Proto Labs (PRLB) 10-Q 3 Nov 20 2020 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2020	Oct. 29, 2020
Document Information [Line Items]
Entity Central Index Key	0001443669
Entity Registrant Name	Proto Labs Inc
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2020
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2020
Document Transition Report	false
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, Par Value $0.001 Per Share
Trading Symbol	PRLB
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		26,753,545

Consolidated Balance Sheets (Cu

Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 118,254	$ 125,225
Short-term marketable securities	30,993	35,437
Accounts receivable, net of allowance for doubtful accounts of $1,854 and $952 as of September 30, 2020 and December 31, 2019, respectively	61,250	57,450
Inventory	10,402	10,075
Income taxes receivable	16	0
Prepaid expenses and other current assets	10,198	8,232
Total current assets	231,113	236,419
Property and equipment, net	281,895	263,712
Goodwill	128,752	128,752
Other intangible assets, net	15,107	17,369
Long-term marketable securities	51,369	12,960
Operating lease assets	10,485	11,425
Finance lease assets	2,087	0
Other long-term assets	5,318	3,030
Total assets	726,126	673,667
Current liabilities
Accounts payable	15,452	16,804
Accrued compensation	13,539	15,058
Accrued liabilities and other	19,047	11,057
Current operating lease liabilities	3,330	3,340
Current finance lease liabilities	325	0
Income taxes payable	0	1,322
Total current liabilities	51,693	47,581
Long-term operating lease liabilities	8,003	8,565
Long-term finance lease liabilities	1,758	0
Long-term deferred tax liabilities	32,849	26,283
Other long-term liabilities	6,002	5,448
Total liabilities	100,305	87,877
Shareholders' equity
Preferred stock, $0.001 par value, authorized 10,000,000 shares; issued and outstanding 0 shares as of each of September 30, 2020 and December 31, 2019	0	0
Common stock, $0.001 par value, authorized 150,000,000 shares; issued and outstanding 26,753,545 and 26,786,459 shares as of September 30, 2020 and December 31, 2019, respectively	27	27
Additional paid-in capital	278,996	268,059
Retained earnings	353,322	324,722
Accumulated other comprehensive loss	(6,524)	(7,018)
Total shareholders' equity	625,821	585,790
Total liabilities and shareholders' equity	$ 726,126	$ 673,667

Consolidated Balance Sheets (_2

Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Allowance for doubtful accounts	$ 1,854	$ 952
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
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)	26,753,545	26,786,459
Common stock, shares outstanding (in shares)	26,753,545	26,786,459

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statements of Operations:
Revenue	$ 107,504	$ 117,455	$ 329,187	$ 346,839
Cost of revenue	52,861	57,839	163,988	168,127
Gross profit	54,643	59,616	165,199	178,712
Operating expenses
Marketing and sales	16,705	17,604	51,821	55,466
Research and development	7,915	8,359	25,550	24,541
General and administrative	12,354	12,380	38,983	38,411
Total operating expenses	36,974	38,343	116,354	118,418
Income from operations	17,669	21,273	48,845	60,294
Other income, net	728	228	2,549	1,566
Income before income taxes	18,397	21,501	51,394	61,860
Provision for income taxes	3,700	4,709	10,106	13,391
Net income	$ 14,697	$ 16,792	$ 41,288	$ 48,469
Net income per share:
Basic (in dollars per share)	$ 0.55	$ 0.63	$ 1.54	$ 1.80
Diluted (in dollars per share)	$ 0.55	$ 0.62	$ 1.54	$ 1.79
Shares used to compute net income per share:
Basic (in shares)	26,736,709	26,846,030	26,724,715	26,894,420
Diluted (in shares)	26,886,433	27,005,341	26,861,647	27,072,873
Comprehensive Income (net of tax)
Comprehensive income	$ 17,807	$ 14,642	$ 41,782	$ 46,317

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity (Unaudited) - 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, 2018	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
Other comprehensive income
Foreign currency translation adjustment	$ 0	0	0	476	476
Comprehensive income					15,987
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
Balance (in shares) at Dec. 31, 2018	26,984,747
Balance at Dec. 31, 2018	$ 27	258,502	291,460	(8,492)	541,497
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
Balance at Dec. 31, 2018	$ 27	258,502	291,460	(8,492)	541,497
Net income					48,469
Other comprehensive income
Comprehensive income					46,317
Net income					48,469
Balance (in shares) at Dec. 31, 2018	26,984,747
Balance at Dec. 31, 2018	$ 27	258,502	291,460	(8,492)	541,497
Balance (in shares) at Sep. 30, 2019	26,759,109
Balance at Sep. 30, 2019	$ 27	265,178	309,536	(10,644)	564,097
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
Other comprehensive income
Foreign currency translation adjustment		0	0	(478)	(478)
Comprehensive income					15,688
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
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 Jun. 30, 2019	26,882,097
Balance at Jun. 30, 2019	$ 27	262,952	303,628	(8,494)	558,113
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares)	5,089
Common shares issued on exercise of options and other, net of shares withheld for tax obligations	$ 0	241	0	0	241
Stock-based compensation expense	$ 0	3,212	0	0	3,212
Repurchases of common stock (in shares)	(128,077)
Repurchases of common stock	$ 0	(1,227)	(10,884)	0	(12,111)
Net income	0	0	16,792	0	16,792
Other comprehensive income
Foreign currency translation adjustment		0	0	(2,150)	(2,150)
Comprehensive income					14,642
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares)	5,089
Common shares issued on exercise of options and other, net of shares withheld for tax obligations	$ 0	241	0	0	241
Stock-based compensation expense	$ 0	3,212	0	0	3,212
Repurchases of common stock (in shares)	(128,077)
Repurchases of common stock	$ 0	(1,227)	(10,884)	0	(12,111)
Net income	$ 0	0	16,792	0	16,792
Balance (in shares) at Jun. 30, 2019	26,882,097
Balance at Jun. 30, 2019	$ 27	262,952	303,628	(8,494)	558,113
Balance (in shares) at Sep. 30, 2019	26,759,109
Balance at Sep. 30, 2019	$ 27	265,178	309,536	(10,644)	$ 564,097
Balance (in shares) at Dec. 31, 2019	26,786,459				26,786,459
Balance at Dec. 31, 2019	$ 27	268,059	324,722	(7,018)	$ 585,790
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares)	23,525
Common shares issued on exercise of options and other, net of shares withheld for tax obligations	$ 0	(902)	0	0	(902)
Stock-based compensation expense	$ 0	3,033	0	0	3,033
Repurchases of common stock (in shares)	(161,460)
Repurchases of common stock	$ 0	(1,616)	(9,569)	0	(11,185)
Net income	0	0	13,984	0	13,984
Other comprehensive income
Foreign currency translation adjustment	$ 0	0	0	(2,980)	(2,980)
Comprehensive income					11,004
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares)	23,525
Common shares issued on exercise of options and other, net of shares withheld for tax obligations	$ 0	(902)	0	0	(902)
Stock-based compensation expense	$ 0	3,033	0	0	3,033
Repurchases of common stock (in shares)	(161,460)
Repurchases of common stock	$ 0	(1,616)	(9,569)	0	(11,185)
Net income	$ 0	0	13,984	0	$ 13,984
Balance (in shares) at Dec. 31, 2019	26,786,459				26,786,459
Balance at Dec. 31, 2019	$ 27	268,059	324,722	(7,018)	$ 585,790
Balance (in shares) at Mar. 31, 2020	26,648,524
Balance at Mar. 31, 2020	$ 27	268,574	329,137	(9,998)	$ 587,740
Balance (in shares) at Dec. 31, 2019	26,786,459				26,786,459
Balance at Dec. 31, 2019	$ 27	268,059	324,722	(7,018)	$ 585,790
Net income					41,288
Other comprehensive income
Comprehensive income					41,782
Net income					$ 41,288
Balance (in shares) at Dec. 31, 2019	26,786,459				26,786,459
Balance at Dec. 31, 2019	$ 27	268,059	324,722	(7,018)	$ 585,790
Balance (in shares) at Sep. 30, 2020	26,753,545				26,753,545
Balance at Sep. 30, 2020	$ 27	278,996	353,322	(6,524)	$ 625,821
Balance (in shares) at Mar. 31, 2020	26,648,524
Balance at Mar. 31, 2020	$ 27	268,574	329,137	(9,998)	587,740
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares)	96,186
Common shares issued on exercise of options and other, net of shares withheld for tax obligations	$ 0	400	0	0	400
Stock-based compensation expense	$ 0	3,639	0	0	3,639
Repurchases of common stock (in shares)	(38,154)
Repurchases of common stock	$ 0	(382)	(3,119)	0	(3,501)
Net income	0	0	12,607	0	12,607
Other comprehensive income
Foreign currency translation adjustment		0	0	364	364
Comprehensive income					12,971
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares)	96,186
Common shares issued on exercise of options and other, net of shares withheld for tax obligations	$ 0	400	0	0	400
Stock-based compensation expense	$ 0	3,639	0	0	3,639
Repurchases of common stock (in shares)	(38,154)
Repurchases of common stock	$ 0	(382)	(3,119)	0	(3,501)
Net income	$ 0	0	12,607	0	12,607
Balance (in shares) at Mar. 31, 2020	26,648,524
Balance at Mar. 31, 2020	$ 27	268,574	329,137	(9,998)	587,740
Balance (in shares) at Jun. 30, 2020	26,706,556
Balance at Jun. 30, 2020	$ 27	272,231	338,625	(9,634)	601,249
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares)	46,989
Common shares issued on exercise of options and other, net of shares withheld for tax obligations	$ 0	2,820			2,820
Stock-based compensation expense	$ 0	3,945	0	0	3,945
Repurchases of common stock (in shares)	0
Repurchases of common stock	$ 0	0	0	0	0
Net income	0	0	14,697	0	14,697
Other comprehensive income
Foreign currency translation adjustment	$ 0	0	0	3,110	3,110
Comprehensive income					17,807
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares)	46,989
Common shares issued on exercise of options and other, net of shares withheld for tax obligations	$ 0	2,820			2,820
Stock-based compensation expense	$ 0	3,945	0	0	3,945
Repurchases of common stock (in shares)	0
Repurchases of common stock	$ 0	0	0	0	0
Net income	$ 0	0	14,697	0	14,697
Balance (in shares) at Jun. 30, 2020	26,706,556
Balance at Jun. 30, 2020	$ 27	272,231	338,625	(9,634)	$ 601,249
Balance (in shares) at Sep. 30, 2020	26,753,545				26,753,545
Balance at Sep. 30, 2020	$ 27	$ 278,996	$ 353,322	$ (6,524)	$ 625,821

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Operating activities
Net income	$ 41,288	$ 48,469
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	23,891	22,658
Stock-based compensation expense	10,617	9,738
Deferred taxes	6,578	1,599
Amortization of held-to-maturity securities	202	(5)
Other	(865)	(133)
Changes in operating assets and liabilities:
Accounts receivable	(3,812)	(5,387)
Inventories	(316)	551
Prepaid expenses and other	(1,008)	(162)
Income taxes	(1,325)	9,165
Accounts payable	(1,257)	1,479
Accrued liabilities and other	8,382	(4,193)
Net cash provided by operating activities	82,375	83,779
Investing activities
Purchases of property, equipment and other capital assets	(40,489)	(46,151)
Purchases of other assets and investments	(3,000)	(4,000)
Purchases of marketable securities	(90,596)	(17,443)
Proceeds from maturities of marketable securities	56,428	54,352
Net cash used in investing activities	(77,657)	(13,242)
Financing activities
Proceeds from exercises of stock options	5,674	2,486
Purchases of shares withheld for tax obligations	(3,367)	(2,420)
Repurchases of common stock	(14,686)	(33,521)
Net cash used in financing activities	(12,379)	(33,455)
Effect of exchange rate changes on cash and cash equivalents	690	(560)
Net (decrease) increase in cash and cash equivalents	(6,971)	36,522
Cash and cash equivalents, beginning of period	125,225	85,046
Cash and cash equivalents, end of period	$ 118,254	$ 121,568

Note 1 - Basis of Presentation

Note 1 - Basis of Presentation	9 Months Ended
	Sep. 30, 2020
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, 2019 February 26, 2020. The accompanying Consolidated Balance Sheet as of December 31, 2019 not 10 10 February 26, 2020

Note 2 - Recent Accounting Pron

Note 2 - Recent Accounting Pronouncements	9 Months Ended
	Sep. 30, 2020
Notes to Financial Statements
Significant Accounting Policies [Text Block]	Note 2 Recently Adopted Accounting Pronouncements During the first 2020, 2016 13, Financial Instruments – Credit Losses no During the fourth 2019, 2017 04, no

Note 3 - Net Income Per Common

Note 3 - Net Income Per Common Share	9 Months Ended
	Sep. 30, 2020
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 Nine Months Ended September 30, September 30, (in thousands, except share and per share amounts) 2020 2019 2020 2019 Net income $ 14,697 $ 16,792 $ 41,288 $ 48,469 Basic - weighted-average shares outstanding: 26,736,709 26,846,030 26,724,715 26,894,420 Effect of dilutive securities: Employee stock options and other 149,724 159,311 136,932 178,453 Diluted - weighted-average shares outstanding: 26,886,433 27,005,341 26,861,647 27,072,873 Net income per share: Basic $ 0.55 $ 0.63 $ 1.54 $ 1.80 Diluted $ 0.55 $ 0.62 $ 1.54 $ 1.79

Note 4 - Goodwill and Other Int

Note 4 - Goodwill and Other Intangible Assets	9 Months Ended
	Sep. 30, 2020
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 nine September 30, 2020 Intangible assets other than goodwill at September 30, 2020 December 31, 2019 September 30, 2020 December 31, 2019 Useful Weighted Average (in thousands) Gross Accumulated Amortization Net Gross Accumulated Amortization Net Life (in years) Useful Life Remaining (in years) Intangible assets with finite lives: Marketing assets $ 930 $ (597 ) $ 333 $ 930 $ (527 ) $ 403 10.0 3.5 Non-compete agreement 270 (234 ) 36 270 (222 ) 48 2.0 - 5.0 2.3 Software technology 13,229 (3,302 ) 9,927 13,229 (2,275 ) 10,954 10.0 7.3 Customer relationships 10,070 (5,259 ) 4,811 10,070 (4,106 ) 5,964 6.0 - 9.0 3.1 Total intangible assets $ 24,499 $ (9,392 ) $ 15,107 $ 24,499 $ (7,130 ) $ 17,369 Amortization expense for intangible assets was $0.8 million and $0.9 million for the three September 30, 2020 2019 nine September, 2020 2019, Estimated aggregated amortization expense based on the current carrying value of the amortizable intangible assets is as follows: (in thousands) Estimated Amortization Expense Remaining 2020 $ 754 2021 3,016 2022 3,016 2023 2,813 2024 1,400 Thereafter 4,108 Total estimated amortization expense $ 15,107

Note 5 - Fair Value Measurement

Note 5 - Fair Value Measurements	9 Months Ended
	Sep. 30, 2020
Notes to Financial Statements
Fair Value Disclosures [Text Block]	Note 5 Accounting Standards Codification (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 September 30, 2020 December 31, 2019 September 30, 2020 December 31, 2019 (in thousands) Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 Financial Assets: Cash and cash equivalents Money market mutual fund $ 66,374 $ - $ - $ 68,962 $ - $ - Total $ 66,374 $ - $ - $ 68,962 $ - $ -

Note 6 - Marketable Securities

Note 6 - Marketable Securities	9 Months Ended
	Sep. 30, 2020
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, net of an allowance for credit losses. 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 September 30, 2020 December 31, 2019 September 30, 2020 (in thousands) Cost Unrealized Gains Unrealized Losses Fair Value U.S. municipal securities $ 17,795 $ 68 $ - $ 17,863 Corporate debt securities 38,876 283 (25 ) 39,134 U.S. government agency securities 19,003 9 (15 ) 18,997 Certificates of deposit/time deposits 5,189 105 - 5,294 Commercial paper 1,499 - - 1,499 Total marketable securities $ 82,362 $ 465 $ (40 ) $ 82,787 December 31, 2019 (in thousands) Cost Unrealized Gains Unrealized Losses Fair Value U.S. municipal securities $ 10,204 $ 9 $ (3 ) $ 10,210 Corporate debt securities 26,944 80 (12 ) 27,012 U.S. government agency securities 6,274 1 (7 ) 6,268 Certificates of deposit/time deposits 1,484 22 - 1,506 Commercial paper 3,491 - - 3,491 Total marketable securities $ 48,397 $ 112 $ (22 ) $ 48,487 Fair values for the corporate debt securities are primarily determined based on quoted market prices (Level 1 2 During the first 2020, 2016 13, Financial Instruments – Credit Losses. no 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 September 30, 2020 may may September 30, (in thousands) 2020 Due in one year or less $ 30,993 Due after one year through five years 51,369 Total marketable securities $ 82,362

Note 7 - Inventory

Note 7 - Inventory	9 Months Ended
	Sep. 30, 2020
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: September 30, December 31, (in thousands) 2020 2019 Raw materials $ 10,650 $ 9,818 Work in process 16 501 Total inventory 10,666 10,319 Allowance for obsolescence (264 ) (244 ) Inventory, net of allowance $ 10,402 $ 10,075

Note 8 - Stock-based Compensati

Note 8 - Stock-based Compensation	9 Months Ended
	Sep. 30, 2020
Notes to Financial Statements
Share-based Payment Arrangement [Text Block]	Note 8 Under the Company’s 2012 2012 2012 ten may 2012 may not Employee Stock Purchase Plan The Company’s 2012 six May 15 November 15, first Stock-Based Compensation Expense Stock-based compensation expense was $3.9 million and $3.2 million for the three September 30, 2020 2019 nine September 30, 2020 2019, Stock Options The following table summarizes stock option activity during the nine September 30, 2020 Weighted- Average Stock Options Exercise Price Options outstanding at December 31, 2019 276,266 $ 72.38 Granted 60,065 105.79 Exercised (64,932 ) 57.24 Forfeited (37,842 ) 67.92 Options outstanding at September 30, 2020 233,557 $ 85.89 Exercisable at September 30, 2020 135,837 $ 98.38 The outstanding options generally have a term of ten four five first first The weighted-average grant date fair value of options that were granted during the nine September 30, 2020 The following table provides the assumptions used in the Black-Scholes pricing model valuation of options during the nine September 30, 2020 2019 Nine Months Ended September 30, 2020 2019 Risk-free interest rate 0.50 - 1.47% 2.35 - 2.58% Expected life (years) 6.25 6.25 Expected volatility 42.40 - 43.83% 42.52 - 42.74% Expected dividend yield 0% 0% As of September 30, 2020 Restricted Stock Restricted stock awards are share-settled awards and restrictions lapse ratably over the vesting period, which is generally a period from four five first first The following table summarizes restricted stock activity during the nine September 30, 2020 Weighted- Average Grant Date Restricted Fair Value Stock Per Share Restricted stock at December 31, 2019 314,973 $ 89.55 Granted 108,179 117.76 Restrictions lapsed (100,596 ) 84.57 Forfeited (12,221 ) 92.61 Restricted stock at September 30, 2020 310,335 $ 98.84 As of September 30, 2020 Performance Stock Performance stock units (PSUs) are expressed in terms of a target number of PSUs, with anywhere between 0 three 2017 2019 2020 The following table summarizes performance stock activity during the nine September 30, 2020 Weighted- Average Grant Date Performance Fair Value Stock Per Share Performance stock at December 31, 2019 9,383 $ 58.35 Granted 19,956 118.66 Restrictions lapsed (7,113 ) 58.35 Performance change - - Forfeited (2,270 ) 58.35 Performance stock at September 30, 2020 19,956 $ 118.66 The following table provides the assumptions used in the Monte Carlo pricing model valuation of PSUs during the nine September 30, 2020 Nine Months Ended September 30, 2020 Risk-free interest rate 1.41% Expected life (years) 2.88 Expected volatility 38.70% Expected dividend yield 0% As of September 30, 2020 Employee Stock Purchase Plan The following table presents the assumptions used to estimate the fair value of the ESPP during the nine September 30, 2020 2019 Nine Months Ended September 30, 2020 2019 Risk-free interest rate 0.17 - 1.59% 2.33 - 2.35% Expected life (months) 6.00 6.00 Expected volatility 42.63 - 59.99% 37.36 - 53.57% Expected dividend yield 0% 0%

Note 9 - Accumulated Other Comp

Note 9 - Accumulated Other Comprehensive Loss	9 Months Ended
	Sep. 30, 2020
Notes to Financial Statements
Disclosure of Reclassification Amount [Text Block]	Note 9 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 nine September 30, 2020 2019 Three Months Ended Nine Months Ended September 30, September 30, (in thousands) 2020 2019 2020 2019 Foreign currency translation adjustments Balance at beginning of period $ (9,634 ) $ (8,494 ) $ (7,018 ) $ (8,492 ) Other comprehensive income (loss) before reclassifications 3,110 (2,150 ) 494 (2,152 ) Amounts reclassified from accumulated other comprehensive loss - - - - Net current-period other comprehensive income (loss) 3,110 (2,150 ) 494 (2,152 ) Balance at end of period $ (6,524 ) $ (10,644 ) $ (6,524 ) $ (10,644 )

Note 10 - Income Taxes

Note 10 - Income Taxes	9 Months Ended
	Sep. 30, 2020
Notes to Financial Statements
Income Tax Disclosure [Text Block]	Note 10 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 the three September 30, 2020 2019 nine September 30, 2020 2019 three September 30, 2020 three September 30, 2020 2019 nine September 30, 2020 nine September 30, 2020 2019 The effective income tax rate for the nine September 30, 2020 The Company had unrecognized tax benefits totaling $4.9 million as of September 30, 2020 December 31, 2019 The Coronavirus Aid, Relief, and Economic Security (CARES) Act was signed into law on March 27, 2020. 2017 2018 2019. September 30, 2020 December 31, 2020. 2021.

Note 11 - Segment Reporting

Note 11 - Segment Reporting	9 Months Ended
	Sep. 30, 2020
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	Note 11 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 Revenue and income from operations by reportable segment for the three nine September 30, 2020 2019 Three Months Ended September 30, Nine Months Ended September 30, (in thousands) 2020 2019 2020 2019 Revenue: United States $ 85,608 $ 92,916 $ 262,507 $ 271,877 Europe 18,897 20,721 56,413 62,915 Japan 2,999 3,818 10,267 12,047 Total revenue $ 107,504 $ 117,455 $ 329,187 $ 346,839 Three Months Ended September 30, Nine Months Ended September 30, (in thousands) 2020 2019 2020 2019 Income from Operations: United States $ 25,164 $ 28,109 $ 74,602 $ 82,367 Europe 3,764 4,045 10,389 12,022 Corporate Unallocated and Japan (11,259 ) (10,881 ) (36,146 ) (34,095 ) Total Income from Operations $ 17,669 $ 21,273 $ 48,845 $ 60,294 Total long-lived assets at September 30, 2020 December 31, 2019 September 30, December 31, (in thousands) 2020 2019 Total long-lived assets: United States $ 219,425 $ 210,171 Europe 54,628 45,019 Japan 7,842 8,522 Total Assets $ 281,895 $ 263,712 Revenue by product line for the three nine September 30, 2020 2019 Three Months Ended September 30, Nine Months Ended September 30, (in thousands) 2020 2019 2020 2019 Revenue: Injection Molding $ 53,257 $ 55,167 $ 165,927 $ 165,935 CNC Machining 33,115 40,219 99,760 116,979 3D Printing 16,294 15,898 46,478 45,644 Sheet Metal 3,988 5,280 14,306 15,777 Other Revenue 850 891 2,716 2,504 Total revenue $ 107,504 $ 117,455 $ 329,187 $ 346,839

Note 3 - Net Income Per Commo_2

Note 3 - Net Income Per Common Share (Tables)	9 Months Ended
	Sep. 30, 2020
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	Three Months Ended Nine Months Ended September 30, September 30, (in thousands, except share and per share amounts) 2020 2019 2020 2019 Net income $ 14,697 $ 16,792 $ 41,288 $ 48,469 Basic - weighted-average shares outstanding: 26,736,709 26,846,030 26,724,715 26,894,420 Effect of dilutive securities: Employee stock options and other 149,724 159,311 136,932 178,453 Diluted - weighted-average shares outstanding: 26,886,433 27,005,341 26,861,647 27,072,873 Net income per share: Basic $ 0.55 $ 0.63 $ 1.54 $ 1.80 Diluted $ 0.55 $ 0.62 $ 1.54 $ 1.79

Note 4 - Goodwill and Other I_2

Note 4 - Goodwill and Other Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2020
Notes Tables
Schedule of Finite-Lived Intangible Assets [Table Text Block]	September 30, 2020 December 31, 2019 Useful Weighted Average (in thousands) Gross Accumulated Amortization Net Gross Accumulated Amortization Net Life (in years) Useful Life Remaining (in years) Intangible assets with finite lives: Marketing assets $ 930 $ (597 ) $ 333 $ 930 $ (527 ) $ 403 10.0 3.5 Non-compete agreement 270 (234 ) 36 270 (222 ) 48 2.0 - 5.0 2.3 Software technology 13,229 (3,302 ) 9,927 13,229 (2,275 ) 10,954 10.0 7.3 Customer relationships 10,070 (5,259 ) 4,811 10,070 (4,106 ) 5,964 6.0 - 9.0 3.1 Total intangible assets $ 24,499 $ (9,392 ) $ 15,107 $ 24,499 $ (7,130 ) $ 17,369
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	(in thousands) Estimated Amortization Expense Remaining 2020 $ 754 2021 3,016 2022 3,016 2023 2,813 2024 1,400 Thereafter 4,108 Total estimated amortization expense $ 15,107

Note 5 - Fair Value Measureme_2

Note 5 - Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2020
Notes Tables
Fair Value, Assets Measured on Recurring Basis [Table Text Block]	September 30, 2020 December 31, 2019 (in thousands) Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 Financial Assets: Cash and cash equivalents Money market mutual fund $ 66,374 $ - $ - $ 68,962 $ - $ - Total $ 66,374 $ - $ - $ 68,962 $ - $ -

Note 6 - Marketable Securities

Note 6 - Marketable Securities (Tables)	9 Months Ended
	Sep. 30, 2020
Notes Tables
Debt Securities, Held-to-maturity [Table Text Block]	September 30, 2020 (in thousands) Cost Unrealized Gains Unrealized Losses Fair Value U.S. municipal securities $ 17,795 $ 68 $ - $ 17,863 Corporate debt securities 38,876 283 (25 ) 39,134 U.S. government agency securities 19,003 9 (15 ) 18,997 Certificates of deposit/time deposits 5,189 105 - 5,294 Commercial paper 1,499 - - 1,499 Total marketable securities $ 82,362 $ 465 $ (40 ) $ 82,787 December 31, 2019 (in thousands) Cost Unrealized Gains Unrealized Losses Fair Value U.S. municipal securities $ 10,204 $ 9 $ (3 ) $ 10,210 Corporate debt securities 26,944 80 (12 ) 27,012 U.S. government agency securities 6,274 1 (7 ) 6,268 Certificates of deposit/time deposits 1,484 22 - 1,506 Commercial paper 3,491 - - 3,491 Total marketable securities $ 48,397 $ 112 $ (22 ) $ 48,487
Investments Classified by Contractual Maturity Date [Table Text Block]	September 30, (in thousands) 2020 Due in one year or less $ 30,993 Due after one year through five years 51,369 Total marketable securities $ 82,362

Note 7 - Inventory (Tables)

Note 7 - Inventory (Tables)	9 Months Ended
	Sep. 30, 2020
Notes Tables
Schedule of Inventory, Current [Table Text Block]	September 30, December 31, (in thousands) 2020 2019 Raw materials $ 10,650 $ 9,818 Work in process 16 501 Total inventory 10,666 10,319 Allowance for obsolescence (264 ) (244 ) Inventory, net of allowance $ 10,402 $ 10,075

Note 8 - Stock-based Compensa_2

Note 8 - Stock-based Compensation (Tables)	9 Months Ended
	Sep. 30, 2020
Notes Tables
Share-based Payment Arrangement, Option, Activity [Table Text Block]	Weighted- Average Stock Options Exercise Price Options outstanding at December 31, 2019 276,266 $ 72.38 Granted 60,065 105.79 Exercised (64,932 ) 57.24 Forfeited (37,842 ) 67.92 Options outstanding at September 30, 2020 233,557 $ 85.89 Exercisable at September 30, 2020 135,837 $ 98.38
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	Nine Months Ended September 30, 2020 2019 Risk-free interest rate 0.50 - 1.47% 2.35 - 2.58% Expected life (years) 6.25 6.25 Expected volatility 42.40 - 43.83% 42.52 - 42.74% 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, 2019 314,973 $ 89.55 Granted 108,179 117.76 Restrictions lapsed (100,596 ) 84.57 Forfeited (12,221 ) 92.61 Restricted stock at September 30, 2020 310,335 $ 98.84
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, 2019 9,383 $ 58.35 Granted 19,956 118.66 Restrictions lapsed (7,113 ) 58.35 Performance change - - Forfeited (2,270 ) 58.35 Performance stock at September 30, 2020 19,956 $ 118.66
Schedule of Share-based Payment Award, Awards Other Than Stock Options, Valuation Assumptions [Table Text Block]	Nine Months Ended September 30, 2020 Risk-free interest rate 1.41% Expected life (years) 2.88 Expected volatility 38.70% Expected dividend yield 0%
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]	Nine Months Ended September 30, 2020 2019 Risk-free interest rate 0.17 - 1.59% 2.33 - 2.35% Expected life (months) 6.00 6.00 Expected volatility 42.63 - 59.99% 37.36 - 53.57% Expected dividend yield 0% 0%

Note 9 - Accumulated Other Co_2

Note 9 - Accumulated Other Comprehensive Loss (Tables)	9 Months Ended
	Sep. 30, 2020
Notes Tables
Comprehensive Income (Loss) [Table Text Block]	Three Months Ended Nine Months Ended September 30, September 30, (in thousands) 2020 2019 2020 2019 Foreign currency translation adjustments Balance at beginning of period $ (9,634 ) $ (8,494 ) $ (7,018 ) $ (8,492 ) Other comprehensive income (loss) before reclassifications 3,110 (2,150 ) 494 (2,152 ) Amounts reclassified from accumulated other comprehensive loss - - - - Net current-period other comprehensive income (loss) 3,110 (2,150 ) 494 (2,152 ) Balance at end of period $ (6,524 ) $ (10,644 ) $ (6,524 ) $ (10,644 )

Note 11 - Segment Reporting (Ta

Note 11 - Segment Reporting (Tables)	9 Months Ended
	Sep. 30, 2020
Notes Tables
Income from Operations by Geographic Area [Table Text Block]	Three Months Ended September 30, Nine Months Ended September 30, (in thousands) 2020 2019 2020 2019 Income from Operations: United States $ 25,164 $ 28,109 $ 74,602 $ 82,367 Europe 3,764 4,045 10,389 12,022 Corporate Unallocated and Japan (11,259 ) (10,881 ) (36,146 ) (34,095 ) Total Income from Operations $ 17,669 $ 21,273 $ 48,845 $ 60,294
Long-lived Assets by Geographic Areas [Table Text Block]	September 30, December 31, (in thousands) 2020 2019 Total long-lived assets: United States $ 219,425 $ 210,171 Europe 54,628 45,019 Japan 7,842 8,522 Total Assets $ 281,895 $ 263,712
Disaggregation of Revenue [Table Text Block]	Three Months Ended September 30, Nine Months Ended September 30, (in thousands) 2020 2019 2020 2019 Revenue: Injection Molding $ 53,257 $ 55,167 $ 165,927 $ 165,935 CNC Machining 33,115 40,219 99,760 116,979 3D Printing 16,294 15,898 46,478 45,644 Sheet Metal 3,988 5,280 14,306 15,777 Other Revenue 850 891 2,716 2,504 Total revenue $ 107,504 $ 117,455 $ 329,187 $ 346,839
Operating Segments [Member]
Notes Tables
Revenue from External Customers by Geographic Areas [Table Text Block]	Three Months Ended September 30, Nine Months Ended September 30, (in thousands) 2020 2019 2020 2019 Revenue: United States $ 85,608 $ 92,916 $ 262,507 $ 271,877 Europe 18,897 20,721 56,413 62,915 Japan 2,999 3,818 10,267 12,047 Total revenue $ 107,504 $ 117,455 $ 329,187 $ 346,839

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						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Net income	$ 14,697	$ 12,607	$ 13,984	$ 16,792	$ 16,166	$ 15,511	$ 41,288	$ 48,469
Basic - weighted-average shares outstanding: (in shares)	26,736,709			26,846,030			26,724,715	26,894,420
Employee stock options and other (in shares)	149,724			159,311			136,932	178,453
Diluted - weighted-average shares outstanding: (in shares)	26,886,433			27,005,341			26,861,647	27,072,873
Basic (in dollars per share)	$ 0.55			$ 0.63			$ 1.54	$ 1.80
Diluted (in dollars per share)	$ 0.55			$ 0.62			$ 1.54	$ 1.79

Note 4 - Goodwill and Other I_3

Note 4 - Goodwill and Other Intangible Assets (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Goodwill, Period Increase (Decrease), Total	$ 0		$ 0
Amortization of Intangible Assets, Total	$ 800	$ 900	$ 2,300	$ 2,600

Note 4 - Goodwill and Other I_4

Note 4 - Goodwill and Other Intangible Assets - Intangible Assets Other Than Goodwill (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Gross	$ 24,499	$ 24,499
Accumulated Amortization	(9,392)	(7,130)
Net	15,107	17,369
Marketing-Related Intangible Assets [Member]
Gross	930	930
Accumulated Amortization	(597)	(527)
Net	$ 333	403
Useful Life (Year)	10 years
Weighted average useful life remaining (Year)	3 years 6 months
Noncompete Agreements [Member]
Gross	$ 270	270
Accumulated Amortization	(234)	(222)
Net	$ 36	48
Weighted average useful life remaining (Year)	2 years 3 months 18 days
Noncompete Agreements [Member] | Minimum [Member]
Useful Life (Year)	2 years
Noncompete Agreements [Member] | Maximum [Member]
Useful Life (Year)	5 years
Computer Software, Intangible Asset [Member]
Gross	$ 13,229	13,229
Accumulated Amortization	(3,302)	(2,275)
Net	$ 9,927	10,954
Useful Life (Year)	10 years
Weighted average useful life remaining (Year)	7 years 3 months 18 days
Customer Relationships [Member]
Gross	$ 10,070	10,070
Accumulated Amortization	(5,259)	(4,106)
Net	$ 4,811	$ 5,964
Weighted average useful life remaining (Year)	3 years 1 month 6 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	Sep. 30, 2020	Dec. 31, 2019
Remaining 2020	$ 754
2021	3,016
2022	3,016
2023	2,813
2024	1,400
Thereafter	4,108
Total estimated amortization expense	$ 15,107	$ 17,369

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	Sep. 30, 2020	Dec. 31, 2019
Fair Value, Inputs, Level 1 [Member]
Money market mutual fund	$ 66,374	$ 68,962
Total	66,374	68,962
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	Sep. 30, 2020	Dec. 31, 2019
Amortized Cost	$ 82,362	$ 48,397
Unrealized Gains	465	112
Unrealized Losses	(40)	(22)
Fair Value	82,787	48,487
Bank Time Deposits [Member]
Amortized Cost	5,189	1,484
Unrealized Gains	105	22
Unrealized Losses	0	0
Fair Value	5,294	1,506
US States and Political Subdivisions Debt Securities [Member]
Amortized Cost	17,795	10,204
Unrealized Gains	68	9
Unrealized Losses	0	(3)
Fair Value	17,863	10,210
Corporate Debt Securities [Member]
Amortized Cost	38,876	26,944
Unrealized Gains	283	80
Unrealized Losses	(25)	(12)
Fair Value	39,134	27,012
US Government Agencies Debt Securities [Member]
Amortized Cost	19,003	6,274
Unrealized Gains	9	1
Unrealized Losses	(15)	(7)
Fair Value	18,997	6,268
Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Amortized Cost	1,499	3,491
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	$ 1,499	$ 3,491

Note 6 - Marketable Securitie_3

Note 6 - Marketable Securities - Balance of Held-to-maturity Debt Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Due in one year or less	$ 30,993
Due after one year through five years	51,369
Total marketable securities	$ 82,362	$ 48,397

Note 7 - Inventory - Inventory

Note 7 - Inventory - Inventory (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Raw materials	$ 10,650	$ 9,818
Work in process	16	501
Total inventory	10,666	10,319
Allowance for obsolescence	(264)	(244)
Inventory, net of allowance	$ 10,402	$ 10,075

Note 8 - Stock-based Compensa_3

Note 8 - Stock-based Compensation (Details Textual) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Share-based Payment Arrangement, Expense	$ 3.9	$ 3.2	$ 10.6	$ 9.7
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)			$ 45.32
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 (Month)			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 (Year)			10 years
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total	4.8		$ 4.8
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)			2 years 9 months 18 days
Share-based Payment Arrangement, Option [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)			4 years
Share-based Payment Arrangement, Option [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)			5 years
Restricted Stock [Member]
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total	24.3		$ 24.3
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)			2 years 7 months 6 days
Restricted Stock [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)			4 years
Restricted Stock [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)			5 years
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)			3 years
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total	$ 1.9		$ 1.9
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)			2 years 4 months 24 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%
Long-Term Incentive Plan 2012 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)			10 years

Note 8 - Stock-based Compensa_4

Note 8 - Stock-based Compensation - Stock Option Activity (Details)	9 Months Ended
	Sep. 30, 2020$ / sharesshares
Options outstanding (in shares) | shares	276,266
Options outstanding, weighted-average exercise price (in dollars per share) | $ / shares	$ 72.38
Granted (in shares) | shares	60,065
Granted, weighted-average exercise price (in dollars per share) | $ / shares	$ 105.79
Exercised (in shares) | shares	(64,932)
Exercised, weighted-average exercise price (in dollars per share) | $ / shares	$ 57.24
Forfeited (in shares) | shares	(37,842)
Forfeited, weighted-average exercise price (in dollars per share) | $ / shares	$ 67.92
Options outstanding (in shares) | shares	233,557
Options outstanding, weighted-average exercise price (in dollars per share) | $ / shares	$ 85.89
Options exercisable (in shares) | shares	135,837
Options exercisable, weighted-average exercise price (in dollars per share) | $ / shares	$ 98.38

Note 8 - Stock-based Compensa_5

Note 8 - Stock-based Compensation - Assumptions Used in the Valuation of Options (Details) - Share-based Payment Arrangement, Option [Member]	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Expected life (years) (Year)	6 years 3 months	6 years 3 months
Expected dividend yield	0.00%	0.00%
Minimum [Member]
Risk-free interest rate	0.50%	2.35%
Expected volatility	42.40%	42.52%
Maximum [Member]
Risk-free interest rate	1.47%	2.58%
Expected volatility	43.83%	42.74%

Note 8 - Stock-based Compensa_6

Note 8 - Stock-based Compensation - Restricted Stock Options (Details) - Restricted Stock [Member]	9 Months Ended
	Sep. 30, 2020$ / sharesshares
Restricted stock (in shares) | shares	314,973
Restricted stock, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 89.55
Granted (in shares) | shares	108,179
Granted, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 117.76
Restrictions lapsed (in shares) | shares	(100,596)
Restrictions lapsed, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 84.57
Forfeited (in shares) | shares	(12,221)
Forfeited, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 92.61
Restricted stock (in shares) | shares	310,335
Restricted stock, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 98.84

Note 8 - Stock-based Compensa_7

Note 8 - Stock-based Compensation - Performance Stock (Details) - Performance Shares [Member]	9 Months Ended
	Sep. 30, 2020$ / sharesshares
Performance stock (in shares) | shares	9,383
Restricted stock, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 58.35
Granted (in shares) | shares	19,956
Granted, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 118.66
Restrictions lapsed (in shares) | shares	(7,113)
Restrictions lapsed, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 58.35
Performance change (in shares) | shares	0
Performance change, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 0
Forfeited (in shares) | shares	(2,270)
Forfeited, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 58.35
Performance stock (in shares) | shares	19,956
Restricted stock, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 118.66

Note 8 - Stock-based Compensa_8

Note 8 - Stock-based Compensation - Assumptions Used in the Valuation of Performance Stock (Details) - Performance Shares [Member]	9 Months Ended
	Sep. 30, 2020
Risk-free interest rate	1.41%
Expected life (years) (Year)	2 years 10 months 17 days
Expected volatility	38.70%
Expected dividend yield	0.00%

Note 8 - Stock-based Compensa_9

Note 8 - Stock-based Compensation - Assumptions Used to Estimate the Fair Value of the ESPP (Details) - Employee Stock Purchase Plan [Member]	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Expected life (months) (Month)	6 months	6 months
Expected dividend yield	0.00%	0.00%
Minimum [Member]
Risk-free interest rate	0.17%	2.33%
Expected volatility	42.63%	37.36%
Maximum [Member]
Risk-free interest rate	1.59%	2.35%
Expected volatility	59.99%	53.57%

Note 9 - Accumulated Other Co_3

Note 9 - Accumulated Other Comprehensive Loss - Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Balance	$ 601,249	$ 558,113	$ 585,790	$ 541,497
Balance	625,821	564,097	625,821	564,097
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance	(9,634)	(8,494)	(7,018)	(8,492)
Other comprehensive income (loss) before reclassifications	3,110	(2,150)	494	(2,152)
Amounts reclassified from accumulated other comprehensive loss	0	0	0	0
Net current-period other comprehensive income (loss)	3,110	(2,150)	494	(2,152)
Balance	$ (6,524)	$ (10,644)	$ (6,524)	$ (10,644)

Note 10 - Income Taxes (Details

Note 10 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Income Tax Expense (Benefit), Total	$ 3,700	$ 4,709		$ 10,106	$ 13,391
Effective Income Tax Rate Reconciliation, Percent, Total	20.10%		21.90%	19.70%	21.60%
Effective Income Tax Rate Continuing Operations Increase (Decrease) During the Period	(1.80%)			1.90%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent				21.00%
Unrecognized Tax Benefits, Ending Balance	$ 4,900			$ 4,900		$ 4,600
Income Taxes Payable, CARES Act	(2,600)			(2,600)
Deferred Tax Liabilities, CARES Act	$ 2,600			$ 2,600

Note 11 - Segment Reporting - R

Note 11 - Segment Reporting - Revenue From Operations by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue	$ 107,504	$ 117,455	$ 329,187	$ 346,839
Operating Segments [Member]
Revenue	107,504	117,455	329,187	346,839
Operating Segments [Member] | United States Segment [Member]
Revenue	85,608	92,916	262,507	271,877
Operating Segments [Member] | Europe Segment [Member]
Revenue	18,897	20,721	56,413	62,915
Operating Segments [Member] | Japan Segment [Member]
Revenue	$ 2,999	$ 3,818	$ 10,267	$ 12,047

Note 11 - Segment Reporting - I

Note 11 - Segment Reporting - Income From Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income from operations	$ 17,669	$ 21,273	$ 48,845	$ 60,294
Operating Segments [Member] | United States Segment [Member]
Income from operations	25,164	28,109	74,602	82,367
Operating Segments [Member] | Europe Segment [Member]
Income from operations	3,764	4,045	10,389	12,022
Operating Segments [Member] | Corporate Unallocated and Japan Segment[Member]
Income from operations	$ (11,259)	$ (10,881)	$ (36,146)	$ (34,095)

Note 11 - Segment Reporting - L

Note 11 - Segment Reporting - Long-lived Assets by Geographic Region (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Long-lived assets	$ 281,895	$ 263,712
Operating Segments [Member]
Long-lived assets	281,895	263,712
Operating Segments [Member] | United States Segment [Member]
Long-lived assets	219,425	210,171
Operating Segments [Member] | Europe Segment [Member]
Long-lived assets	54,628	45,019
Operating Segments [Member] | Japan Segment [Member]
Long-lived assets	$ 7,842	$ 8,522

Note 11 - Segment Reporting - D

Note 11 - Segment Reporting - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue	$ 107,504	$ 117,455	$ 329,187	$ 346,839
Injection Molding (Protomold) [Member]
Revenue	53,257	55,167	165,927	165,935
CNC Machining (Firstcut) [Member]
Revenue	33,115	40,219	99,760	116,979
3D Printing (Fineline) [Member]
Revenue	16,294	15,898	46,478	45,644
Sheet Metal [Member]
Revenue	3,988	5,280	14,306	15,777
Other Products [Member]
Revenue	$ 850	$ 891	$ 2,716	$ 2,504