Proto Labs (PRLB) 10-Q30 Jul 192019 Q2 Quarterly reportFinancial data

Company Profile

Document And Entity Information

Document And Entity Information - shares	6 Months Ended
Document And Entity Information - shares	Jun. 30, 2019	Jul. 25, 2019
Document Information [Line Items]
Entity Central Index Key	0001443669
Entity Shell Company	false
Entity Registrant Name	Proto Labs Inc
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2019
Entity Small Business	false
Entity Emerging Growth Company	false
Document Quarterly Report	true
Document Transition Report	false
Document Type	10-Q
Document Period End Date	Jun. 30, 2019
Entity File Number	001-35435
Entity Incorporation, State or Country Code	MN
Entity Tax Identification Number	41-1939628
Entity Address, Address Line One	5540 Pioneer Creek Drive
Entity Address, City or Town	Maple Plain
Entity Address, State or Province	MN
Entity Address, Postal Zip Code	55359
City Area Code	763
Local Phone Number	479-3680
Title of 12(b) Security	Common Stock
Trading Symbol	PRLB
Security Exchange Name	NYSE
Entity Interactive Data Current	Yes
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		26,882,097

Consolidated Balance Sheets (Cu

Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 100,535	$ 85,046
Short-term marketable securities	35,867	46,750
Accounts receivable, net of allowance for doubtful accounts of $966 and $919 as of June 30, 2019 and December 31, 2018, respectively	62,548	59,155
Inventory	9,688	10,087
Prepaid expenses and other current assets	7,826	8,567
Income taxes receivable	2,852	5,757
Total current assets	219,316	215,362
Property and equipment, net	248,816	228,001
Goodwill	128,752	128,752
Other intangible assets, net	18,116	19,850
Long-term marketable securities	14,268	23,579
Operating lease assets	12,249	0
Other long-term assets	4,010	3,441
Total assets	645,527	618,985
Current liabilities
Accounts payable	21,230	17,411
Accrued compensation	14,068	18,130
Accrued liabilities and other	10,422	16,702
Current operating lease liabilities	3,296	0
Income taxes payable	2,417	491
Total current liabilities	51,433	52,734
Long-term operating lease liabilities	9,218	0
Long-term deferred tax liabilities	21,745	20,162
Other long-term liabilities	5,018	4,592
Total liabilities	87,414	77,488
Shareholders' equity
Preferred stock, $0.001 par value, authorized 10,000,000 shares; issued and outstanding 0 shares as of each of June 30, 2019 and December 31, 2018	0	0
Common stock, $0.001 par value, authorized 150,000,000 shares; issued and outstanding 26,882,097 and 26,984,747 shares as of June 30, 2019 and December 31, 2018, respectively	27	27
Additional paid-in capital	262,952	258,502
Retained earnings	303,628	291,460
Accumulated other comprehensive loss	(8,494)	(8,492)
Total shareholders' equity	558,113	541,497
Total liabilities and shareholders' equity	$ 645,527	$ 618,985

Consolidated Balance Sheets (_2

Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Allowance for doubtful accounts	$ 966	$ 919
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	150,000,000	150,000,000
Common stock, shares issued (in shares)	26,882,097	26,984,747
Common stock, shares outstanding (in shares)	26,882,097	26,984,747

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statements of Operations:
Revenue	$ 115,932	$ 109,652	$ 229,384	$ 217,397
Cost of revenue	55,696	50,439	110,288	100,276
Gross profit	60,236	59,213	119,096	117,121
Operating expenses
Marketing and sales	19,285	17,557	37,862	34,129
Research and development	8,169	7,032	16,182	13,697
General and administrative	13,209	12,640	26,031	25,583
Total operating expenses	40,663	37,229	80,075	73,409
Income from operations	19,573	21,984	39,021	43,712
Other income, net	1,125	808	1,338	986
Income before income taxes	20,698	22,792	40,359	44,698
Provision for income taxes	4,532	4,478	8,682	8,333
Net income	$ 16,166	$ 18,314	$ 31,677	$ 36,365
Net income per share:
Basic (in dollars per share)	$ 0.60	$ 0.68	$ 1.18	$ 1.35
Diluted (in dollars per share)	$ 0.60	$ 0.67	$ 1.17	$ 1.34
Shares used to compute net income per share:
Basic (in shares)	26,875,153	26,972,990	26,919,016	26,925,673
Diluted (in shares)	27,041,422	27,274,882	27,113,328	27,232,215
Comprehensive Income (net of tax)
Comprehensive income	$ 15,688	$ 14,796	$ 31,675	$ 35,240

Consolidated Statements of Shar

Consolidated Statements of Shareholders' 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, 2017	26,828,651
Balance at Dec. 31, 2017	$ 27	$ 241,725	$ 224,697	$ (5,234)	$ 461,215
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares)	102,895
Common shares issued on exercise of options and other, net of shares withheld for tax obligations	$ 0	2,250	0	0	2,250
Stock-based compensation expense	0	2,307	0	0	2,307
Repurchases of common stock	0	0	0	0	0
Net income	0	0	18,051	0	18,051
Foreign currency translation adjustment	$ 0	0	0	2,393	2,393
Comprehensive income					20,444
Balance (in shares) at Mar. 31, 2018	26,931,546
Balance at Mar. 31, 2018	$ 27	246,282	244,208	(2,841)	487,676
Balance (in shares) at Dec. 31, 2017	26,828,651
Balance at Dec. 31, 2017	$ 27	241,725	224,697	(5,234)	461,215
Net income					36,365
Comprehensive income					35,240
Balance (in shares) at Jun. 30, 2018	27,026,394
Balance at Jun. 30, 2018	$ 27	250,063	262,522	(6,359)	506,253
Revenue recognition transition adjustment	$ 0	0	1,460	0	1,460
Balance (in shares) at Mar. 31, 2018	26,931,546
Balance at Mar. 31, 2018	$ 27	246,282	244,208	(2,841)	487,676
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares)	94,848
Common shares issued on exercise of options and other, net of shares withheld for tax obligations	$ 0	1,054	0	0	1,054
Stock-based compensation expense	0	2,727	0	0	2,727
Repurchases of common stock	0	0	0	0	0
Net income	0	0	18,314	0	18,314
Foreign currency translation adjustment	$ 0	0	0	(3,518)	(3,518)
Comprehensive income					14,796
Balance (in shares) at Jun. 30, 2018	27,026,394
Balance at Jun. 30, 2018	$ 27	250,063	262,522	(6,359)	$ 506,253
Balance (in shares) at Dec. 31, 2018	26,984,747				26,984,747
Balance at Dec. 31, 2018	$ 27	258,502	291,460	(8,492)	$ 541,497
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares)	19,950
Common shares issued on exercise of options and other, net of shares withheld for tax obligations	$ 0	(420)	0	0	(420)
Stock-based compensation expense	$ 0	3,040	0	0	3,040
Repurchases of common stock (in shares)	(157,716)
Repurchases of common stock	$ 0	(1,511)	(15,798)	0	(17,309)
Net income	0	0	15,511	0	15,511
Foreign currency translation adjustment	$ 0	0	0	476	476
Comprehensive income					15,987
Balance (in shares) at Mar. 31, 2019	26,846,981
Balance at Mar. 31, 2019	$ 27	259,611	291,173	(8,016)	$ 542,795
Balance (in shares) at Dec. 31, 2018	26,984,747				26,984,747
Balance at Dec. 31, 2018	$ 27	258,502	291,460	(8,492)	$ 541,497
Net income					31,677
Comprehensive income					$ 31,675
Balance (in shares) at Jun. 30, 2019	26,882,097				26,882,097
Balance at Jun. 30, 2019	$ 27	262,952	303,628	(8,494)	$ 558,113
Balance (in shares) at Mar. 31, 2019	26,846,981
Balance at Mar. 31, 2019	$ 27	259,611	291,173	(8,016)	542,795
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares)	75,785
Common shares issued on exercise of options and other, net of shares withheld for tax obligations	$ 0	245	0	0	245
Stock-based compensation expense	$ 0	3,486	0	0	3,486
Repurchases of common stock (in shares)	(40,669)
Repurchases of common stock	$ 0	(390)	(3,711)	0	(4,101)
Net income	0	0	16,166	0	16,166
Foreign currency translation adjustment	$ 0	0	0	(478)	(478)
Comprehensive income					$ 15,688
Balance (in shares) at Jun. 30, 2019	26,882,097				26,882,097
Balance at Jun. 30, 2019	$ 27	$ 262,952	$ 303,628	$ (8,494)	$ 558,113

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Operating activities
Net income	$ 31,677	$ 36,365
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	14,981	12,749
Stock-based compensation expense	6,526	5,034
Deferred taxes	1,585	1,620
Gain on sale of businesses	0	(671)
Amortization of held-to-maturity securities	7	276
Other	(279)	7
Changes in operating assets and liabilities:
Accounts receivable	(3,461)	(2,648)
Inventories	392	389
Prepaid expenses and other	24	(1,059)
Income taxes	4,833	133
Accounts payable	3,848	4,408
Accrued liabilities and other	(5,245)	2,714
Net cash provided by operating activities	54,888	59,317
Investing activities
Purchases of property, equipment and other capital assets	(34,136)	(43,194)
Cash used for acquisitions, net of cash acquired	0	(90)
Proceeds from sale of business	0	284
Purchases of other assets and investments	(4,000)	0
Purchases of marketable securities	(8,983)	(17,129)
Proceeds from maturities of marketable securities	29,170	29,056
Net cash used in investing activities	(17,949)	(31,073)
Financing activities
Payments on debt	0	(5,000)
Proceeds from exercises of stock options	2,243	4,696
Purchases of shares withheld for tax obligations	(2,418)	(1,390)
Repurchases of common stock	(21,410)	0
Net cash used in financing activities	(21,585)	(1,694)
Effect of exchange rate changes on cash and cash equivalents	135	(652)
Net increase in cash and cash equivalents	15,489	25,898
Cash and cash equivalents, beginning of period	85,046	36,707
Cash and cash equivalents, end of period	$ 100,535	$ 62,605

Note 1 - Basis of Presentation

Note 1 - Basis of Presentation	6 Months Ended
Note 1 - Basis of Presentation	Jun. 30, 2019
Notes to Financial Statements
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	Note 1 The unaudited interim Consolidated Financial Statements of Proto Labs, Inc. (Protolabs, the Company, we, us or our) have been prepared in accordance with accounting principles generally accepted in the United States of America (U.S. GAAP) for interim financial information and with the instructions to Form 10 10 X. not may The preparation of the financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues, expenses, and the related disclosures at the date of the financial statements and during the reporting period. Actual results could materially differ from these estimates. For further information, refer to the audited Consolidated Financial Statements and Notes thereto included in the Company’s Annual Report on Form 10 December 31, 2018 February 22, 2019. The accompanying Consolidated Balance Sheet as of December 31, 2018 not 10 10 February 22, 2019

Note 2 - Recent Accounting Pron

Note 2 - Recent Accounting Pronouncements	6 Months Ended
Note 2 - Recent Accounting Pronouncements	Jun. 30, 2019
Notes to Financial Statements
Significant Accounting Policies [Text Block]	Note 2 Recently Adopted Accounting Pronouncements During the first quarter of 2019, the Company adopted the Financial Accounting Standards Board (FASB) Accounting Standards Update (ASU) 2016 - 02, Leases (ASC 842 ), which introduces the balance sheet recognition of lease assets and lease liabilities by lessees for those leases classified as operating leases under previous guidance. The Company has adopted the new lease standard using the new transition option issued under the amendments in ASU 2018 - 11, Leases , which allowed the Company to continue to apply the legacy guidance in Accounting Standards Codification (ASC) 840, Leases , in the comparative periods presented in the year of adoption. The Company elected the package of practical expedients permitted under the transition guidance within the new standard, which among other things, allowed the Company to carry forward the historical lease classification. The Company made an accounting policy election to keep leases with an initial term of months or less off of the balance sheet. The Company will recognize those lease payments in the Consolidated Statements of Comprehensive Income on a straight-line basis over the lease term. The impact of the adoption was an increase to the Company’s operating lease assets and liabilities on January 1, 2019 of million. Recently Issued Accounting Pronouncements In January 2017, the FASB issued ASU 2017 - 04, Intangibles – Goodwill and Other , which is intended to simplify the subsequent measurement of goodwill. This guidance will be effective for impairment tests in fiscal years beginning after December 15, 2019 and interim periods within those fiscal years with early adoption permitted. The Company does not expect the impact to be material. In June 2016, the FASB issued ASU 2016 - 13, Financial Instruments – Credit Losses , which is intended to provide financial statement users with more decision-useful information about the expected credit losses on financial instruments held by a reporting entity at each reporting date. This guidance will be effective for fiscal years beginning after December 15, 2019 and interim periods within those fiscal years with early adoption permitted. The Company is evaluating the impact of future adoption of this guidance on its consolidated financial statements, but does not expect the impact to be material.

Note 3 - Net Income Per Common

Note 3 - Net Income Per Common Share	6 Months Ended
Note 3 - Net Income Per Common Share	Jun. 30, 2019
Notes to Financial Statements
Earnings Per Share [Text Block]	Note 3 Basic net income per share is computed based on the weighted-average number of common shares outstanding. Diluted net income per share is computed based on the weighted-average number of common shares outstanding, increased by the number of additional shares that would have been outstanding had potentially dilutive common shares been issued and reduced by the number of shares the Company could have repurchased from the proceeds from issuance of the potentially dilutive shares. Potentially dilutive shares of common stock include stock options, restricted stock units and restricted stock awards granted under stock-based compensation plans and shares committed to be purchased under the employee stock purchase plan. Performance stock units are excluded from the calculation of dilutive potential common shares until the performance conditions have been satisfied. The table below sets forth the computation of basic and diluted net income per share: Three Months Ended Six Months Ended June 30, June 30, (in thousands, except share and per share amounts) 2019 2018 2019 2018 Net income $ 16,166 $ 18,314 $ 31,677 $ 36,365 Basic - weighted-average shares outstanding: 26,875,153 26,972,990 26,919,016 26,925,673 Effect of dilutive securities: Employee stock options and other 166,269 301,892 194,312 306,542 Diluted - weighted-average shares outstanding: 27,041,422 27,274,882 27,113,328 27,232,215 Net income per share: Basic $ 0.60 $ 0.68 $ 1.18 $ 1.35 Diluted $ 0.60 $ 0.67 $ 1.17 $ 1.34

Note 4 - Goodwill and Other Int

Note 4 - Goodwill and Other Intangible Assets	6 Months Ended
Note 4 - Goodwill and Other Intangible Assets	Jun. 30, 2019
Notes to Financial Statements
Goodwill and Intangible Assets Disclosure [Text Block]	Note 4 There were no changes in the carrying amount of Goodwill during the three months and six June 30, 2019. Intangible assets other than goodwill at June 30, 2019 December 31, 2018 June 30, 2019 December 31, 2018 Useful Weighted Average (in thousands) Gross Accumulated Amortization Net Gross Accumulated Amortization Net Life Useful Life Intangible assets with finite lives: Marketing assets $ 930 $ (481 ) $ 449 $ 930 $ (434 ) $ 496 10.0 4.9 Non-compete agreement 270 (214 ) 56 270 (206 ) 64 2.0 - 5.0 3.5 Trade secrets 250 (250 ) - 250 (233 ) 17 5.0 0.0 Trade names 1,080 (810 ) 270 1,080 (540 ) 540 2.0 0.5 Software technology 12,229 (1,621 ) 10,608 12,229 (997 ) 11,232 10.0 8.5 Customer relationships 10,070 (3,337 ) 6,733 10,070 (2,569 ) 7,501 6.0 - 9.0 4.3 Total intangible assets $ 24,829 $ (6,713 ) $ 18,116 $ 24,829 $ (4,979 ) $ 19,850 Amortization expense for intangible assets was $0.9 million and $0.8 million for the three June 30, 2019 2018, six June 30, 2019 2018, Estimated aggregated amortization expense based on the current carrying value of the amortizable intangible assets is as follows: (in thousands) Estimated Remaining 2019 $ 1,717 2020 2,895 2021 2,895 2022 2,895 2023 2,691 Thereafter 5,023 Total estimated amortization expense $ 18,116

Note 5 - Fair Value Measurement

Note 5 - Fair Value Measurements	6 Months Ended
Note 5 - Fair Value Measurements	Jun. 30, 2019
Notes to Financial Statements
Fair Value Disclosures [Text Block]	Note 5 ASC 820, Fair Value Measuremen 820 820 three may Level 1—Quoted Level 2—Observable 1 not Level 3—Unobservable no The Company’s cash consists of bank deposits. The Company’s cash equivalents measured at fair value consist of money market mutual funds. The Company determines the fair value of these investments using Level 1 The following table summarizes financial assets as of June 30, 2019 December 31, 2018 June 30, 2019 December 31, 2018 (in thousands) Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 Financial Assets: Cash and cash equivalents Money market mutual fund $ 8,623 $ - $ - $ 8,943 $ - $ - Total $ 8,623 $ - $ - $ 8,943 $ - $ -

Note 6 - Marketable Securities

Note 6 - Marketable Securities	6 Months Ended
Note 6 - Marketable Securities	Jun. 30, 2019
Notes to Financial Statements
Investment [Text Block]	Note 6 The Company invests in short-term and long-term agency, municipal, corporate and other debt securities. The securities are categorized as held-to-maturity and are recorded at amortized cost. Categorization as held-to-maturity is based on the Company’s ability and intent to hold these securities to maturity. The following table summarizes information regarding the Company’s short-term and long-term marketable securities as of June 30, 2019 December 31, 2018: June 30, 2019 (in thousands) Cost Unrealized Gains Unrealized Losses Fair Value U.S. municipal securities $ 6,651 $ 12 $ (1 ) $ 6,662 Corporate debt securities 26,519 105 (11 ) 26,613 U.S. government agency securities 12,997 2 (12 ) 12,987 Certificates of deposit/time deposits 1,975 16 (2 ) 1,989 U.S. treasury securities 1,993 1 - 1,994 Total marketable securities $ 50,135 $ 136 $ (26 ) $ 50,245 December 31, 2018 (in thousands) Cost Unrealized Gains Unrealized Losses Fair Value U.S. municipal securities $ 17,509 $ 1 $ (33 ) $ 17,477 Corporate debt securities 31,769 - (96 ) 31,673 U.S. government agency securities 16,843 - (88 ) 16,755 Certificates of deposit/time deposits 4,208 - (25 ) 4,183 Total marketable securities $ 70,329 $ 1 $ (242 ) $ 70,088 Fair values for the corporate debt securities are primarily determined based on quoted market prices (Level 1 2 The Company tests for other-than-temporary losses on a quarterly basis and has considered the unrealized losses indicated above to be temporary in nature. In reaching this conclusion, the Company considered the credit quality of the issuers of the debt securities as well as the Company’s intent to hold the investments to maturity and recover the full principal. Classification of marketable securities as current or non-current is based upon the security’s maturity date as of the date of these financial statements. The June 30, 2019 may may June 30, (in thousands) 2019 Due in one year or less $ 35,867 Due after one year through five years 14,268 Total marketable securities $ 50,135

Note 7 - Inventory

Note 7 - Inventory	6 Months Ended
Note 7 - Inventory	Jun. 30, 2019
Notes to Financial Statements
Inventory Disclosure [Text Block]	Note 7 Inventory consists primarily of raw materials, which are recorded at the lower of cost or market using the average-cost method, which approximates first first The Company’s inventory consisted of the following as of the dates indicated: June 30, December 31, (in thousands) 2019 2018 Raw materials $ 9,481 $ 9,560 Work in process 403 792 Total inventory 9,884 10,352 Allowance for obsolescence (196 ) (265 ) Inventory, net of allowance $ 9,688 $ 10,087

Note 8 - Leases

Note 8 - Leases	6 Months Ended
Note 8 - Leases	Jun. 30, 2019
Notes to Financial Statements
Lessee, Operating Leases [Text Block]	Note 8 The Company’s significant accounting policies are disclosed in Note 2 10 December 31, 2018. 842 The Company accounts for leases in accordance with ASC 842. January 1, 2019, 842, 840 not not January 1, 2019. not 842 not The Company has operating leases for office space, manufacturing facilities and certain company vehicles and equipment. The leases have remaining lease terms of 1 year to 10 years. Leases with an initial term of 12 not may June 30, 2019, not The Company determines if an arrangement is a lease at inception. Operating leases are included in operating lease assets, current operating lease liabilities and long-term operating lease liabilities in the Consolidated Balance Sheets and are recognized based on the present value of lease payments over the lease term at commencement date. The majority of the Company’s leases do not Supplemental balance sheet information related to leases was as follows: (in thousands) June 30, 2019 Operating lease assets $ 12,249 Current operating lease liabilities $ 3,296 Long-term operating lease liabilities 9,218 Total operating lease liabilities $ 12,514 Lease expense is recognized on a straight line basis over the lease term, with variable payments recognized in the period those payments are incurred. The components of lease expense for the periods reported were as follows: (in thousands) Three Months Ended June 30, 2019 Six Months Ended June 30, 2019 Operating lease cost $ 947 $ 2,017 Variable lease cost 266 505 Total lease cost $ 1,213 $ 2,522 Maturities of operating lease liabilities as of June 30, 2019 ( 842 (in thousands) Operating Leases Year Ending December 31, 2019 (excluding six months ended June 30, 2019) $ 2,100 2020 3,285 2021 2,517 2022 2,313 2023 1,059 After 2023 2,129 Total future minimum lease payments 13,403 Less interest (889 ) Present value of lease liabilities $ 12,514 As of June 30, 2019, not Weighted average remaining lease term and discount rate was as follows: June 30, 2019 Weighted Average Remaining Lease Term (Years) 4.96 Weighted Average Discount Rate 2.6 % Supplemental cash flow information related to leases was as follows: (in thousands) Six Months Ended June 30, 2019 Cash paid for amounts included in the measurement of operating lease liabilities: Operating cash flows for operating leases $ 2,730 Lease assets obtained in exchange for new operating lease liabilities 945

Note 9 - Stock-based Compensati

Note 9 - Stock-based Compensation	6 Months Ended
Note 9 - Stock-based Compensation	Jun. 30, 2019
Notes to Financial Statements
Share-based Payment Arrangement [Text Block]	Note 9 Under the Company’s 2012 2012 2012 may 2012 may not Employee Stock Purchase Plan The Company’s 2012 May 15 November 15, first Stock-Based Compensation Expense Stock-based compensation expense was $3.5 million and $2.7 million for the three June 30, 2019 2018, six June 30, 2019 2018, Stock Options The following table summarizes stock option activity during the six June 30, 2019: Weighted- Average Stock Options Exercise Price Options outstanding at December 31, 2018 252,616 $ 64.71 Granted 53,708 105.81 Exercised (7,640 ) 55.93 Forfeited (9,641 ) 81.88 Options outstanding at June 30, 2019 289,043 $ 72.00 Exercisable at June 30, 2019 158,686 $ 58.13 The outstanding options generally have a term of 10 years. For employees, options granted become exercisable ratably over the vesting period, which is generally a period from 4 to 5 years, beginning on the first first The weighted-average grant date fair value of options that were granted during the six June 30, 2019 The following table provides the assumptions used in the Black-Scholes pricing model valuation of options during the six June 30, 2019 2018: Six Months Ended June 30, 2019 2018 Risk-free interest rate 2.35 - 2.58% 2.52 - 3.07% Expected life (years) 6.25 6.25 Expected volatility 42.52 - 42.74% 41.95 - 42.22% Expected dividend yield 0% 0% As of June 30, 2019, Restricted Stock Restricted stock awards are share-settled awards and restrictions lapse ratably over the vesting period, which is generally a period from 4 to 5 years, beginning on the first first The following table summarizes restricted stock activity during the six June 30, 2019: Weighted- Average Grant Date Restricted Fair Value Stock Per Share Restricted stock at December 31, 2018 323,921 $ 79.85 Granted 114,467 106.41 Restrictions lapsed (95,818 ) 79.32 Forfeited (14,891 ) 83.73 Restricted stock at June 30, 2019 327,679 $ 89.11 As of June 30, 2019, Performance Stock Performance stock units (PSUs) are expressed in terms of a target number of PSUs, with anywhere between 0 percent and 150 percent of that target number capable of being earned and vesting at the end of a 3-year performance period depending on the Company’s performance in the final year of the performance period and the award recipient’s continued employment. The following table summarizes performance stock activity during the six June 30, 2019: Weighted- Average Grant Date Performance Fair Value Stock Per Share Performance stock at December 31, 2018 52,140 $ 76.54 Granted 21,434 104.99 Restrictions lapsed - - Performance change - - Forfeited (2,375 ) 105.37 Performance stock at June 30, 2019 71,199 $ 84.14 As of June 30, 2019, Employee Stock Purchase Plan The following table presents the assumptions used to estimate the fair value of the ESPP during the six June 30, 2019 2018: Six Months Ended June 30, 2019 2018 Risk-free interest rate 2.33 - 2.35% 1.48 - 2.06% Expected life (months) 6.00 6.00 Expected volatility 37.36 - 53.57% 24.49 - 31.50% Expected dividend yield 0% 0%

Note 10 - Accumulated Other Com

Note 10 - Accumulated Other Comprehensive Loss	6 Months Ended
Note 10 - Accumulated Other Comprehensive Loss	Jun. 30, 2019
Notes to Financial Statements
Disclosure of Reclassification Amount [Text Block]	Note 10 Other comprehensive income (loss) is comprised entirely of foreign currency translation adjustments. The following table presents the changes in accumulated other comprehensive income (loss) balances during the three six June 30, 2019 2018: Three Months Ended Six Months Ended June 30, June 30, (in thousands) 2019 2018 2019 2018 Foreign currency translation adjustments Balance at beginning of period $ (8,016 ) $ (2,841 ) $ (8,492 ) $ (5,234 ) Other comprehensive income (loss) before reclassifications (478 ) (3,518 ) (2 ) (1,125 ) Amounts reclassified from accumulated other comprehensive loss - - - - Net current-period other comprehensive income (loss) (478 ) (3,518 ) (2 ) (1,125 ) Balance at end of period $ (8,494 ) $ (6,359 ) $ (8,494 ) $ (6,359 )

Note 11 - Income Taxes

Note 11 - Income Taxes	6 Months Ended
Note 11 - Income Taxes	Jun. 30, 2019
Notes to Financial Statements
Income Tax Disclosure [Text Block]	Note 11 The Company is subject to income tax in multiple jurisdictions and the use of estimates is required to determine the provision for income taxes. For each of the three June 30, 2019 2018, June 30, 2019 2018, three June 30, 2019 three June 30, 2019 2018 six June 30, 2019 six June 30, 2019 2018 The effective income tax rate for the six June 30, 2019 The Company had reserves against unrecognized tax benefits totaling $4.4 million and $4.1 million as of June 30, 2019 December 31, 2018,

Note 12 - Segment Reporting

Note 12 - Segment Reporting	6 Months Ended
Note 12 - Segment Reporting	Jun. 30, 2019
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	Note 12 The Company’s reportable segments are based on the internal reporting used by the Company’s Chief Executive Officer, who is the chief operating decision maker (CODM), to assess operating performance and make decisions about the allocation of resources. The Corporate Unallocated and Japan category includes non-reportable segments, as well as research and development and general and administrative costs that the Company does not Intercompany transactions primarily relate to intercontinental activity and have been eliminated and are excluded from the reported amounts. The difference between income from operations and pre-tax income relates to foreign currency-related gains and losses and interest income on cash balances and investments, which are not Beginning in 2019, Revenue and income from operations by reportable segment for the three six June 30, 2019 2018 Three Months Ended June 30, Six Months Ended June 30, (in thousands) 2019 2018 2019 2018 Revenue: United States $ 91,149 $ 86,354 $ 178,960 $ 170,521 Europe 20,940 20,213 42,194 40,158 Japan 3,843 3,085 8,230 6,718 Total revenue $ 115,932 $ 109,652 $ 229,384 $ 217,397 Three Months Ended June 30, Six Months Ended June 30, (in thousands) 2019 2018 2019 2018 Income from Operations: United States $ 27,948 $ 29,256 $ 54,258 $ 58,099 Europe 3,756 4,009 7,977 7,371 Corporate Unallocated and Japan (12,131 ) (11,281 ) (23,214 ) (21,758 ) Total Income from Operations $ 19,573 $ 21,984 $ 39,021 $ 43,712 Total long-lived assets at June 30, 2019 December 31, 2018 June 30, December 31, (in thousands) 2019 2018 Total long-lived assets: United States $ 200,709 $ 185,979 Europe 40,027 34,577 Japan 8,080 7,445 Total Assets $ 248,816 $ 228,001

Significant Accounting Policies

Significant Accounting Policies (Policies)	6 Months Ended
Significant Accounting Policies (Policies)	Jun. 30, 2019
Accounting Policies [Abstract]
New Accounting Pronouncements, Policy [Policy Text Block]	Recently Adopted Accounting Pronouncements During the first quarter of 2019, the Company adopted the Financial Accounting Standards Board (FASB) Accounting Standards Update (ASU) 2016 - 02, Leases (ASC 842 ), which introduces the balance sheet recognition of lease assets and lease liabilities by lessees for those leases classified as operating leases under previous guidance. The Company has adopted the new lease standard using the new transition option issued under the amendments in ASU 2018 - 11, Leases , which allowed the Company to continue to apply the legacy guidance in Accounting Standards Codification (ASC) 840, Leases , in the comparative periods presented in the year of adoption. The Company elected the package of practical expedients permitted under the transition guidance within the new standard, which among other things, allowed the Company to carry forward the historical lease classification. The Company made an accounting policy election to keep leases with an initial term of months or less off of the balance sheet. The Company will recognize those lease payments in the Consolidated Statements of Comprehensive Income on a straight-line basis over the lease term. The impact of the adoption was an increase to the Company’s operating lease assets and liabilities on January 1, 2019 of million. Recently Issued Accounting Pronouncements In January 2017, the FASB issued ASU 2017 - 04, Intangibles – Goodwill and Other , which is intended to simplify the subsequent measurement of goodwill. This guidance will be effective for impairment tests in fiscal years beginning after December 15, 2019 and interim periods within those fiscal years with early adoption permitted. The Company does not expect the impact to be material. In June 2016, the FASB issued ASU 2016 - 13, Financial Instruments – Credit Losses , which is intended to provide financial statement users with more decision-useful information about the expected credit losses on financial instruments held by a reporting entity at each reporting date. This guidance will be effective for fiscal years beginning after December 15, 2019 and interim periods within those fiscal years with early adoption permitted. The Company is evaluating the impact of future adoption of this guidance on its consolidated financial statements, but does not expect the impact to be material.

Note 3 - Net Income Per Commo_2

Note 3 - Net Income Per Common Share (Tables)	6 Months Ended
Note 3 - Net Income Per Common Share (Tables)	Jun. 30, 2019
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	Three Months Ended Six Months Ended June 30, June 30, (in thousands, except share and per share amounts) 2019 2018 2019 2018 Net income $ 16,166 $ 18,314 $ 31,677 $ 36,365 Basic - weighted-average shares outstanding: 26,875,153 26,972,990 26,919,016 26,925,673 Effect of dilutive securities: Employee stock options and other 166,269 301,892 194,312 306,542 Diluted - weighted-average shares outstanding: 27,041,422 27,274,882 27,113,328 27,232,215 Net income per share: Basic $ 0.60 $ 0.68 $ 1.18 $ 1.35 Diluted $ 0.60 $ 0.67 $ 1.17 $ 1.34

Note 4 - Goodwill and Other I_2

Note 4 - Goodwill and Other Intangible Assets (Tables)	6 Months Ended
Note 4 - Goodwill and Other Intangible Assets (Tables)	Jun. 30, 2019
Notes Tables
Schedule of Finite-Lived Intangible Assets [Table Text Block]	June 30, 2019 December 31, 2018 Useful Weighted Average (in thousands) Gross Accumulated Amortization Net Gross Accumulated Amortization Net Life Useful Life Intangible assets with finite lives: Marketing assets $ 930 $ (481 ) $ 449 $ 930 $ (434 ) $ 496 10.0 4.9 Non-compete agreement 270 (214 ) 56 270 (206 ) 64 2.0 - 5.0 3.5 Trade secrets 250 (250 ) - 250 (233 ) 17 5.0 0.0 Trade names 1,080 (810 ) 270 1,080 (540 ) 540 2.0 0.5 Software technology 12,229 (1,621 ) 10,608 12,229 (997 ) 11,232 10.0 8.5 Customer relationships 10,070 (3,337 ) 6,733 10,070 (2,569 ) 7,501 6.0 - 9.0 4.3 Total intangible assets $ 24,829 $ (6,713 ) $ 18,116 $ 24,829 $ (4,979 ) $ 19,850
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	(in thousands) Estimated Remaining 2019 $ 1,717 2020 2,895 2021 2,895 2022 2,895 2023 2,691 Thereafter 5,023 Total estimated amortization expense $ 18,116

Note 5 - Fair Value Measureme_2

Note 5 - Fair Value Measurements (Tables)	6 Months Ended
Note 5 - Fair Value Measurements (Tables)	Jun. 30, 2019
Notes Tables
Fair Value, Assets Measured on Recurring Basis [Table Text Block]	June 30, 2019 December 31, 2018 (in thousands) Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 Financial Assets: Cash and cash equivalents Money market mutual fund $ 8,623 $ - $ - $ 8,943 $ - $ - Total $ 8,623 $ - $ - $ 8,943 $ - $ -

Note 6 - Marketable Securities

Note 6 - Marketable Securities (Tables)	6 Months Ended
Note 6 - Marketable Securities (Tables)	Jun. 30, 2019
Notes Tables
Debt Securities, Held-to-maturity [Table Text Block]	June 30, 2019 (in thousands) Cost Unrealized Gains Unrealized Losses Fair Value U.S. municipal securities $ 6,651 $ 12 $ (1 ) $ 6,662 Corporate debt securities 26,519 105 (11 ) 26,613 U.S. government agency securities 12,997 2 (12 ) 12,987 Certificates of deposit/time deposits 1,975 16 (2 ) 1,989 U.S. treasury securities 1,993 1 - 1,994 Total marketable securities $ 50,135 $ 136 $ (26 ) $ 50,245 December 31, 2018 (in thousands) Cost Unrealized Gains Unrealized Losses Fair Value U.S. municipal securities $ 17,509 $ 1 $ (33 ) $ 17,477 Corporate debt securities 31,769 - (96 ) 31,673 U.S. government agency securities 16,843 - (88 ) 16,755 Certificates of deposit/time deposits 4,208 - (25 ) 4,183 Total marketable securities $ 70,329 $ 1 $ (242 ) $ 70,088
Investments Classified by Contractual Maturity Date [Table Text Block]	June 30, (in thousands) 2019 Due in one year or less $ 35,867 Due after one year through five years 14,268 Total marketable securities $ 50,135

Note 7 - Inventory (Tables)

Note 7 - Inventory (Tables)	6 Months Ended
Note 7 - Inventory (Tables)	Jun. 30, 2019
Notes Tables
Schedule of Inventory, Current [Table Text Block]	June 30, December 31, (in thousands) 2019 2018 Raw materials $ 9,481 $ 9,560 Work in process 403 792 Total inventory 9,884 10,352 Allowance for obsolescence (196 ) (265 ) Inventory, net of allowance $ 9,688 $ 10,087

Note 8 - Leases (Tables)

Note 8 - Leases (Tables)	6 Months Ended
Note 8 - Leases (Tables)	Jun. 30, 2019
Notes Tables
Schedule of Operating Lease Assets and Liabilities [Table Text Block]	(in thousands) June 30, 2019 Operating lease assets $ 12,249 Current operating lease liabilities $ 3,296 Long-term operating lease liabilities 9,218 Total operating lease liabilities $ 12,514
Schedule of Lease Expense [Table Text Block]	(in thousands) Three Months Ended June 30, 2019 Six Months Ended June 30, 2019 Operating lease cost $ 947 $ 2,017 Variable lease cost 266 505 Total lease cost $ 1,213 $ 2,522
Lessee, Operating Lease, Liability, Maturity [Table Text Block]	(in thousands) Operating Leases Year Ending December 31, 2019 (excluding six months ended June 30, 2019) $ 2,100 2020 3,285 2021 2,517 2022 2,313 2023 1,059 After 2023 2,129 Total future minimum lease payments 13,403 Less interest (889 ) Present value of lease liabilities $ 12,514
Schedule of Lease Terms and Discount Rates [Table Text Block]	<tbody> <tr style="vertical-align: bottom;"> <td style="border-top: thin solid rgb(0, 0, 0);"> </td> <td style="border-top: thin solid rgb(0, 0, 0);"> </td> <td style="border-top: thin solid rgb(0, 0, 0);"> </td> <td style="border-top: thin solid rgb(0, 0, 0);"> </td> <td style="border-top: thin solid rgb(0, 0, 0);"> </td> </tr> <tr style="vertical-align: bottom;"> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt; background-color: rgb(255, 255, 255);"> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt; background-color: rgb(255, 255, 255);"> </td> <td colspan="2" style="text-align: center; font-family: "Times New Roman", Times, serif; font-size: 10pt; background-color: rgb(255, 255, 255); margin-left: 0pt; border-bottom: 1px solid rgb(0, 0, 0);"><em style="font-weight: inherit; font-style: normal;"> </em><p style="background-color:#FFFFFF;font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:center;"><b><b>June 30, 2019</b></b></p> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt; background-color: rgb(255, 255, 255); padding-bottom: 1px;"> </td> </tr> <tr style="vertical-align: bottom; background-color: rgb(204, 238, 255);"> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt; width: 82%;"> <p style="font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-top: 0pt; margin-bottom: 0pt;">Weighted Average Remaining Lease Term (Years)</p> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 15%; text-align: right; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;">4.96</td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;"> </td> </tr> <tr style="vertical-align: bottom; background-color: rgb(255, 255, 255);"> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt;"> <p style="font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-top: 0pt; margin-bottom: 0pt;">Weighted Average Discount Rate</p> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 15%; text-align: right; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;">2.6</td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;">%</td> </tr> <tr style="vertical-align: bottom;"> <td style="border-bottom: thin solid rgb(0, 0, 0);"> </td> <td style="border-bottom: thin solid rgb(0, 0, 0);"> </td> <td style="border-bottom: thin solid rgb(0, 0, 0);"> </td> <td style="border-bottom: thin solid rgb(0, 0, 0);"> </td> <td style="border-bottom: thin solid rgb(0, 0, 0);"> </td> </tr> </tbody> </table> " id="sjs-B7" xml:space="preserve"> <table border="0" cellpadding="0" cellspacing="0" class="finTable" style="margin-right: 7.5%; margin-left: 7.5%; width: 85%; font-size: 10pt; font-family: "Times New Roman", Times, serif; text-indent: 0px;"> <tbody> <tr style="vertical-align: bottom;"> <td style="border-top: thin solid rgb(0, 0, 0);"> </td> <td style="border-top: thin solid rgb(0, 0, 0);"> </td> <td style="border-top: thin solid rgb(0, 0, 0);"> </td> <td style="border-top: thin solid rgb(0, 0, 0);"> </td> <td style="border-top: thin solid rgb(0, 0, 0);"> </td> </tr> <tr style="vertical-align: bottom;"> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt; background-color: rgb(255, 255, 255);"> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt; background-color: rgb(255, 255, 255);"> </td> <td colspan="2" style="text-align: center; font-family: "Times New Roman", Times, serif; font-size: 10pt; background-color: rgb(255, 255, 255); margin-left: 0pt; border-bottom: 1px solid rgb(0, 0, 0);"><em style="font-weight: inherit; font-style: normal;"> </em><p style="background-color:#FFFFFF;font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:center;"><b><b>June 30, 2019</b></b></p> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt; background-color: rgb(255, 255, 255); padding-bottom: 1px;"> </td> </tr> <tr style="vertical-align: bottom; background-color: rgb(204, 238, 255);"> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt; width: 82%;"> <p style="font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-top: 0pt; margin-bottom: 0pt;">Weighted Average Remaining Lease Term (Years)</p> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 15%; text-align: right; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;">4.96</td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;"> </td> </tr> <tr style="vertical-align: bottom; background-color: rgb(255, 255, 255);"> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt;"> <p style="font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-top: 0pt; margin-bottom: 0pt;">Weighted Average Discount Rate</p> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 15%; text-align: right; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;">2.6</td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;">%</td> </tr> <tr style="vertical-align: bottom;"> <td style="border-bottom: thin solid rgb(0, 0, 0);"> </td> <td style="border-bottom: thin solid rgb(0, 0, 0);"> </td> <td style="border-bottom: thin solid rgb(0, 0, 0);"> </td> <td style="border-bottom: thin solid rgb(0, 0, 0);"> </td> <td style="border-bottom: thin solid rgb(0, 0, 0);"> </td> </tr> </tbody> </table>
Schedule of Lease Cash Flow Information [Table Text Block]	<tbody> <tr style="background-color: rgb(255, 255, 255); vertical-align: bottom"> <td style="border-top: thin solid rgb(0, 0, 0);"> </td> <td style="border-top: thin solid rgb(0, 0, 0);"> </td> <td style="border-top: thin solid rgb(0, 0, 0);"> </td> <td style="border-top: thin solid rgb(0, 0, 0);"> </td> <td style="border-top: thin solid rgb(0, 0, 0);"> </td> </tr> <tr style="background-color: rgb(255, 255, 255); vertical-align: bottom"> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt; background-color: rgb(255, 255, 255); width: 82%;"> <p style="background-color: rgb(255, 255, 255); font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-top: 0pt; margin-bottom: 0pt;">(in thousands)</p> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt; background-color: rgb(255, 255, 255);"> </td> <td colspan="2" style="text-align: center; font-family: "Times New Roman", Times, serif; font-size: 10pt; background-color: rgb(255, 255, 255); margin-left: 0pt; border-bottom: 1px solid rgb(0, 0, 0);"><em style="font-weight: inherit; font-style: normal;"> </em><p style="background-color:#FFFFFF;font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:center;"><b><b>Six Months Ended</b></b></p> <p style="background-color:#FFFFFF;font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:center;"><b><b>June 30, 2019</b></b></p> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt; background-color: rgb(255, 255, 255); padding-bottom: 1px;"> </td> </tr> <tr style="background-color: rgb(204, 238, 255); vertical-align: bottom"> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt;"> <p style="font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-top: 0pt; margin-bottom: 0pt;">Cash paid for amounts included in the measurement of operating lease liabilities:</p> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="text-align: left; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> </tr> <tr style="background-color: rgb(255, 255, 255); vertical-align: bottom"> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt;"> <p style="font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-top: 0pt; margin-bottom: 0pt; margin-left: 9pt;">Operating cash flows for operating leases</p> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;">$</td> <td style="width: 15%; text-align: right; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;">2,730</td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;"> </td> </tr> <tr style="background-color: rgb(204, 238, 255); vertical-align: bottom"> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt; padding: 0; margin: 0">Lease assets obtained in exchange for new operating lease liabilities</td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt; padding: 0; margin: 0"> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt; padding: 0; margin: 0"> </td> <td style="width: 15%; text-align: right; font-family: "Times New Roman", Times, serif; font-size: 10pt; padding: 0; margin: 0">945</td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt; padding: 0; margin: 0"> </td> </tr> <tr style="background-color: rgb(255, 255, 255); vertical-align: bottom"> <td style="border-bottom: thin solid rgb(0, 0, 0);"> </td> <td style="border-bottom: thin solid rgb(0, 0, 0);"> </td> <td style="border-bottom: thin solid rgb(0, 0, 0);"> </td> <td style="border-bottom: thin solid rgb(0, 0, 0);"> </td> <td style="border-bottom: thin solid rgb(0, 0, 0);"> </td> </tr> </tbody> </table> " id="sjs-B8" xml:space="preserve"> <table border="0" cellpadding="0" cellspacing="0" class="finTable" style="margin-right: 15%; width: 85%; font-size: 10pt; font-family: "Times New Roman", Times, serif; text-indent: 0px;"> <tbody> <tr style="background-color: rgb(255, 255, 255); vertical-align: bottom"> <td style="border-top: thin solid rgb(0, 0, 0);"> </td> <td style="border-top: thin solid rgb(0, 0, 0);"> </td> <td style="border-top: thin solid rgb(0, 0, 0);"> </td> <td style="border-top: thin solid rgb(0, 0, 0);"> </td> <td style="border-top: thin solid rgb(0, 0, 0);"> </td> </tr> <tr style="background-color: rgb(255, 255, 255); vertical-align: bottom"> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt; background-color: rgb(255, 255, 255); width: 82%;"> <p style="background-color: rgb(255, 255, 255); font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-top: 0pt; margin-bottom: 0pt;">(in thousands)</p> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt; background-color: rgb(255, 255, 255);"> </td> <td colspan="2" style="text-align: center; font-family: "Times New Roman", Times, serif; font-size: 10pt; background-color: rgb(255, 255, 255); margin-left: 0pt; border-bottom: 1px solid rgb(0, 0, 0);"><em style="font-weight: inherit; font-style: normal;"> </em><p style="background-color:#FFFFFF;font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:center;"><b><b>Six Months Ended</b></b></p> <p style="background-color:#FFFFFF;font-family:'Times New Roman', Times, serif;font-size:10pt;margin:0pt;text-align:center;"><b><b>June 30, 2019</b></b></p> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt; background-color: rgb(255, 255, 255); padding-bottom: 1px;"> </td> </tr> <tr style="background-color: rgb(204, 238, 255); vertical-align: bottom"> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt;"> <p style="font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-top: 0pt; margin-bottom: 0pt;">Cash paid for amounts included in the measurement of operating lease liabilities:</p> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="text-align: left; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> </tr> <tr style="background-color: rgb(255, 255, 255); vertical-align: bottom"> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt;"> <p style="font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-top: 0pt; margin-bottom: 0pt; margin-left: 9pt;">Operating cash flows for operating leases</p> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt;"> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;">$</td> <td style="width: 15%; text-align: right; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;">2,730</td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt; margin-left: 0pt;"> </td> </tr> <tr style="background-color: rgb(204, 238, 255); vertical-align: bottom"> <td style="font-family: "Times New Roman", Times, serif; font-size: 10pt; padding: 0; margin: 0">Lease assets obtained in exchange for new operating lease liabilities</td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt; padding: 0; margin: 0"> </td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt; padding: 0; margin: 0"> </td> <td style="width: 15%; text-align: right; font-family: "Times New Roman", Times, serif; font-size: 10pt; padding: 0; margin: 0">945</td> <td style="width: 1%; font-family: "Times New Roman", Times, serif; font-size: 10pt; padding: 0; margin: 0"> </td> </tr> <tr style="background-color: rgb(255, 255, 255); vertical-align: bottom"> <td style="border-bottom: thin solid rgb(0, 0, 0);"> </td> <td style="border-bottom: thin solid rgb(0, 0, 0);"> </td> <td style="border-bottom: thin solid rgb(0, 0, 0);"> </td> <td style="border-bottom: thin solid rgb(0, 0, 0);"> </td> <td style="border-bottom: thin solid rgb(0, 0, 0);"> </td> </tr> </tbody> </table>

Note 9 - Stock-based Compensa_2

Note 9 - Stock-based Compensation (Tables)	6 Months Ended
Note 9 - Stock-based Compensation (Tables)	Jun. 30, 2019
Notes Tables
Share-based Payment Arrangement, Option, Activity [Table Text Block]	Weighted- Average Stock Options Exercise Price Options outstanding at December 31, 2018 252,616 $ 64.71 Granted 53,708 105.81 Exercised (7,640 ) 55.93 Forfeited (9,641 ) 81.88 Options outstanding at June 30, 2019 289,043 $ 72.00 Exercisable at June 30, 2019 158,686 $ 58.13
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	Six Months Ended June 30, 2019 2018 Risk-free interest rate 2.35 - 2.58% 2.52 - 3.07% Expected life (years) 6.25 6.25 Expected volatility 42.52 - 42.74% 41.95 - 42.22% Expected dividend yield 0% 0%
Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]	Weighted- Average Grant Date Restricted Fair Value Stock Per Share Restricted stock at December 31, 2018 323,921 $ 79.85 Granted 114,467 106.41 Restrictions lapsed (95,818 ) 79.32 Forfeited (14,891 ) 83.73 Restricted stock at June 30, 2019 327,679 $ 89.11
Schedule of Nonvested Performance-based Units Activity [Table Text Block]	Weighted- Average Grant Date Performance Fair Value Stock Per Share Performance stock at December 31, 2018 52,140 $ 76.54 Granted 21,434 104.99 Restrictions lapsed - - Performance change - - Forfeited (2,375 ) 105.37 Performance stock at June 30, 2019 71,199 $ 84.14
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]	Six Months Ended June 30, 2019 2018 Risk-free interest rate 2.33 - 2.35% 1.48 - 2.06% Expected life (months) 6.00 6.00 Expected volatility 37.36 - 53.57% 24.49 - 31.50% Expected dividend yield 0% 0%

Note 10 - Accumulated Other C_2

Note 10 - Accumulated Other Comprehensive Loss (Tables)	6 Months Ended
Note 10 - Accumulated Other Comprehensive Loss (Tables)	Jun. 30, 2019
Notes Tables
Comprehensive Income (Loss) [Table Text Block]	Three Months Ended Six Months Ended June 30, June 30, (in thousands) 2019 2018 2019 2018 Foreign currency translation adjustments Balance at beginning of period $ (8,016 ) $ (2,841 ) $ (8,492 ) $ (5,234 ) Other comprehensive income (loss) before reclassifications (478 ) (3,518 ) (2 ) (1,125 ) Amounts reclassified from accumulated other comprehensive loss - - - - Net current-period other comprehensive income (loss) (478 ) (3,518 ) (2 ) (1,125 ) Balance at end of period $ (8,494 ) $ (6,359 ) $ (8,494 ) $ (6,359 )

Note 12 - Segment Reporting (Ta

Note 12 - Segment Reporting (Tables)	6 Months Ended
Note 12 - Segment Reporting (Tables)	Jun. 30, 2019
Notes Tables
Income from Operations by Geographic Area [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, (in thousands) 2019 2018 2019 2018 Income from Operations: United States $ 27,948 $ 29,256 $ 54,258 $ 58,099 Europe 3,756 4,009 7,977 7,371 Corporate Unallocated and Japan (12,131 ) (11,281 ) (23,214 ) (21,758 ) Total Income from Operations $ 19,573 $ 21,984 $ 39,021 $ 43,712
Long-lived Assets by Geographic Areas [Table Text Block]	June 30, December 31, (in thousands) 2019 2018 Total long-lived assets: United States $ 200,709 $ 185,979 Europe 40,027 34,577 Japan 8,080 7,445 Total Assets $ 248,816 $ 228,001
Operating Segments [Member]
Notes Tables
Revenue from External Customers by Geographic Areas [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, (in thousands) 2019 2018 2019 2018 Revenue: United States $ 91,149 $ 86,354 $ 178,960 $ 170,521 Europe 20,940 20,213 42,194 40,158 Japan 3,843 3,085 8,230 6,718 Total revenue $ 115,932 $ 109,652 $ 229,384 $ 217,397

Note 2 - Recent Accounting Pr_2

Note 2 - Recent Accounting Pronouncements (Details Textual) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Operating Lease, Liability, Total	$ 12,514
Operating Lease, Right-of-Use Asset	$ 12,249		$ 0
Accounting Standards Update 2016-02 [Member]
Operating Lease, Liability, Total		$ 13,100
Operating Lease, Right-of-Use Asset		$ 13,100

Note 3 - Net Income Per Commo_3

Note 3 - Net Income Per Common Share - Computation of Basic and Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Net income	$ 16,166	$ 15,511	$ 18,314	$ 18,051	$ 31,677	$ 36,365
Basic - weighted-average shares outstanding: (in shares)	26,875,153		26,972,990		26,919,016	26,925,673
Employee stock options and other (in shares)	166,269		301,892		194,312	306,542
Diluted - weighted-average shares outstanding: (in shares)	27,041,422		27,274,882		27,113,328	27,232,215
Basic (in dollars per share)	$ 0.60		$ 0.68		$ 1.18	$ 1.35
Diluted (in dollars per share)	$ 0.60		$ 0.67		$ 1.17	$ 1.34

Note 4 - Goodwill and Other I_3

Note 4 - Goodwill and Other Intangible Assets (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Goodwill, Period Increase (Decrease), Total	$ 0		$ 0
Amortization of Intangible Assets, Total	$ 900	$ 800	$ 1,700	$ 1,600

Note 4 - Goodwill and Other I_4

Note 4 - Goodwill and Other Intangible Assets - Intangible Assets Other Than Goodwill (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Gross	$ 24,829	$ 24,829
Accumulated Amortization	(6,713)	(4,979)
Net	18,116	19,850
Marketing-Related Intangible Assets [Member]
Gross	930	930
Accumulated Amortization	(481)	(434)
Net	$ 449	496
Useful Life (Year)	10 years
Weighted average useful life remaining (Year)	4 years 10 months 24 days
Noncompete Agreements [Member]
Gross	$ 270	270
Accumulated Amortization	(214)	(206)
Net	$ 56	64
Weighted average useful life remaining (Year)	3 years 6 months
Noncompete Agreements [Member] \| Minimum [Member]
Useful Life (Year)	2 years
Noncompete Agreements [Member] \| Maximum [Member]
Useful Life (Year)	5 years
Trade Secrets [Member]
Gross	$ 250	250
Accumulated Amortization	(250)	(233)
Net	$ 0	17
Useful Life (Year)	5 years
Weighted average useful life remaining (Year)	0 years
Trade Names [Member]
Gross	$ 1,080	1,080
Accumulated Amortization	(810)	(540)
Net	$ 270	540
Useful Life (Year)	2 years
Weighted average useful life remaining (Year)	6 months
Computer Software, Intangible Asset [Member]
Gross	$ 12,229	12,229
Accumulated Amortization	(1,621)	(997)
Net	$ 10,608	11,232
Useful Life (Year)	10 years
Weighted average useful life remaining (Year)	8 years 6 months
Customer Relationships [Member]
Gross	$ 10,070	10,070
Accumulated Amortization	(3,337)	(2,569)
Net	$ 6,733	$ 7,501
Weighted average useful life remaining (Year)	4 years 3 months 18 days
Customer Relationships [Member] \| Minimum [Member]
Useful Life (Year)	6 years
Customer Relationships [Member] \| Maximum [Member]
Useful Life (Year)	9 years

Note 4 - Goodwill and Other I_5

Note 4 - Goodwill and Other Intangible Assets - Estimated Aggregated Amortization Expense (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Remaining 2019	$ 1,717
2020	2,895
2021	2,895
2022	2,895
2023	2,691
Thereafter	5,023
Total estimated amortization expense	$ 18,116	$ 19,850

Note 5 - Fair Value Measureme_3

Note 5 - Fair Value Measurements - Fair Value of Financial Assets Measured on a Recurring Basis (Details) - Fair Value, Recurring [Member] - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Fair Value, Inputs, Level 1 [Member]
Money market mutual fund	$ 8,623	$ 8,943
Total	8,623	8,943
Fair Value, Inputs, Level 2 [Member]
Money market mutual fund	0	0
Total	0	0
Fair Value, Inputs, Level 3 [Member]
Money market mutual fund	0	0
Total	$ 0	$ 0

Note 6 - Marketable Securitie_2

Note 6 - Marketable Securities - Short-term and Long-term Marketable Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Amortized Cost	$ 50,135	$ 70,329
Unrealized Gains	136	1
Unrealized Losses	(26)	(242)
Fair Value	50,245	70,088
Bank Time Deposits [Member]
Amortized Cost	1,975	4,208
Unrealized Gains	16	0
Unrealized Losses	(2)	(25)
Fair Value	1,989	4,183
US States and Political Subdivisions Debt Securities [Member]
Amortized Cost	6,651	17,509
Unrealized Gains	12	1
Unrealized Losses	(1)	(33)
Fair Value	6,662	17,477
Corporate Debt Securities [Member]
Amortized Cost	26,519	31,769
Unrealized Gains	105	0
Unrealized Losses	(11)	(96)
Fair Value	26,613	31,673
US Government Agencies Debt Securities [Member]
Amortized Cost	12,997	16,843
Unrealized Gains	2	0
Unrealized Losses	(12)	(88)
Fair Value	12,987	$ 16,755
US Treasury Securities [Member]
Amortized Cost	1,993
Unrealized Gains	1
Unrealized Losses	0
Fair Value	$ 1,994

Note 6 - Marketable Securitie_3

Note 6 - Marketable Securities - Balance of Held-to-maturity Debt Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Due in one year or less	$ 35,867
Due after one year through five years	14,268
Total marketable securities	$ 50,135	$ 70,329

Note 7 - Inventory - Inventory

Note 7 - Inventory - Inventory (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Raw materials	$ 9,481	$ 9,560
Work in process	403	792
Total inventory	9,884	10,352
Allowance for obsolescence	(196)	(265)
Inventory, net of allowance	$ 9,688	$ 10,087

Note 8 - Leases (Details Textua

Note 8 - Leases (Details Textual) Pure in Thousands, $ in Thousands	Jun. 30, 2019USD ($)	Jan. 01, 2019USD ($)	Dec. 31, 2018USD ($)
Operating Lease, Liability, Total	$ 12,514
Operating Lease, Right-of-Use Asset	$ 12,249		$ 0
Lessee, Financial Lease, Liability, Number of Leases	0
Lessee, Operating Lease, Lease Not yet Commenced, Number of Leases	0
Minimum [Member] \| Office Space, Manufacturing Facilities, and Certain Company Vehicles and Equipment [Member]
Lessee, Operating Lease, Term of Contract	1 year
Maximum [Member] \| Office Space, Manufacturing Facilities, and Certain Company Vehicles and Equipment [Member]
Lessee, Operating Lease, Term of Contract	10 years
Accounting Standards Update 2016-02 [Member]
Operating Lease, Liability, Total		$ 13,100
Operating Lease, Right-of-Use Asset		$ 13,100

Note 8 - Leases - Balance Sheet

Note 8 - Leases - Balance Sheet Information (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Operating lease assets	$ 12,249	$ 0
Current operating lease liabilities	3,296	0
Long-term operating lease liabilities	9,218	$ 0
Total operating lease liabilities	$ 12,514

Note 8 - Leases - Lease Expense

Note 8 - Leases - Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Operating lease cost	$ 947	$ 2,017
Variable lease cost	266	505
Total lease cost	$ 1,213	$ 2,522

Note 8 - Leases - Maturities of

Note 8 - Leases - Maturities of Operating Lease Liabilities (Details) $ in Thousands	Jun. 30, 2019USD ($)
2019 (excluding six months ended June 30, 2019)	$ 2,100
2020	3,285
2021	2,517
2022	2,313
2023	1,059
After 2023	2,129
Total future minimum lease payments	13,403
Less interest	(889)
Present value of lease liabilities	$ 12,514

Note 8 - Leases - Weighted Aver

Note 8 - Leases - Weighted Average Remaining Terms and Discount Rates (Details)	Jun. 30, 2019
Weighted Average Remaining Lease Term (Years) (Year)	4 years 11 months 15 days
Weighted Average Discount Rate	2.60%

Note 8 - Leases - Cash Flow Inf

Note 8 - Leases - Cash Flow Information (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019USD ($)
Operating cash flows for operating leases	$ 2,730
Lease assets obtained in exchange for new operating lease liabilities	$ 945

Note 9 - Stock-based Compensa_3

Note 9 - Stock-based Compensation (Details Textual) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period			10 years
Share-based Payment Arrangement, Expense	$ 3.5	$ 2.7	$ 6.5	$ 5
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value			$ 47.84
ESPP [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date			15.00%
Employee Stock Purchase Plan, Offering Period			6 months
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent			85.00%
Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period			10 years
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total	4.7		$ 4.7
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition			3 years
Share-based Payment Arrangement, Option [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			4 years
Share-based Payment Arrangement, Option [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			5 years
Restricted Stock [Member]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total	27.4		$ 27.4
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition			3 years 1 month 6 days
Restricted Stock [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			4 years
Restricted Stock [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			5 years
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			3 years
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total	$ 3.3		$ 3.3
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition			2 years 1 month 6 days
Percentage of Target Number Capable of Being Earned and Vesting, Lower Limit	0.00%		0.00%
Percentage of Target Number Capable of Being Earned and Vesting, Upper Limit	150.00%		150.00%

Note 9 - Stock-based Compensa_4

Note 9 - Stock-based Compensation - Stock Option Activity (Details)	6 Months Ended
	Jun. 30, 2019$ / sharesshares
Options outstanding (in shares) \| shares	252,616
Options outstanding, weighted-average exercise price (in dollars per share) \| $ / shares	$ 64.71
Granted (in shares) \| shares	53,708
Granted, weighted-average exercise price (in dollars per share) \| $ / shares	$ 105.81
Exercised (in shares) \| shares	(7,640)
Exercised, weighted-average exercise price (in dollars per share) \| $ / shares	$ 55.93
Forfeited (in shares) \| shares	(9,641)
Forfeited, weighted-average exercise price (in dollars per share) \| $ / shares	$ 81.88
Options outstanding (in shares) \| shares	289,043
Options outstanding, weighted-average exercise price (in dollars per share) \| $ / shares	$ 72
Options exercisable (in shares) \| shares	158,686
Options exercisable, weighted-average exercise price (in dollars per share) \| $ / shares	$ 58.13

Note 9 - Stock-based Compensa_5

Note 9 - Stock-based Compensation - Assumptions Used in the Black-Scholes Option Pricing Model (Details) - Share-based Payment Arrangement, Option [Member]	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Expected life (Year)	6 years 3 months	6 years 3 months
Expected dividend yield	0.00%	0.00%
Minimum [Member]
Risk-free interest rate	2.35%	2.52%
Expected volatility	42.52%	41.95%
Maximum [Member]
Risk-free interest rate	2.58%	3.07%
Expected volatility	42.74%	42.22%

Note 9 - Stock-based Compensa_6

Note 9 - Stock-based Compensation - Restricted Stock Options (Details) - Restricted Stock [Member]	6 Months Ended
	Jun. 30, 2019$ / sharesshares
Restricted stock (in shares) \| shares	323,921
Restricted stock, weighted-average grant date fair value (in dollars per share) \| $ / shares	$ 79.85
Granted (in shares) \| shares	114,467
Granted, weighted-average grant date fair value (in dollars per share) \| $ / shares	$ 106.41
Restrictions lapsed (in shares) \| shares	(95,818)
Restrictions lapsed, weighted-average grant date fair value (in dollars per share) \| $ / shares	$ 79.32
Forfeited (in shares) \| shares	(14,891)
Forfeited, weighted-average grant date fair value (in dollars per share) \| $ / shares	$ 83.73
Restricted stock (in shares) \| shares	327,679
Restricted stock, weighted-average grant date fair value (in dollars per share) \| $ / shares	$ 89.11

Note 9 - Stock-based Compensa_7

Note 9 - Stock-based Compensation - Performance Stock (Details) - Performance Shares [Member]	6 Months Ended
	Jun. 30, 2019$ / sharesshares
Restricted stock (in shares) \| shares	52,140
Restricted stock, weighted-average grant date fair value (in dollars per share) \| $ / shares	$ 76.54
Granted (in shares) \| shares	21,434
Granted, weighted-average grant date fair value (in dollars per share) \| $ / shares	$ 104.99
Restrictions lapsed (in shares) \| shares	0
Restrictions lapsed, weighted-average grant date fair value (in dollars per share) \| $ / shares	$ 0
Performance change (in shares) \| shares	0
Performance change, weighted-average grant date fair value (in dollars per share) \| $ / shares	$ 0
Forfeited (in shares) \| shares	(2,375)
Forfeited, weighted-average grant date fair value (in dollars per share) \| $ / shares	$ 105.37
Restricted stock (in shares) \| shares	71,199
Restricted stock, weighted-average grant date fair value (in dollars per share) \| $ / shares	$ 84.14

Note 9 - Stock-based Compensa_8

Note 9 - Stock-based Compensation - Assumptions Used to Estimate the Fair Value of the ESPP (Details) - ESPP [Member]	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Expected life (Year)	6 months	6 months
Expected dividend yield	0.00%	0.00%
Minimum [Member]
Risk-free interest rate	2.33%	1.48%
Expected volatility	37.36%	24.49%
Maximum [Member]
Risk-free interest rate	2.35%	2.06%
Expected volatility	53.57%	31.50%

Note 10 - Accumulated Other C_3

Note 10 - Accumulated Other Comprehensive Loss - Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Balance	$ 542,795	$ 487,676	$ 541,497	$ 461,215
Balance	558,113	506,253	558,113	506,253
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance	(8,016)	(2,841)	(8,492)	(5,234)
Other comprehensive income (loss) before reclassifications	(478)	(3,518)	(2)	(1,125)
Amounts reclassified from accumulated other comprehensive loss	0	0	0	0
Net current-period other comprehensive income (loss)	(478)	(3,518)	(2)	(1,125)
Balance	$ (8,494)	$ (6,359)	$ (8,494)	$ (6,359)

Note 11 - Income Taxes (Details

Note 11 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Income Tax Expense (Benefit), Total	$ 4,532	$ 4,478	$ 8,682	$ 8,333
Effective Income Tax Rate Reconciliation, Percent, Total	21.90%	19.60%	21.50%	18.60%
Effective Income Tax Rate, Increase (Decrease), Percentage	2.30%		2.90%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%
Unrecognized Tax Benefits, Ending Balance	$ 4,400		$ 4,400		$ 4,100

Note 12 - Segment Reporting - R

Note 12 - Segment Reporting - Revenue From Operations by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue:
Revenue	$ 115,932	$ 109,652	$ 229,384	$ 217,397
Operating Segments [Member]
Revenue:
Revenue	115,932	109,652	229,384	217,397
Operating Segments [Member] \| United States Segment [Member]
Revenue:
Revenue	91,149	86,354	178,960	170,521
Operating Segments [Member] \| Europe Segment [Member]
Revenue:
Revenue	20,940	20,213	42,194	40,158
Operating Segments [Member] \| Japan Segment [Member]
Revenue:
Revenue	$ 3,843	$ 3,085	$ 8,230	$ 6,718

Note 12 - Segment Reporting - I

Note 12 - Segment Reporting - Income From Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income from operations	$ 19,573	$ 21,984	$ 39,021	$ 43,712
Operating Segments [Member] \| United States Segment [Member]
Income from operations	27,948	29,256	54,258	58,099
Operating Segments [Member] \| Europe Segment [Member]
Income from operations	3,756	4,009	7,977	7,371
Operating Segments [Member] \| Corporate Unallocated and Japan Segment[Member]
Income from operations	(12,131)	(11,281)	(23,214)	(21,758)
Corporate and Reconciling Items [Member]
Income from operations	$ 19,573	$ 21,984	$ 39,021	$ 43,712

Note 12 - Segment Reporting - L

Note 12 - Segment Reporting - Long-lived Assets by Geographic Region (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Long-lived assets	$ 248,816	$ 228,001
Operating Segments [Member] \| United States Segment [Member]
Long-lived assets	200,709	185,979
Operating Segments [Member] \| Europe Segment [Member]
Long-lived assets	40,027	34,577
Operating Segments [Member] \| Japan Segment [Member]
Long-lived assets	$ 8,080	$ 7,445