to purchase common stock 664 42 220 Restricted stock units 432 9 24 Employee stock purchase plan shares 133 — — Performance stock units 43 — — Total 1,272 51 244

Note 10 - Segment Information_2

Note 10 - Segment Information and Revenue by Geography and Products (Tables)	12 Months Ended
	Dec. 31, 2018
Notes Tables
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]	Year Ended December 31, 201 8 201 7 201 6 Revenue mix by geography: United States $ 101,862 $ 94,581 $ 65,513 Japan 17,819 17,264 14,727 Asia, excluding Japan 15,467 13,719 13,445 Europe 8,875 8,317 7,539 Rest of the world 18,696 17,612 16,832 Total Consolidated revenue $ 162,720 $ 151,493 $ 118,056 Revenue mix by product category: Systems $ 132,594 $ 125,883 $ 92,721 Consumables 4,162 2,435 2,498 Skincare 5,778 4,342 3,809 Total product revenue 142,535 132,660 99,028 Service 20,185 18,833 19,028 Total Consolidated revenue $ 162,720 $ 151,493 $ 118,056

Note 11 - Commitments and Con_2

Note 11 - Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2018
Notes Tables
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]	Year Ending December 31, Amount 2019 $ 3,011 2020 2,939 2021 2,564 2022 2,495 2023 and thereafter 214 Future minimum rental payments $ 11,223
Schedule of Future Minimum Lease Payments for Capital Leases [Table Text Block]	Year Ending December 31, Amount 2019 $ 576 2020 287 2021 152 Future minimum lease payments $ 1,015

Supplementary Financial Data _2

Supplementary Financial Data (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2018
Notes Tables
Quarterly Financial Information [Table Text Block]	Quarter ended: Dec. 31, 201 8 Sept. 30, 201 8 June 30, 201 8 March 31, 201 8 Dec. 31, 201 7 Sept. 30, 201 7 June 30, 201 7 March 31, 201 7 Net revenue $ 45,469 $ 40,573 $ 42,553 $ 34,125 $ 47,632 $ 38,173 $ 36,389 $ 29,299 Cost of revenue 26,683 18,688 20,176 16,791 20,299 15,963 15,343 13,778 Gross profit 18,786 21,885 22,377 17,334 27,333 22,210 21,046 15,521 Operating expenses: Sales and marketing 15,318 14,479 15,535 13,088 15,362 13,148 12,787 10,773 Research and development 3,464 3,244 4,095 3,556 3,481 3,467 2,981 2,945 General and administrative 5,494 5,160 4,902 5,439 3,947 3,379 3,548 3,216 Lease termination income — — — — — (4,000 ) — — Total operating expenses 24,276 22,883 24,532 22,083 22,790 15,994 19,316 16,934 Income (loss) from operations (5,490 ) (998 ) (2,155 ) (4,749 ) 4,543 6,216 1,730 (1,413 ) Interest and other income, net (44 ) (49 ) (129 ) 98 138 197 276 273 Income (loss) before income taxes (5,534 ) (1,047 ) (2,284 ) (4,651 ) 4,681 6,413 2,006 (1,140 ) Income tax provision 20,760 (174 ) (712 ) (2,619 ) (18,199 ) 225 59 (118 ) Net income (loss) $ (26,293 ) $ (873 ) $ (1,572 ) $ (2,032 ) $ 22,880 $ 6,188 $ 1,947 $ (1,022 ) Net income (loss) per share—basic $ (1.89 ) $ (0.06 ) $ (0.11 ) $ (0.15 ) $ 1.66 $ 0.44 $ 0.14 $ (0.07 ) Net income (loss) per share—diluted $ (1.89 ) $ (0.06 ) $ (0.11 ) $ (0.15 ) $ 1.57 $ 0.42 $ 0.13 $ (0.07 ) Weighted average number of shares used in per share calculations: Basic 13,932 13,851 13,709 13,587 13,744 13,973 13,935 13,840 Diluted 13,932 13,851 13,709 13,587 14,569 14,767 14,629 13,840

Schedule II - Valuation and Q_2

Schedule II - Valuation and Qualifying Accounts (Tables)	12 Months Ended
	Dec. 31, 2018
Notes Tables
Summary of Valuation Allowance [Table Text Block]	Balance at Beginning of Year Additions Deductions Balance at End of Year Deferred tax assets valuation allowance Year ended December 31, 2018 $ 7,242 $ 22,770 $ 2,147 $ 27,865 Year ended December 31, 2017 $ 31,751 $ 617 $ 25,126 $ 7,242 Year ended December 31, 2016 $ 27,616 $ 6,755 $ 2,620 $ 31,751 Balance at Beginning of Year Additions Deductions Balance at End of Year Allowance for doubtful accounts receivable Year ended December 31, 2018 $ 9 $ 1,880 $ 632 $ 1,257 Year ended December 31, 2017 $ 21 $ 14 $ 26 $ 9 Year ended December 31, 2016 $ 4 $ 21 $ 4 $ 21

Note 1 - Summary of Significa_3

Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 01, 2019	Jan. 01, 2018
Cumulative Effect of New Accounting Principle in Period of Adoption		$ 3,813,000
Deferred Revenue	$ 11,855,000	10,719,000	$ 9,431,000
Revenue from Contract with Customer, Including Assessed Tax	162,720,000	151,493,000	118,056,000
Impairment of Long-Lived Assets Held-for-use	0	0	0
Inventory, Finished Goods, Gross, Total	2,900,000	1,900,000
Depreciation, Total	$ 1,200,000	1,000,000	800,000
Number of Operating Segments	1
Advertising Expense	$ 2,800,000	1,800,000	1,300,000
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability	400,000	7,300,000
Selling and Marketing Expense [Member]
Capitalized Contract Cost, Amortization	1,800,000
Other Noncurrent Assets [Member]
Capitalized Contract Cost, Net, Total	5,200,000
UNITED STATES
Revenue from Contract with Customer, Including Assessed Tax	$ 101,862,000	$ 94,581,000	$ 65,513,000
Percentage of Assets	89.00%	98.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member]
Concentration Risk, Percentage	4.90%	4.90%
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | UNITED STATES
Concentration Risk, Percentage	62.00%	62.00%	55.00%
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | Outside the United States [Member]
Concentration Risk, Percentage	37.00%	38.00%	45.00%
Service [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 20,185,000	$ 18,833,000	$ 19,028,000
Bill and Hold Arrangement [Member]
Revenue from Contract with Customer, Including Assessed Tax		938,000	$ 0
Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption		$ 3,813,000
Accounting Standards Update 2014-09 [Member]
Deferred Revenue					$ (237,000)
Extended Product Warranty Accrual, Ending Balance					151,000
Variable Consideration					210,000
Capitalized Contract Cost, Net, Total					4,700,000
Deferred Tax Liabilities, Net, Noncurrent					1,200,000
Accounting Standards Update 2014-09 [Member] | Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption					$ 3,800,000
Minimum [Member] | Distributors [Member]
Standard Warranty Period	1 year 60 days
Minimum [Member] | Subsequent Event [Member] | Accounting Standards Update 2016-02 [Member]
Finance Lease, Liability, Total				$ 10,000,000
Operating Lease, Right-of-Use Asset				10,500,000
Maximum [Member] | Distributors [Member]
Standard Warranty Period	1 year 120 days
Maximum [Member] | Subsequent Event [Member] | Accounting Standards Update 2016-02 [Member]
Finance Lease, Liability, Total				11,000,000
Operating Lease, Right-of-Use Asset				$ 11,000,000

Note 1 - Summary of Significa_4

Note 1 - Summary of Significant Accounting Policies - Summary of Effects of Adopting Topic 606 on the Condensed Consolidated Financial Statements (Details) - USD ($)		3 Months Ended								12 Months Ended
		Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018		Dec. 31, 2017	Dec. 31, 2016	Jan. 01, 2018
Other long-term assets		$ 5,971,000				$ 374,000				$ 5,971,000		$ 374,000
Deferred revenue		11,855,000				10,719,000				11,855,000		10,719,000	$ 9,431,000
Retained earnings (deficit)		(24,010,000)				2,947,000				(24,010,000)		2,947,000
Products revenue										162,720,000		151,493,000	118,056,000
Sales and marketing		15,318,000	$ 14,479,000	$ 15,535,000	$ 13,088,000	15,362,000	$ 13,148,000	$ 12,787,000	$ 10,773,000	58,420,000		52,070,000	41,563,000
Interest and other income(expense), net		(44,000)	$ (49,000)	$ (129,000)	$ 98,000	$ 138,000	$ 197,000	$ 276,000	$ 273,000	(123,000)	[1]	884,000	323,000
Accounting Standards Update 2014-09 [Member]
Deferred revenue														$ (237,000)
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Other long-term assets		(5,217,000)								(5,217,000)
Deferred revenue		(106,000)								(106,000)
Retained earnings (deficit)		4,610,000								4,610,000
Interest and other income(expense), net	[1]									297,000
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Other long-term assets		754,000								754,000
Deferred revenue		12,460,000								12,460,000
Retained earnings (deficit)		$ (19,400,000)								(19,400,000)
Interest and other income(expense), net	[1]									174,000
Product [Member]
Products revenue										142,535,000		132,660,000	99,028,000
Sales and marketing										58,420,000
Product [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Products revenue										274,000
Sales and marketing										540,000
Product [Member] | Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Products revenue										142,261,000
Sales and marketing										58,960,000
Service [Member]
Products revenue										20,185,000		$ 18,833,000	$ 19,028,000
Service [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Products revenue										280,000
Service [Member] | Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Products revenue										$ 19,905,000
[1]	Included in interest and other income, net, is the estimated interest expense for advance payment related to service contracts under the new revenue standard.

Note 1 - Summary of Significa_5

Note 1 - Summary of Significant Accounting Policies - Useful Lives of Property, Plant and Equipment (Details)	12 Months Ended
	Dec. 31, 2018
Equipment and Furniture [Member]
Property, plant, and equipment, useful lives (Year)	3 years
Machinery and Equipment [Member]
Property, plant, and equipment, useful lives (Year)	3 years

Note 2 - Investment Securitie_2

Note 2 - Investment Securities (Details Textual) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 0	$ 0

Note 2 - Investment Securitie_3

Note 2 - Investment Securities - Cash, Cash Equivalents and Marketable Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Cash	$ 21,969	$ 14,058
Cash equivalents	26,052	14,184
Marketable securities	9,523	21,728
Total cash, cash equivalents and marketable securities	35,575	35,912
US Treasury and Government [Member]
Marketable securities	1,397	11,870
US Government Agencies Debt Securities [Member]
Marketable securities	2,677
US States and Political Subdivisions Debt Securities [Member]
Marketable securities	200	200
Corporate Debt Securities [Member]
Marketable securities	2,816	7,825
Money Market Funds [Member]
Cash equivalents	4,083	126
Commercial Paper [Member]
Cash equivalents	$ 2,433	$ 1,833

Note 2 - Investment Securitie_4

Note 2 - Investment Securities - Unrealized Gains and Losses Related to Marketable Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash and cash equivalents, Amortized Cost	$ 26,052	$ 14,184	$ 13,775	$ 10,868
Cash and cash equivalents, Fair Market Value	26,052	14,184
Marketable investments, Amortized Cost	9,532	21,760
Marketable investments, Gross Unrealized Gains		2
Marketable investments, Gross Unrealized Losses	(9)	(34)
Marketable investments, Fair Market Value	9,523	21,728
Marketable investments, Gross Unrealized Losses	9	34
Total cash, cash equivalents and marketable securities, Amortized Cost	35,584	35,944
Total cash, cash equivalents and marketable securities, Fair Market Value	35,575	35,912
US Treasury and Government [Member]
Marketable investments, Amortized Cost	1,397	11,885
Marketable investments, Gross Unrealized Gains
Marketable investments, Gross Unrealized Losses		(15)
Marketable investments, Fair Market Value	1,397	11,870
Marketable investments, Gross Unrealized Losses		15
US Government Agencies Debt Securities [Member]
Marketable investments, Amortized Cost	2,677
Marketable investments, Gross Unrealized Gains
Marketable investments, Gross Unrealized Losses
Marketable investments, Fair Market Value	2,677
Marketable investments, Gross Unrealized Losses
US States and Political Subdivisions Debt Securities [Member]
Marketable investments, Amortized Cost	200	201
Marketable investments, Gross Unrealized Gains
Marketable investments, Gross Unrealized Losses		(1)
Marketable investments, Fair Market Value	200	200
Marketable investments, Gross Unrealized Losses		1
Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Marketable investments, Amortized Cost	2,433	1,836
Marketable investments, Gross Unrealized Gains
Marketable investments, Gross Unrealized Losses		(3)
Marketable investments, Fair Market Value	2,433	1,833
Marketable investments, Gross Unrealized Losses		3
Corporate Debt Securities [Member]
Marketable investments, Amortized Cost	2,825	7,838
Marketable investments, Gross Unrealized Gains		2
Marketable investments, Gross Unrealized Losses	(9)	(15)
Marketable investments, Fair Market Value	2,816	7,825
Marketable investments, Gross Unrealized Losses	$ 9	$ 15

Note 2 - Investment Securitie_5

Note 2 - Investment Securities - Maturities of Available-for-sale Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Due in less than one year	$ 9,121
Due in 1 to 3 years	402
Total marketable securities	$ 9,523	$ 21,728

Note 2 - Investment Securitie_6

Note 2 - Investment Securities - Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Cash equivalents	$ 26,052	$ 14,184
Available-for-sale securities	9,523	21,728
Fair Value, Measurements, Recurring [Member]
Available-for-sale securities	9,523	21,728
Total assets at fair value	13,606	21,854
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Available-for-sale securities
Total assets at fair value	4,083	126
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Available-for-sale securities	9,523	21,728
Total assets at fair value	9,523	21,728
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Available-for-sale securities
Total assets at fair value
Money Market Funds [Member] | Fair Value, Measurements, Recurring [Member]
Cash equivalents	4,083	126
Money Market Funds [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Cash equivalents	4,083	126
Money Market Funds [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Cash equivalents
Money Market Funds [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Cash equivalents
Commercial Paper [Member] | Fair Value, Measurements, Recurring [Member]
Cash equivalents
Commercial Paper [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Cash equivalents
Commercial Paper [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Cash equivalents
Commercial Paper [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Cash equivalents

Note 3 - Balance Sheet Detail_2

Note 3 - Balance Sheet Detail (Details Textual) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Capital Leased Assets, Gross, Total	$ 1,900,000	$ 1,900,000	$ 1,600,000
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation	1,100,000	1,100,000	700,000
Property, Plant and Equipment, Net, Ending Balance	2,672,000	2,672,000	2,096,000
Amortization of Intangible Assets, Total		0	2,000	$ 141,000
Loss Contingency Accrual, Product Liability, Net, Total	5,000,000	5,000,000
Product Liability Accrual, Period Expense	1,100,000
Extended Product Warranty Accrual, Current	3,159,000	3,159,000
Accrued Liabilities, Current [Member]
Loss Contingency Accrual, Product Liability, Net, Total	800,000	800,000
Construction in Progress [Member]
Property, Plant and Equipment, Net, Ending Balance	$ 0.40	$ 0.40

Note 3 - Balance Sheet Detail -

Note 3 - Balance Sheet Detail - Inventories (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Raw materials	$ 16,991	$ 19,160
Work in process	2,306	2,744
Finished goods	8,717	6,878
Total	$ 28,014	$ 28,782

Note 3 - Balance Sheet Detail_3

Note 3 - Balance Sheet Detail - Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Property, plant and equipment, gross	$ 10,799	$ 9,287
Less: Accumulated depreciation	(8,127)	(7,191)
Property and equipment, net	2,672	2,096
Leasehold Improvements [Member]
Property, plant and equipment, gross	660	640
Equipment and Furniture [Member]
Property, plant and equipment, gross	2,835	2,370
Machinery and Equipment [Member]
Property, plant and equipment, gross	$ 7,304	$ 6,277

Note 3 - Balance Sheet Detail_4

Note 3 - Balance Sheet Detail - Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accumulated amortization and impairment amount	$ 4,663	$ 4,663
Goodwill	1,339	1,339
Goodwill	1,339	1,339
Total	6,002	6,002
Total	1,339	1,339
Patents [Member]
Gross carrying amount	1,218	1,218
Accumulated amortization and impairment amount	1,218	1,218
Net amount
Customer Relationships [Member]
Gross carrying amount	2,510	2,510
Accumulated amortization and impairment amount	2,510	2,510
Net amount
Other Intangible Assets [Member]
Gross carrying amount	780	780
Accumulated amortization and impairment amount	780	780
Net amount
Other Intangible [Member]
Gross carrying amount	155	155
Accumulated amortization and impairment amount	155	155
Net amount

Note 3 - Balance Sheet Detail_5

Note 3 - Balance Sheet Detail - Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accrued payroll and related expenses	$ 9,377	$ 12,567
Sales and marketing accruals	2,379	3,710
Accrued sales tax	2,935	2,920
Warranty liability	4,666	3,508
Other accrued liabilities	3,943	4,143
Total	$ 23,300	$ 26,848

Note 4 - Warranty and Extende_3

Note 4 - Warranty and Extended Services Contracts (Details Textual) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Extended Product Warranty Accrual, Current	$ 3,159

Note 4 - Warranty and Extende_4

Note 4 - Warranty and Extended Services Contracts - Summary of Warranties (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Balance at beginning of year	$ 3,508	$ 2,461
Add: Accruals for warranties issued during the period	9,205	7,583
Less: Warranty related expenses during the period	(8,045)	(6,536)
Balance at end of year	$ 4,668	$ 3,508

Note 5 - Deferred Revenue (Deta

Note 5 - Deferred Revenue (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue, Remaining Performance Obligation, Percentage	79.00%
Revenue, Remaining Performance Obligation, Amount	$ 12,600
Deferred Revenue Costs Incurred	7,800	$ 6,000	$ 6,700
Extended Product Warranty Accrual, Current	$ 3,159

Note 5 - Deferred Revenue - Sum

Note 5 - Deferred Revenue - Summary of Deferred Service Contract Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Deferred service contract revenue	$ 10,719	$ 9,431
Add: Payments received	14,882	14,369
Less: Revenue recognized	(13,746)	(13,081)
Deferred service contract revenue	$ 11,855	$ 10,719

Note 6 - Stockholders' Equity_3

Note 6 - Stockholders' Equity, Stock Plans and Stock-based Compensation Expense (Details Textual) - USD ($)	Dec. 15, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2013	Oct. 31, 2017	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value		$ 8,300,000	$ 8,000,000	$ 3,600,000
Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options, Net		$ 1,300,000	$ 4,000,000	$ 9,500,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross		21,010	278,250	162,000
Shares Paid for Tax Withholding for Share Based Compensation		77,049	64,490	56,157
Adjustments Related to Tax Withholding for Share-based Compensation		$ 3,130,360	$ 11,471,000	$ 619,000
Minimum [Member]
Share Based Compensation, Forfeiture Rate			0.00%
Maximum [Member]
Share Based Compensation, Forfeiture Rate			17.00%
Non-employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross			7,745
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period					3 years
Option Granted Contractual Term					7 years
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total		$ 12,800,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition		2 years 229 days
Employee Stock Option [Member] | Non-employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		4 years
Employee Stock Option [Member] | Non-employees [Member] | Vesting on First Anniversary of Grant Date [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage		25.00%
Employee Stock Option [Member] | Non-employees [Member] | Vesting Each Month After First Anniversary of Grant Date [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage		0.02083%
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period		265,124	412,208	480,191
Share Price		$ 17.02	$ 45.35	$ 17.35			$ 12.79
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value		$ 4,900,000	$ 2,500,000	$ 2,200,000
Restricted Stock Units (RSUs) [Member] | Non-employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		4 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period		3,384	2,478	0
Restricted Stock Units (RSUs) [Member] | Non-employees [Member] | Vesting Each Anniversary of Grant Date [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage		25.00%
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted		49,498	117,418	204,976
Stock Purchase Plan [Member]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total		$ 272,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition		120 days
1998 Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized		4,650,000
Two Thousand Four Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized		1,750,000
Number of Stock Awards Counted for Every Share Granted or Canceled		2.12
Share Based Compensation by Share Based Payment Fully Vested Stock Awards Grant Date Fair Value					$ 60,000
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures, Total		13,392	21,605	45,350
Two Thousand Four Equity Incentive Plan [Member] | Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		4 years
Option Exercisable in Hundredths		25.00%
Share Price		$ 17.02	$ 45.35	$ 17.35			$ 12.79
Two Thousand Four Equity Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period				4 years
Share Based Compensation by Share Based Payment Fully Vested Stock Awards Grant Date Fair Value						$ 60,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period				6,500
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period		120,273	270,707	229,865
Two Thousand Four Equity Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member] | President and Chief Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period	100,000
Two Thousand Four Equity Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member] | President and Chief Executive Officer [Member] | Share-based Compensation Award, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	15.00%
Two Thousand Four Equity Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member] | President and Chief Executive Officer [Member] | Share-based Compensation Award, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	15.00%
Two Thousand Four Equity Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member] | President and Chief Executive Officer [Member] | Share-based Compensation Award, Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	25.00%
Two Thousand Four Equity Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member] | President and Chief Executive Officer [Member] | Share-based Compensation Award, Tranche Four [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	45.00%
2004 Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized		600,000
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent		85.00%
Stock Issued During Period, Shares, Employee Stock Ownership Plan		64,511	78,479	79,922
Common Stock, Capital Shares Reserved for Future Issuance		627,073

Note 6 - Stockholders' Equity_4

Note 6 - Stockholders' Equity, Stock Plans and Stock-based Compensation Expense - Activity Under the 2004 Equity Incentive Plan (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Balances, shares available for grant (in shares)		1,494,866	721,657	1,263,425
Balances, stock options outstanding (in shares)		839,919	1,116,472	2,148,797
Balances, weighted-average exercise price (in dollars per share)		$ 16.46	$ 9.56	$ 9.31
Balances, options outstanding weighted-average remaining contractual life (Year)		3 years 189 days	3 years 361 days	3 years 255 days	3 years 146 days
Balances, aggregate intrinsic value	[1]	$ 2,000	$ 24,400	$ 8,700	$ 7,900
Options granted, shares available for grant (in shares)		(21,010)	(278,250)	(162,000)
Options granted, stock options outstanding (in shares)		21,010	278,250	162,000
Options granted, weighted-average exercise price (in dollars per share)		$ 50.65	$ 31	$ 11.55
Options exercised, stock options outstanding (in shares)		(271,902)	(488,398)	(1,051,138)
Options exercised, weighted-average exercise price (in dollars per share)		$ 9.99	$ 8.96	$ 8.89
Options cancelled (expired or forfeited), shares available for grant (in shares)		81,322	66,405	143,187
Options cancelled (expired or forfeited), stock options outstanding (in shares)		(81,322)	(66,405)	(143,187)
Options cancelled (expired or forfeited), weighted-average exercise price (in dollars per share)		$ 2,155	$ 16.54	$ 12.93
Stock awards granted, shares available for grant (in shares)		(562,070)	(873,881)	(1,018,005)
Stock awards cancelled (expired or forfeited), shares available for grant (in shares)		148,197	258,935	495,050
Additional shares reserved, shares available for grant (in shares)	[2]		1,600,000
Balances, shares available for grant (in shares)		1,141,305	1,494,866	721,657	1,263,425
Balances, stock options outstanding (in shares)		507,705	839,919	1,116,472	2,148,797
Balances, weighted-average exercise price (in dollars per share)		$ 20.52	$ 16.46	$ 9.56	$ 9.31
Exercisable, stock options outstanding (in shares)		335,348
Exercisable, weighted-average exercise price (in dollars per share)		$ 14.68
Exercisable, options outstanding weighted-average remaining contractual life (Year)		2 years 266 days
Exercisable, aggregate intrinsic value	[1]	$ 1,870
Vested and expected to vest (in shares)		485,469
Vested and expected to vest, weighted-average exercise price (in dollars per share)		$ 19.88
Vested and expected to vest, weighted-average remaining contractual life (Year)		3 years 153 days
Vested and expected to vest, aggregate intrinsic value	[1]	$ 19,860
[1]	Based on the closing stock price of $17.02 of the Company’s stock on December 31, 2018, $45.35 on December 30, 2017, $17.35 on December 31 2016 and $12.79 on December 31, 2015.
[2]	Approved by the board of directors and stockholders in 2017..

Note 6 - Stockholders' Equity_5

Note 6 - Stockholders' Equity, Stock Plans and Stock-based Compensation Expense - Options Outstanding and Exercisable Price Ranges (Details)	12 Months Ended
	Dec. 31, 2018$ / sharesshares
Exercise Price Range 1 [Member]
Range of exercise prices, lower limit (in dollars per share) | $ / shares	$ 6.88
Range of exercise prices, upper limit (in dollars per share) | $ / shares	$ 7.44
Options outstanding, number outstanding (in shares)	28,832
Options outstanding, weighted-average remaining contractual life (Year)	211 days
Options exercisable, number outstanding (in shares)	28,832
Exercise Price Range 2 [Member]
Options outstanding, number outstanding (in shares)	97,268
Options outstanding, weighted-average remaining contractual life (Year)	1 year 160 days
Options exercisable, number outstanding (in shares)	97,268
Range of exercise prices (in dollars per share) | $ / shares	$ 8.80
Exercise Price Range 3 [Member]
Range of exercise prices, lower limit (in dollars per share) | $ / shares	9.65
Range of exercise prices, upper limit (in dollars per share) | $ / shares	$ 10.79
Options outstanding, number outstanding (in shares)	54,564
Options outstanding, weighted-average remaining contractual life (Year)	3 years 3 days
Options exercisable, number outstanding (in shares)	49,544
Exercise Price Range 4 [Member]
Range of exercise prices, lower limit (in dollars per share) | $ / shares	$ 10.80
Range of exercise prices, upper limit (in dollars per share) | $ / shares	$ 11.24
Options outstanding, number outstanding (in shares)	57,521
Options outstanding, weighted-average remaining contractual life (Year)	3 years 65 days
Options exercisable, number outstanding (in shares)	47,293
Exercise Price Range 5 [Member]
Range of exercise prices, lower limit (in dollars per share) | $ / shares	$ 11.67
Range of exercise prices, upper limit (in dollars per share) | $ / shares	$ 17.90
Options outstanding, number outstanding (in shares)	72,583
Options outstanding, weighted-average remaining contractual life (Year)	2 years 160 days
Options exercisable, number outstanding (in shares)	48,855
Exercise Price Range 6 [Member]
Range of exercise prices, lower limit (in dollars per share) | $ / shares	$ 18.55
Range of exercise prices, upper limit (in dollars per share) | $ / shares	$ 25.70
Options outstanding, number outstanding (in shares)	71,250
Options outstanding, weighted-average remaining contractual life (Year)	5 years 76 days
Options exercisable, number outstanding (in shares)	28,512
Exercise Price Range 7 [Member]
Options outstanding, number outstanding (in shares)	72,000
Options outstanding, weighted-average remaining contractual life (Year)	5 years 302 days
Options exercisable, number outstanding (in shares)	23,230
Range of exercise prices (in dollars per share) | $ / shares	$ 39.30
Exercise Price Range 8 [Member]
Options outstanding, number outstanding (in shares)	6,510
Options outstanding, weighted-average remaining contractual life (Year)	6 years 164 days
Options exercisable, number outstanding (in shares)
Range of exercise prices (in dollars per share) | $ / shares	$ 43.40
Exercise Price Range 9 [Member]
Options outstanding, number outstanding (in shares)	38,927
Options outstanding, weighted-average remaining contractual life (Year)	5 years 313 days
Options exercisable, number outstanding (in shares)	10,564
Range of exercise prices (in dollars per share) | $ / shares	$ 47.40
Exercise Price Range 10 [Member]
Options outstanding, number outstanding (in shares)	8,250
Options outstanding, weighted-average remaining contractual life (Year)	5 years 109 days
Options exercisable, number outstanding (in shares)	1,250
Range of exercise prices (in dollars per share) | $ / shares	$ 53.90

Note 6 - Stockholders' Equity_6

Note 6 - Stockholders' Equity, Stock Plans and Stock-based Compensation Expense - Restricted Stock Units Activity (Details) - Restricted Stock Units (RSUs) [Member] - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016		Dec. 31, 2015
Outstanding, number of shares (in shares)		510,587		445,317		371,630
Outstanding, weighted-average grant date fair value (in dollars per share)		$ 24.88		$ 11.15		$ 12.39
Outstanding, aggregate intrinsic value	[1]	$ 8,072		$ 23,155		$ 7,726		$ 4,753
Granted, number of shares (in shares)		265,124		412,208		480,191
Granted, weighted-average grant date fair value (in dollars per share)		$ 44.57		$ 28.74		$ 10.80
Vested, number of shares (in shares)	[2]	(231,515)		(224,799)		(172,990)
Vested, weighted-average grant date fair value (in dollars per share)	[2]	$ 21.10		$ 10.91		$ 12.56
Vested, aggregate fair value	[2],[4]	$ 9,483	[3]	$ 5,168	[5]	$ 1,906	[6]
Forfeited, number of shares (in shares)		(69,905)		(122,139)		(233,514)
Forfeited, weighted-average grant date fair value (in dollars per share)		$ 20.01		$ 13.56		$ 11.36
Outstanding, number of shares (in shares)		474,291		510,587		445,317
Outstanding, weighted-average grant date fair value (in dollars per share)		$ 38.44		$ 24.88		$ 11.15
[1]	Based on the closing stock price of the Company's stock of $ 17.02 on December 31, 2018, $45.35 on December 31, 2017, $17.35 on December 31, 2016 and $12.79 on December 30, 2015.
[2]	The number of restricted stock units vested includes shares that the Company withheld on behalf of the employees to satisfy the statutory tax withholding requirements.
[3]	On the grant date, the fair value for these vested awards was $4.9 million.
[4]	Represents the value of the Company's stock on the date that the restricted stock units and performance stock units vest.
[5]	On the grant date, the fair value for these vested awards was $2.5 million.
[6]	On the grant date, the fair value for these vested awards was $2.2 million.

Note 6 - Stockholders' Equity_7

Note 6 - Stockholders' Equity, Stock Plans and Stock-based Compensation Expense - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Allocated share-based compensation expense	$ 7,157	$ 5,110	$ 3,713
Employee Stock Option [Member]
Allocated share-based compensation expense	838	815	989
Restricted Stock Units (RSUs) [Member]
Allocated share-based compensation expense	4,648	1,813	1,508
Performance Shares [Member]
Allocated share-based compensation expense	1,105	2,093	967
ESPP [Member]
Allocated share-based compensation expense	$ 566	$ 389	$ 249

Note 6 - Stockholders' Equity_8

Note 6 - Stockholders' Equity, Stock Plans and Stock-based Compensation Expense - Stock-based Compensation Expense by Department (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Allocated share-based compensation expense	$ 7,157	$ 5,110	$ 3,713
Cost of Sales [Member]
Allocated share-based compensation expense	743	660	341
Selling and Marketing Expense [Member]
Allocated share-based compensation expense	2,105	1,642	1,179
Research and Development Expense [Member]
Allocated share-based compensation expense	824	936	596
General and Administrative Expense [Member]
Allocated share-based compensation expense	$ 3,485	$ 1,872	$ 1,597

Note 6 - Stockholders' Equity_9

Note 6 - Stockholders' Equity, Stock Plans and Stock-based Compensation Expense - Valuation Assumptions and Fair Value of Stock Option and ESPP Grants (Details) - $ / shares		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Employee Stock Option [Member]
Expected term (in years) (Year)	[1]	3 years 255 days	3 years 255 days	3 years 302 days
Risk-free interest rate	[2]	2.60%	1.73%	1.09%
Volatility	[3]	44.00%	40.00%	40.00%
Dividend yield	[4]
Weighted average estimated fair value at grant date (in dollars per share)		$ 18	$ 9.98	$ 3.72
Stock Purchase Plan [Member]
Expected term (in years) (Year)	[1]	182 days	182 days	182 days
Risk-free interest rate	[2]	2.34%	1.14%	0.46%
Volatility	[3]	61.00%	42.00%	39.00%
Dividend yield	[4]
Weighted average estimated fair value at grant date (in dollars per share)		$ 9.60	$ 8.21	$ 3.22
[1]	The expected term represents the period during which the Company's stock-based awards are expected to be outstanding. The estimated term is based on historical experience of similar awards, giving consideration to the contractual terms of the awards, vesting requirements, and expectation of future employee behavior, including post-vesting terminations. The expected term of groups of employees that have similar historical exercise patterns has been considered separately for valuation purposes.
[2]	The risk-free interest rate is based on U.S. Treasury debt securities with maturities close to the expected term of the option as of the date of grant.
[3]	Estimated volatility is based on historical volatility. The Company also considers implied volatility when there is sufficient volume of freely traded options with comparable terms and exercise prices in the open market.
[4]	The Company has not historically issued any dividends and does not expect to do so in the foreseeable future.

Note 7 - Income Taxes (Details

Note 7 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability	$ 400,000	$ 7,300,000
Open Tax Year	2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	$ 107,000
Federal and US State Except California [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount		$ (26,300,000)
Domestic Tax Authority [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	16,900,000
Operating Loss Carryforwards, Total	45,700,000
Operating Loss Carryforwards Without Expiration	11,800,000
Domestic Tax Authority [Member] | Research Tax Credit Carryforward [Member]
Tax Credit Carryforward, Amount	$ 6,700,000
Domestic Tax Authority [Member] | Earliest Tax Year [Member]
Operating Loss Carryforwards Expiration Year 1	2029
Domestic Tax Authority [Member] | Earliest Tax Year [Member] | Research Tax Credit Carryforward [Member]
Tax Credit Carryforward Expiration Year	2024
State and Local Jurisdiction [Member]
Operating Loss Carryforwards, Total	$ 20,500,000
State and Local Jurisdiction [Member] | Research Tax Credit Carryforward [Member] | California Franchise Tax Board [Member]
Tax Credit Carryforward, Amount	7,400,000
State and Local Jurisdiction [Member] | Research Tax Credit Carryforward [Member] | Massachusetts Department of Revenue [Member]
Tax Credit Carryforward, Amount	$ 300,000
State and Local Jurisdiction [Member] | Earliest Tax Year [Member] | Research Tax Credit Carryforward [Member] | Massachusetts Department of Revenue [Member]
Tax Credit Carryforward Expiration Year	2021

Note 7 - Income Taxes - Income

Note 7 - Income Taxes - Income (Loss) Before Provision for Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
U.S.									$ (14,177)	$ 11,203	$ 2,207
Foreign									662	757	513
Income (loss) before income taxes	$ (5,534)	$ (1,047)	$ (2,284)	$ (4,651)	$ 4,681	$ 6,413	$ 2,006	$ (1,140)	$ (13,515)	$ 11,960	$ 2,720

Note 7 - Income Taxes - Incom_2

Note 7 - Income Taxes - Income Tax Provision (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Federal									$ (15)	$ 148
State									123	71	16
Foreign									303	511	131
Total Current									411	730	147
Federal									15,674	(17,393)	(24)
State									1,230	(1,348)	(2)
Foreign									(60)	(22)	22
Total Deferred									16,844	(18,763)	(4)
Tax provision	$ 20,760	$ (174)	$ (712)	$ (2,619)	$ (18,199)	$ 225	$ 59	$ (118)	$ 17,255	$ (18,033)	$ 143

Note 7 - Income Taxes - Deferre

Note 7 - Income Taxes - Deferred Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Net operating loss carryforwards	$ 11,227	$ 8,604
Stock-based compensation	1,040	1,179
Other accruals and reserves	1,924	1,663
Credits	10,857	11,781
Foreign	457	399
Accrued warranty	1,863	847
Depreciation and amortization	2,024	1,592
Other	282	303
Deferred tax asset before valuation allowance	29,674	26,368
Valuation allowance	(27,865)	(7,242)
Deferred tax asset after valuation allowance	1,809	19,126
Deferred tax liability	(1,269)
Deferred tax liability on goodwill	(83)	(71)
Net deferred tax asset	$ 457	$ 19,055

Note 7 - Income Taxes - Reconci

Note 7 - Income Taxes - Reconciliation of Effective Tax Rate (Details)		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
U.S. federal statutory income tax rate		21.00%	34.00%	34.00%
State tax rate		(4.95%)	(5.59%)	(14.56%)
Meals and entertainment	[1]	(2.66%)	2.15%	7.56%
Stock-based compensation		13.66%	(21.55%)	14.36%
SAB 118 Change in Estimate		(2.43%)
Foreign rate differential		0.11%	(0.50%)	(0.16%)
Other	[1]	(1.21%)	0.65%	(2.15%)
General business credit		4.31%	(2.72%)	(9.25%)
Change in Federal Tax Rate			60.98%
Valuation allowance		(155.49%)	(218.17%)	(24.57%)
Effective tax rate		(127.66%)	(150.75%)	5.23%
[1]	Other balance in 2017 and 2016 was reclassified for consistency with current year.

Note 7 - Income Taxes - Unrecog

Note 7 - Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Unrecognized tax benefits	$ 1,519	$ 707	$ 651
Decreases related to prior year tax positions	(70)
Increases related to prior year tax positions		643
Increases related to current year tax positions	114	169	56
Unrecognized tax benefits	$ 1,563	$ 1,519	$ 707

Note 8 - Net Loss Per Share - N

Note 8 - Net Loss Per Share - Net Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net income (loss)	$ (26,293)	$ (873)	$ (1,572)	$ (2,032)	$ 22,880	$ 6,188	$ 1,947	$ (1,022)	$ (30,770)	$ 29,993	$ 2,577
Weighted average shares of common stock outstanding used in computing net income (loss) per share, basic (in shares)	13,932	13,851	13,709	13,587	13,744	13,973	13,935	13,840	13,771	13,873	13,225
Dilutive effect of incremental shares and share equivalents (in shares)										855	528
Weighted average shares of common stock outstanding used in computing net income (loss) per share, diluted (in shares)	13,932	13,851	13,709	13,587	14,569	14,767	14,629	13,840	13,771	14,728	13,753
Net income (loss) per share—basic (in dollars per share)	$ (1.89)	$ (0.06)	$ (0.11)	$ (0.15)	$ 1.66	$ 0.44	$ 0.14	$ (0.07)	$ (2.23)	$ 2.16	$ 0.19
Net income (loss) per share—diluted (in dollars per share)	$ (1.89)	$ (0.06)	$ (0.11)	$ (0.15)	$ 1.57	$ 0.42	$ 0.13	$ (0.07)	$ (2.23)	$ 2.04	$ 0.19

Note 8 - Net Loss Per Share - A

Note 8 - Net Loss Per Share - Antidilutive Securities Excluded From Computation of Earnings Per Share (Details) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Antidilutive Securities (in shares)	1,272	51	244
Employee Stock Option [Member]
Antidilutive Securities (in shares)	664	42	220
Restricted Stock Units (RSUs) [Member]
Antidilutive Securities (in shares)	432	9	24
ESPP [Member]
Antidilutive Securities (in shares)	133
Performance Shares [Member]
Antidilutive Securities (in shares)	43

Note 9 - Defined Contribution_2

Note 9 - Defined Contribution Plan (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 0.4	$ 0.3	$ 0.2
Maximum [Member]
Defined Contribution Plan Maximum Percentage of Employee Voluntary Contribution		100.00%

Note 10 - Segment Information_3

Note 10 - Segment Information and Revenue by Geography and Products (Details Textual)	12 Months Ended
	Dec. 31, 2018
Number of Operating Segments	1

Note 10 - Segment Information_4

Note 10 - Segment Information and Revenue by Geography and Products - Revenue by Geographic Region (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue from Contract with Customer, Including Assessed Tax	$ 162,720	$ 151,493	$ 118,056
Products [Member]
Revenue from Contract with Customer, Including Assessed Tax	132,594	125,883	92,721
Hand Piece Refills [Member]
Revenue from Contract with Customer, Including Assessed Tax	4,162	2,435	2,498
Skincare [Member]
Revenue from Contract with Customer, Including Assessed Tax	5,778	4,342	3,809
Total Product Revenue [Member]
Revenue from Contract with Customer, Including Assessed Tax	142,535	132,660	99,028
Service [Member]
Revenue from Contract with Customer, Including Assessed Tax	20,185	18,833	19,028
UNITED STATES
Revenue from Contract with Customer, Including Assessed Tax	101,862	94,581	65,513
JAPAN
Revenue from Contract with Customer, Including Assessed Tax	17,819	17,264	14,727
Asia, Excluding Japan [Member]
Revenue from Contract with Customer, Including Assessed Tax	15,467	13,719	13,445
Europe [Member]
Revenue from Contract with Customer, Including Assessed Tax	8,875	8,317	7,539
Rest of World [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 18,696	$ 17,612	$ 16,832

Note 11 - Commitments and Con_3

Note 11 - Commitments and Contingencies (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating Leases, Rent Expense, Total	$ 2,900,000	$ 1,500,000	$ 1,600,000
Contractual Obligation, Due in Next Fiscal Year	1,700,000
Contractual Obligation, Due in Second Year	7,200,000
Estimated Litigation Liability	$ 171,000	$ 91,000

Note 11 - Commitments and Con_4

Note 11 - Commitments and Contingencies - Minimum Lease and Other Leased Assets Under Long-term Non-cancellable Operating Leases (Details) $ in Thousands	Dec. 31, 2018USD ($)
2019	$ 3,011
2020	2,939
2021	2,564
2022	2,495
2023 and thereafter	214
Future minimum rental payments	$ 11,223

Note 11 - Commitments and Con_5

Note 11 - Commitments and Contingencies - Minimum Lease Payments for Leased Vehicles Under Long-term Non-cancellable Capital Leases (Details) $ in Thousands	Dec. 31, 2018USD ($)
2019	$ 576
2020	287
2021	152
Future minimum lease payments	$ 1,015

Note 12 - Debt (Details Textual

Note 12 - Debt (Details Textual) - Wells Fargo [Member] $ in Thousands	Nov. 02, 2018USD ($)	May 30, 2018USD ($)	Dec. 31, 2019USD ($)	Sep. 30, 2019USD ($)	Jun. 30, 2019USD ($)	Dec. 31, 2018USD ($)	Sep. 30, 2018USD ($)
Revolving Line of Credit [Member]
Line of Credit Facility, Maximum Borrowing Capacity		$ 25,000
Long-term Line of Credit, Total							$ 0
Leverage Ratio, Maximum		2.5
Debt Instrument, Minimum Adjusted EBITDA		$ 10,000
Revised Revolving Line of Credit [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 15,000
Leverage Ratio, Maximum	2
Debt Instrument, Minimum Adjusted EBITDA						$ 2,500	$ 1,000
Line of Credit Facility, Additional Requestable Maximum Borrowing Capacity	$ 10,000
Debt Instrument, Debt Covenant, Minimum Unrestricted Cash Balance	$ 15,000
Revised Revolving Line of Credit [Member] | Scenario, Forecast [Member]
Debt Instrument, Minimum Adjusted EBITDA			$ 10,000	$ 6,500	$ 4,000

Note 13 - Related Parties (Deta

Note 13 - Related Parties (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	265,124	412,208	480,191
Director [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period			6,500
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Fair Value			$ 87,100
Director [Member] | Restricted Stock Units (RSUs) [Member] | Vesting Commencing on August 15, 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			3 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage			33.33%
Director [Member] | Product Development, Clinical Sales and Marketing Support Services [Member]
Related Party Transaction, Amounts of Transaction	$ 63,000	$ 196,000
T3 Advisors [Member] | Real Estate Brokerage Services [Member]
Related Party Transaction, Amounts of Transaction	$ 192,000	$ 38,000

Note 14 - Correction of Prior_2

Note 14 - Correction of Prior Period Immaterial Error (Details Textual) - USD ($)	Jan. 01, 2018	Dec. 31, 2018	Dec. 31, 2017
Retained Earnings (Accumulated Deficit), Ending Balance		$ (24,010,000)	$ 2,947,000
Accounting Standards Update 2014-09 [Member]
Cumulative Effect on Retained Earnings, before Tax	$ 5,000,000
Cumulative Effect on Retained Earnings, Tax	1,200,000
Deferred Tax Liabilities, Net, Noncurrent	1,200,000
Accounting Standards Update 2014-09 [Member] | Errors Related to Not Recording Tax Effect of ASC 606 [Member]
Deferred Tax Liabilities, Net, Noncurrent	1,200,000
Retained Earnings (Accumulated Deficit), Ending Balance	$ (1,200,000)

Note 15 - Subsequent Events (De

Note 15 - Subsequent Events (Details Textual) $ in Millions	Jan. 09, 2019USD ($)
Subsequent Event [Member] | Chief Executive Officer [Member]
Payments for Separation Agreement	$ 0.6

Supplementary Financial Data _3

Supplementary Financial Data (Unaudited) - Supplementary Financial Data (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018		Dec. 31, 2017	Dec. 31, 2016
Net revenue	$ 45,469	$ 40,573	$ 42,553	$ 34,125	$ 47,632	$ 38,173	$ 36,389	$ 29,299
Cost of revenue	26,683	18,688	20,176	16,791	20,299	15,963	15,343	13,778
Gross profit	18,786	21,885	22,377	17,334	27,333	22,210	21,046	15,521	$ 80,382		$ 86,110	$ 68,135
Sales and marketing	15,318	14,479	15,535	13,088	15,362	13,148	12,787	10,773	58,420		52,070	41,563
Research and development	3,464	3,244	4,095	3,556	3,481	3,467	2,981	2,945	14,359		12,874	11,232
General and administrative	5,494	5,160	4,902	5,439	3,947	3,379	3,548	3,216	20,995		14,090	12,943
Lease termination income						(4,000)					(4,000)
Total operating expenses	24,276	22,883	24,532	22,083	22,790	15,994	19,316	16,934	93,774		75,034	65,738
Income (loss) from operations	(5,490)	(998)	(2,155)	(4,749)	4,543	6,216	1,730	(1,413)	(13,392)		11,076	2,397
Interest and other income, net	(44)	(49)	(129)	98	138	197	276	273	(123)	[1]	884	323
Income (loss) before income taxes	(5,534)	(1,047)	(2,284)	(4,651)	4,681	6,413	2,006	(1,140)	(13,515)		11,960	2,720
Income tax provision	20,760	(174)	(712)	(2,619)	(18,199)	225	59	(118)	17,255		(18,033)	143
Net income (loss)	$ (26,293)	$ (873)	$ (1,572)	$ (2,032)	$ 22,880	$ 6,188	$ 1,947	$ (1,022)	$ (30,770)		$ 29,993	$ 2,577
Net income (loss) per share—basic (in dollars per share)	$ (1.89)	$ (0.06)	$ (0.11)	$ (0.15)	$ 1.66	$ 0.44	$ 0.14	$ (0.07)	$ (2.23)		$ 2.16	$ 0.19
Net income (loss) per share—diluted (in dollars per share)	$ (1.89)	$ (0.06)	$ (0.11)	$ (0.15)	$ 1.57	$ 0.42	$ 0.13	$ (0.07)	$ (2.23)		$ 2.04	$ 0.19
Basic (in shares)	13,932	13,851	13,709	13,587	13,744	13,973	13,935	13,840	13,771		13,873	13,225
Diluted (in shares)	13,932	13,851	13,709	13,587	14,569	14,767	14,629	13,840	13,771		14,728	13,753
[1]	Included in interest and other income, net, is the estimated interest expense for advance payment related to service contracts under the new revenue standard.

Schedule II - Valuation and Q_3

Schedule II - Valuation and Qualifying Accounts - Summary of the Deferred Tax Assets Valuation Allowance and Allowance for Doubtful Accounts Receivable (Details) - USD ($) $ in Thousands	12 Months Ended			21 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Oct. 01, 2019
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member]
Balance at beginning of year	$ 7,242	$ 31,751	$ 27,616	$ 7,242
Additions		617	6,755	22,770
Deductions		25,126	2,620	2,147
Balance at end of year		7,242	31,751	27,865
SEC Schedule, 12-09, Allowance, Loan and Lease Loss [Member]
Balance at beginning of year	9	21	4	$ 9
Additions	1,880	14	21
Deductions	632	26	4
Balance at end of year	$ 1,257	$ 9	$ 21