Proto Labs (PRLB) 10-Q 3 Aug 21 2021 Q2 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2021	Jul. 29, 2021
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	Q2
Document Fiscal Year Focus	2021
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2021
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		27,761,063

Consolidated Balance Sheets (Cu

Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 41,909	$ 127,603
Short-term marketable securities	18,341	34,088
Accounts receivable, net of allowance for doubtful accounts of $1,997 and $1,781 as of June 30, 2021 and December 31, 2020, respectively	83,470	57,877
Inventory	9,111	10,862
Income taxes receivable	4,575	540
Prepaid expenses and other current assets	10,107	11,032
Total current assets	167,513	242,002
Property and equipment, net	288,495	282,666
Goodwill	407,191	128,752
Other intangible assets, net	41,674	14,350
Long-term marketable securities	28,700	59,357
Operating lease assets	8,801	9,855
Finance lease assets	2,147	2,396
Other long-term assets	4,769	4,826
Total assets	949,290	744,204
Current liabilities
Accounts payable	26,038	18,248
Accrued compensation	14,930	11,989
Accrued liabilities and other	15,072	16,193
Current contingent consideration	2,936	0
Current operating lease liabilities	2,847	3,272
Current finance lease liabilities	554	552
Income taxes payable	40	0
Total current liabilities	62,417	50,254
Long-term contingent consideration	2,693	0
Long-term operating lease liabilities	7,097	7,586
Long-term finance lease liabilities	1,639	1,919
Long-term deferred tax liabilities	36,898	33,854
Other long-term liabilities	6,569	6,235
Total liabilities	117,313	99,848
Shareholders' equity
Preferred stock, $0.001 par value, authorized 10,000,000 shares; issued and outstanding 0 shares as of each of June 30, 2021 and December 31, 2020	0	0
Common stock, $0.001 par value, authorized 150,000,000 shares; issued and outstanding 27,761,063 and 26,776,796 shares as of June 30, 2021 and December 31, 2020, respectively	28	27
Additional paid-in capital	461,597	284,848
Retained earnings	378,467	362,901
Accumulated other comprehensive loss	(8,115)	(3,420)
Total shareholders' equity	831,977	644,356
Total liabilities and shareholders' equity	$ 949,290	$ 744,204

Consolidated Balance Sheets (_2

Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($)	Jun. 30, 2021	Dec. 31, 2020
Allowance for doubtful accounts	$ 1,997	$ 1,781
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)	27,761,063	26,776,796
Common stock, shares outstanding (in shares)	27,761,063	26,776,796

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statements of Operations:
Revenue	$ 123,048	$ 106,575	$ 239,174	$ 221,683
Cost of revenue	66,423	54,119	127,219	111,127
Gross profit	56,625	52,456	111,955	110,556
Operating expenses
Marketing and sales	21,044	16,936	40,524	35,116
Research and development	11,060	8,648	23,241	17,635
General and administrative	8,417	12,521	27,825	26,629
Total operating expenses	40,521	38,105	91,590	79,380
Income from operations	16,104	14,351	20,365	31,176
Other income (loss), net	137	767	(176)	1,821
Income before income taxes	16,241	15,118	20,189	32,997
Provision for income taxes	3,326	2,511	3,562	6,406
Net income	$ 12,915	$ 12,607	$ 16,627	$ 26,591
Net income per share:
Basic (in dollars per share)	$ 0.47	$ 0.47	$ 0.60	$ 1
Diluted (in dollars per share)	$ 0.47	$ 0.47	$ 0.60	$ 0.99
Shares used to compute net income per share:
Basic (in shares)	27,735,732	26,660,498	27,600,684	26,718,652
Diluted (in shares)	27,744,870	26,760,866	27,741,464	26,837,938
Comprehensive Income (net of tax)
Comprehensive income	$ 14,896	$ 12,971	$ 11,932	$ 23,975

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, 2019	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 loss
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
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
Balance at Dec. 31, 2019	$ 27	268,059	324,722	(7,018)	585,790
Net income					26,591
Other comprehensive loss
Comprehensive income					23,975
Net income					26,591
Balance (in shares) at Dec. 31, 2019	26,786,459
Balance at Dec. 31, 2019	$ 27	268,059	324,722	(7,018)	585,790
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 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 loss
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
Balance (in shares) at Dec. 31, 2020	26,776,796				26,776,796
Balance at Dec. 31, 2020	$ 27	284,848	362,901	(3,420)	$ 644,356
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares)	48,955
Common shares issued on exercise of options and other, net of shares withheld for tax obligations	$ 0	(290)	0	0	(290)
Common shares issued for Hubs acquisition (in shares)	863,995
Common shares issued for Hubs acquisition	$ 1	166,708	0	0	166,709
Stock-based compensation expense	$ 0	5,620	0	0	5,620
Repurchases of common stock (in shares)	0
Repurchases of common stock	$ 0	0	0	0	0
Net income	0	0	3,712	0	3,712
Other comprehensive loss
Foreign currency translation adjustment	0	0	0	(6,842)	(6,842)
Net unrealized gains (losses) on investments in securities	$ 0	0	0	166	166
Comprehensive income					(2,964)
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares)	48,955
Common shares issued on exercise of options and other, net of shares withheld for tax obligations	$ 0	(290)	0	0	(290)
Stock-based compensation expense	$ 0	5,620	0	0	5,620
Repurchases of common stock (in shares)	0
Repurchases of common stock	$ 0	0	0	0	0
Net income	$ 0	0	3,712	0	$ 3,712
Balance (in shares) at Dec. 31, 2020	26,776,796				26,776,796
Balance at Dec. 31, 2020	$ 27	284,848	362,901	(3,420)	$ 644,356
Balance (in shares) at Mar. 31, 2021	27,689,746
Balance at Mar. 31, 2021	$ 28	456,886	366,613	(10,096)	$ 813,431
Balance (in shares) at Dec. 31, 2020	26,776,796				26,776,796
Balance at Dec. 31, 2020	$ 27	284,848	362,901	(3,420)	$ 644,356
Net income					16,627
Other comprehensive loss
Comprehensive income					11,932
Net income					$ 16,627
Balance (in shares) at Dec. 31, 2020	26,776,796				26,776,796
Balance at Dec. 31, 2020	$ 27	284,848	362,901	(3,420)	$ 644,356
Balance (in shares) at Jun. 30, 2021	27,761,063				27,761,063
Balance at Jun. 30, 2021	$ 28	461,597	378,467	(8,115)	$ 831,977
Balance (in shares) at Mar. 31, 2021	27,689,746
Balance at Mar. 31, 2021	$ 28	456,886	366,613	(10,096)	813,431
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares)	85,317
Common shares issued on exercise of options and other, net of shares withheld for tax obligations	$ 0	(81)	0	0	(81)
Stock-based compensation expense	$ 0	4,941	0	0	4,941
Repurchases of common stock (in shares)	(14,000)
Repurchases of common stock	$ 0	(149)	(1,061)	0	(1,210)
Net income	0	0	12,915	0	12,915
Other comprehensive loss
Foreign currency translation adjustment	0	0	0	2,030	2,030
Net unrealized gains (losses) on investments in securities	$ 0	0	0	(49)	(49)
Comprehensive income					14,896
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares)	85,317
Common shares issued on exercise of options and other, net of shares withheld for tax obligations	$ 0	(81)	0	0	(81)
Stock-based compensation expense	$ 0	4,941	0	0	4,941
Repurchases of common stock (in shares)	(14,000)
Repurchases of common stock	$ 0	(149)	(1,061)	0	(1,210)
Net income	$ 0	0	12,915	0	12,915
Balance (in shares) at Mar. 31, 2021	27,689,746
Balance at Mar. 31, 2021	$ 28	456,886	366,613	(10,096)	$ 813,431
Balance (in shares) at Jun. 30, 2021	27,761,063				27,761,063
Balance at Jun. 30, 2021	$ 28	$ 461,597	$ 378,467	$ (8,115)	$ 831,977

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Operating activities
Net income	$ 16,627	$ 26,591
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	20,127	15,855
Stock-based compensation expense	10,561	6,672
Deferred taxes	419	5,651
Amortization of marketable securities	261	129
Realized gain on available-sale-securities	(117)	0
Fair value of contingent consideration	(7,763)	0
Other	125	(854)
Changes in operating assets and liabilities:
Accounts receivable	(23,296)	(4,292)
Inventories	1,727	(801)
Prepaid expenses and other	1,810	(1,068)
Income taxes	(4,015)	(1,341)
Accounts payable	5,011	1,082
Accrued liabilities and other	(748)	5,793
Net cash provided by operating activities	20,729	53,417
Investing activities
Purchases of property, equipment and other capital assets	(23,929)	(33,305)
Cash used for acquisitions, net of cash acquired	(127,413)	0
Purchases of other assets and investments	0	(3,000)
Purchases of marketable securities	(15,159)	(57,212)
Proceeds from sales of marketable securities	47,694	0
Proceeds from maturities of marketable securities	13,725	28,225
Net cash used in investing activities	(105,082)	(65,292)
Financing activities
Proceeds from exercises of stock options	3,838	2,855
Purchases of shares withheld for tax obligations	(4,209)	(3,367)
Repurchases of common stock	(1,210)	(14,686)
Principal repayments of finance lease obligations	(275)	0
Net cash used in financing activities	(1,856)	(15,198)
Effect of exchange rate changes on cash and cash equivalents	515	(149)
Net decrease in cash and cash equivalents	(85,694)	(27,222)
Cash and cash equivalents, beginning of period	127,603	125,225
Cash and cash equivalents, end of period	$ 41,909	$ 98,003

Note 1 - Basis of Presentation

Note 1 - Basis of Presentation	6 Months Ended
	Jun. 30, 2021
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, 2020 February 19, 2021. The accompanying Consolidated Balance Sheet as of December 31, 2020 not 10 10 February 19, 2021

Note 2 - Recent Accounting Pron

Note 2 - Recent Accounting Pronouncements	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Significant Accounting Policies [Text Block]	Note 2 Recently Adopted Accounting Pronouncements In December 2019, 2019 12, Income Taxes (Topic 740 2019 12 2019 12 2019 12 December 15, 2020, 2019 12 January 1, 2021 no

Note 3 - Net Income Per Common

Note 3 - Net Income Per Common Share	6 Months Ended
	Jun. 30, 2021
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) 2021 2020 2021 2020 Net income $ 12,915 $ 12,607 $ 16,627 $ 26,591 Basic - weighted-average shares outstanding: 27,735,732 26,660,498 27,600,684 26,718,652 Effect of dilutive securities: Employee stock options and other 9,138 100,368 140,780 119,286 Diluted - weighted-average shares outstanding: 27,744,870 26,760,866 27,741,464 26,837,938 Net income per share: Basic $ 0.47 $ 0.47 $ 0.60 $ 1.00 Diluted $ 0.47 $ 0.47 $ 0.60 $ 0.99

Note 4 - Business Combinations

Note 4 - Business Combinations	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Business Combination Disclosure [Text Block]	Note 4 On January 22, 2021, 3D 2021 2022, Hubs is based in Amsterdam, Netherlands and is a leading online manufacturing platform that provides customers with on-demand access to a global network of premium manufacturing partners. The acquisition enhances the Company’s value proposition by expanding the customer offerings, enabling the Company to more holistically serve its customers. The fair value of the consideration paid for this acquisition has been allocated on a preliminary basis to the assets purchased and liabilities assumed based on their estimated fair values as of the acquisition date, with any excess recorded as goodwill. The goodwill associated with the acquisition represents both the strategic and growth opportunities by significantly expanding the customer offering with a network of premium manufacturing partners. The goodwill related to the acquisition is not The Company recorded a contingent consideration liability of $13.6 million as of the acquisition date representing the estimated fair value of the amounts payable to former shareholders, as outlined under the terms of the merger agreement, payable subject to the satisfaction of performance-based targets during fiscal year 2021 2022, $25.0 143,983 $27.8 3 second 2021, The results of Hubs since the date of acquisition have been included with Protolabs' results. Pro forma disclosures of the consolidated results of the Company with the full year effects of Hubs, as if the acquisition had occurred on January 1, 2020, not not not The acquisition has been accounted for under the acquisition method of accounting in accordance with ASC 805, Business Combinations second 2021, June 30, 2021, 2021. (in thousands) Acquisition Assets acquired: Current assets $ 2,497 Intangible assets 30,770 Goodwill 281,845 Other long-term assets 1,139 Total assets acquired 316,251 Liabilities assumed: Current contingent consideration 7,093 Current liabilities 5,666 Long-term contingent consideration 6,507 Long-term deferred tax liabilities 2,608 Other long-term liabilities 255 Total liabilities assumed 22,129 Net assets acquired 294,122 Cash paid 133,847 Cash acquired (6,434 ) Net cash consideration 127,413 Equity portion of purchase price 166,709 Total purchase consideration $ 294,122

Note 5 - Goodwill and Other Int

Note 5 - Goodwill and Other Intangible Assets	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Goodwill and Intangible Assets Disclosure [Text Block]	Note 5 The changes in the carrying amount of goodwill during the six June 30, 2021 (in thousands) Six Months Ended June 30, 2021 Balance as of the beginning of the period $ 128,752 Goodwill acquired during the period 281,845 Foreign currency translation adjustments (3,406 ) Balance as of the end of the period $ 407,191 Goodwill increased $281.8 million during the six June 30, 2021 €106.5 Intangible assets other than goodwill at June 30, 2021 December 31, 2020 June 30, 2021 December 31, 2020 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 $(667 ) $263 $930 $(620 ) $310 10.0 2.8 Non-compete agreement 853 (297 ) 556 270 (238 ) 32 2.0 - 5.0 3.3 Software technology 13,229 (4,330 ) 8,899 13,229 (3,645 ) 9,584 10.0 7.0 Software platform 27,170 (1,089 ) 26,081 - - - 10.0 9.6 Tradenames 365 (51 ) 314 - - - 3.0 2.6 Customer relationships 12,292 (6,731 ) 5,561 10,070 (5,646 ) 4,424 3.0 - 9.0 2.3 Total intangible assets $ 54,839 $ (13,165 ) $ 41,674 $ 24,499 $ (10,149 ) $ 14,350 Intangible assets increased $30.8 million during the six June 30, 2021 €11.6 June 30, 2021. December 31, 2020. three June 30, 2021 2020 six June 30, 2021 2020, Estimated aggregated amortization expense based on the current carrying value of the amortizable intangible assets and current exchange rates is as follows: (in thousands) Estimated Amortization Expense Remaining 2021 $ 3,130 2022 6,259 2023 6,056 2024 3,832 2025 3,750 Thereafter 18,647 Total estimated amortization expense $ 41,674

Note 6 - Fair Value Measurement

Note 6 - Fair Value Measurements	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Fair Value Disclosures [Text Block]	Note 6 Accounting Standards Codification, Fair Value Measuremen 820 820 three may Level 1—Quoted Level 2—Observable 1 not Level 3—Unobservable no The Company's assets and liabilities that are required to be measured or disclosed at fair value on a recurring basis include cash and cash equivalents, marketable securities and contingent consideration. 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 1 2 3 The following table summarizes financial assets as of June 30, 2021 December 31, 2020 June 30, 2021 December 31, 2020 (in thousands) Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 Financial Assets: Cash and cash equivalents $ 40,694 $ - $ - $ 72,225 $ - $ - Money market mutual fund 1,215 - - 55,378 - - Marketable securities 17,951 29,090 - - - - Total $ 59,860 $ 29,090 $ - $ 127,603 $ - $ - Financial Liabilities: Contingent consideration $ - $ - $ 5,629 $ - $ - $ - Total $ - $ - $ 5,629 $ - $ - $ - In the first 2021, The Company recorded a contingent consideration liability at the acquisition date of Hubs representing the amounts payable to former shareholders, as outlined under the terms of the merger agreement, payable subject to the satisfaction of performance-based targets during fiscal year 2021 2022, 3

Note 7 - Marketable Securities

Note 7 - Marketable Securities	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Investment [Text Block]	Note 7 The Company invests in short-term and long-term agency, municipal, corporate and other debt securities. As of June 30, 2021 December 31, 2020, first 2021 not June 30, 2021 December 31, 2020 June 30, 2021 (in thousands) Cost Unrealized Gains Unrealized Losses Fair Value U.S. municipal securities $ 20,968 $ 43 $ (17 ) $ 20,994 Corporate debt securities 19,062 68 (29 ) 19,101 U.S. government agency securities 1,500 - (2 ) 1,498 Certificates of deposit/time deposits 5,394 54 - 5,448 Total marketable securities $ 46,924 $ 165 $ (48 ) $ 47,041 December 31, 2020 (in thousands) Cost Unrealized Gains Unrealized Losses Fair Value U.S. municipal securities $ 25,003 $ 83 $ (2 ) $ 25,084 Corporate debt securities 42,048 211 (11 ) 42,248 U.S. government agency securities 18,500 6 (10 ) 18,496 Certificates of deposit/time deposits 5,395 93 - 5,488 Commercial paper 2,499 - - 2,499 Total marketable securities $ 93,445 $ 393 $ (23 ) $ 93,815 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 June 30, 2021 may may June 30, (in thousands) 2021 Due in one year or less $ 18,341 Due after one year through five years 28,700 Total marketable securities $ 47,041

Note 8 - Inventory

Note 8 - Inventory	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Inventory Disclosure [Text Block]	Note 8 Inventory consists primarily of raw materials, which are recorded at the lower of cost or market using the standard 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) 2021 2020 Total inventory $ 9,395 $ 11,122 Allowance for obsolescence (284 ) (260 ) Inventory, net of allowance $ 9,111 $ 10,862

Note 9 - Stock-based Compensati

Note 9 - Stock-based Compensation	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Share-based Payment Arrangement [Text Block]	Note 9 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 $4.9 million and $3.6 million for the three June 30, 2021 2020 six June 30, 2021 2020, Stock Options The following table summarizes stock option activity during the six June 30, 2021 Weighted- Average Stock Options Exercise Price Options outstanding at December 31, 2020 229,531 $ 86.46 Granted 57,901 128.14 Exercised (28,991 ) 58.78 Forfeited (8,547 ) 101.65 Options outstanding at June 30, 2021 249,894 $ 98.81 Exercisable at June 30, 2021 116,452 $ 81.38 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 six June 30, 2021 The following table provides the assumptions used in the Black-Scholes pricing model valuation of options during the six June 30, 2021 2020 Six Months Ended June 30, 2021 2020 Risk-free interest rate 0.80 - 1.12% 0.50 - 1.47% Expected life (years) 6.25 6.25 Expected volatility 45.28 - 45.53% 42.40 - 43.83% Expected dividend yield 0% 0% As of June 30, 2021 Restricted Stock Restricted stock awards are share-settled awards and restrictions lapse ratably over the vesting period, which is generally a period from three five first first The following table summarizes restricted stock activity during the six June 30, 2021 Weighted- Average Grant Date Restricted Fair Value Stock Per Share Restricted stock at December 31, 2020 307,199 $ 98.87 Granted 178,398 133.67 Restrictions lapsed (113,315 ) 91.10 Forfeited (14,525 ) 105.72 Restricted stock at June 30, 2021 357,757 $ 118.41 As of June 30, 2021 Performance Stock Performance stock units (PSUs) are expressed in terms of a target number of PSUs, with anywhere between 0 three 2017 2019 2021 2020 2021 The following table summarizes performance stock activity during the six June 30, 2021 Weighted- Average Grant Date Performance Fair Value Stock Per Share Performance stock at December 31, 2020 19,956 $ 118.66 Granted 15,078 203.64 Restrictions lapsed - - Performance change - - Forfeited (4,184 ) 99.59 Performance stock at June 30, 2021 30,850 $ 160.19 The following table provides the assumptions used in the Monte Carlo pricing model valuation of PSUs during the six June 30, 2021 2020 Six Months Ended June 30, 2021 2020 Risk-free interest rate 0.22 % 1.41 % Expected life (years) 2.87 2.88 Expected volatility 51.40 % 38.70 % Expected dividend yield 0 % 0 % As of June 30, 2021 Employee Stock Purchase Plan The following table presents the assumptions used to estimate the fair value of the ESPP during the six June 30, 2021 2020 Six Months Ended June 30, 2021 2020 Risk-free interest rate 0.06 - 0.12% 0.17 - 1.59% Expected life (months) 6.00 6.00 Expected volatility 50.85 - 65.53% 42.63 - 59.99% Expected dividend yield 0% 0%

Note 10 - Accumulated Other Com

Note 10 - Accumulated Other Comprehensive Income (Loss)	6 Months Ended
	Jun. 30, 2021
Notes to Financial Statements
Disclosure of Reclassification Amount [Text Block]	Note 10 Other comprehensive income (loss) is comprised of foreign currency translation adjustments and net unrealized gains (losses) on investments in securities. The following table presents the changes in accumulated other comprehensive income (loss) balances during the three six June 30, 2021 2020 Three Months Ended Six Months Ended June 30, June 30, (in thousands) 2021 2020 2021 2020 Balance at beginning of period $ (10,096 ) $ (9,998 ) $ (3,420 ) $ (7,018 ) Foreign currency translation adjustments Other comprehensive income (loss) before reclassifications 2,030 364 (4,812 ) (2,616 ) Amounts reclassified from accumulated other comprehensive loss - - - - Net current-period other comprehensive income (loss) 2,030 364 (4,812 ) (2,616 ) Net unrealized gains (losses) on investments in securities Other comprehensive income (loss) before reclassifications (49 ) - 117 - Amounts reclassified from accumulated other comprehensive loss - - - - Net current-period other comprehensive income (loss) (49 ) - 117 - Balance at end of period $ (8,115 ) $ (9,634 ) $ (8,115 ) $ (9,634 )

Note 11 - Income Taxes

Note 11 - Income Taxes	6 Months Ended
	Jun. 30, 2021
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 the three June 30, 2021 2020 three six June 30, 2021 not three June 30, 2021 three June 30, 2021 2020 six June 30, 2021 six June 30, 2021 2020 The effective income tax rate for the six June 30, 2021 The Company had unrecognized tax benefits totaling $5.0 million as of June 30, 2021 December 31, 2020 On March 11, 2021, not June 30, 2021

Note 12 - Segment Reporting

Note 12 - Segment Reporting	6 Months Ended
	Jun. 30, 2021
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 Revenue and income from operations by reportable segment for the three six June 30, 2021 2020 Three Months Ended June 30, Six Months Ended June 30, (in thousands) 2021 2020 2021 2020 Revenue: United States $ 95,344 $ 86,823 $ 186,397 $ 176,899 Europe 24,655 16,729 46,104 37,516 Japan 3,049 3,023 6,673 7,268 Total revenue $ 123,048 $ 106,575 $ 239,174 $ 221,683 Three Months Ended June 30, Six Months Ended June 30, (in thousands) 2021 2020 2021 2020 Income from Operations: United States $ 26,280 $ 24,349 $ 48,783 $ 49,438 Europe 5,063 2,261 3,692 6,625 Corporate Unallocated and Japan (15,239 ) (12,259 ) (32,110 ) (24,887 ) Total Income from Operations $ 16,104 $ 14,351 $ 20,365 $ 31,176 Total long-lived assets at June 30, 2021 December 31, 2020 June 30, December 31, (in thousands) 2021 2020 Total long-lived assets: United States $ 222,117 $ 215,721 Europe 60,140 59,388 Japan 6,238 7,557 Total Long-lived Assets $ 288,495 $ 282,666 Revenue by product line for the three six June 30, 2021 2020 Three Months Ended June 30, Six Months Ended June 30, (in thousands) 2021 2020 2021 2020 Revenue: Injection Molding $ 58,168 $ 57,894 $ 114,527 $ 112,670 CNC Machining 41,592 28,760 78,295 66,645 3D Printing 18,170 14,236 35,405 30,184 Sheet Metal 4,717 4,669 9,936 10,318 Other Revenue 401 1,016 1,011 1,866 Total revenue $ 123,048 $ 106,575 $ 239,174 $ 221,683

Note 3 - Net Income Per Commo_2

Note 3 - Net Income Per Common Share (Tables)	6 Months Ended
	Jun. 30, 2021
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) 2021 2020 2021 2020 Net income $ 12,915 $ 12,607 $ 16,627 $ 26,591 Basic - weighted-average shares outstanding: 27,735,732 26,660,498 27,600,684 26,718,652 Effect of dilutive securities: Employee stock options and other 9,138 100,368 140,780 119,286 Diluted - weighted-average shares outstanding: 27,744,870 26,760,866 27,741,464 26,837,938 Net income per share: Basic $ 0.47 $ 0.47 $ 0.60 $ 1.00 Diluted $ 0.47 $ 0.47 $ 0.60 $ 0.99

Note 4 - Business Combinations

Note 4 - Business Combinations (Tables)	6 Months Ended
	Jun. 30, 2021
Acquired 3D Hubs [Member]
Notes Tables
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	(in thousands) Acquisition Assets acquired: Current assets $ 2,497 Intangible assets 30,770 Goodwill 281,845 Other long-term assets 1,139 Total assets acquired 316,251 Liabilities assumed: Current contingent consideration 7,093 Current liabilities 5,666 Long-term contingent consideration 6,507 Long-term deferred tax liabilities 2,608 Other long-term liabilities 255 Total liabilities assumed 22,129 Net assets acquired 294,122 Cash paid 133,847 Cash acquired (6,434 ) Net cash consideration 127,413 Equity portion of purchase price 166,709 Total purchase consideration $ 294,122

Note 5 - Goodwill and Other I_2

Note 5 - Goodwill and Other Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2021
Notes Tables
Schedule of Goodwill [Table Text Block]	(in thousands) Six Months Ended June 30, 2021 Balance as of the beginning of the period $ 128,752 Goodwill acquired during the period 281,845 Foreign currency translation adjustments (3,406 ) Balance as of the end of the period $ 407,191
Schedule of Finite-Lived Intangible Assets [Table Text Block]	June 30, 2021 December 31, 2020 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 $(667 ) $263 $930 $(620 ) $310 10.0 2.8 Non-compete agreement 853 (297 ) 556 270 (238 ) 32 2.0 - 5.0 3.3 Software technology 13,229 (4,330 ) 8,899 13,229 (3,645 ) 9,584 10.0 7.0 Software platform 27,170 (1,089 ) 26,081 - - - 10.0 9.6 Tradenames 365 (51 ) 314 - - - 3.0 2.6 Customer relationships 12,292 (6,731 ) 5,561 10,070 (5,646 ) 4,424 3.0 - 9.0 2.3 Total intangible assets $ 54,839 $ (13,165 ) $ 41,674 $ 24,499 $ (10,149 ) $ 14,350
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	(in thousands) Estimated Amortization Expense Remaining 2021 $ 3,130 2022 6,259 2023 6,056 2024 3,832 2025 3,750 Thereafter 18,647 Total estimated amortization expense $ 41,674

Note 6 - Fair Value Measureme_2

Note 6 - Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2021
Notes Tables
Fair Value, Assets Measured on Recurring Basis [Table Text Block]	June 30, 2021 December 31, 2020 (in thousands) Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 Financial Assets: Cash and cash equivalents $ 40,694 $ - $ - $ 72,225 $ - $ - Money market mutual fund 1,215 - - 55,378 - - Marketable securities 17,951 29,090 - - - - Total $ 59,860 $ 29,090 $ - $ 127,603 $ - $ - Financial Liabilities: Contingent consideration $ - $ - $ 5,629 $ - $ - $ - Total $ - $ - $ 5,629 $ - $ - $ -

Note 7 - Marketable Securities

Note 7 - Marketable Securities (Tables)	6 Months Ended
	Jun. 30, 2021
Notes Tables
Debt Securities, Available-for-sale [Table Text Block]	June 30, 2021 (in thousands) Cost Unrealized Gains Unrealized Losses Fair Value U.S. municipal securities $ 20,968 $ 43 $ (17 ) $ 20,994 Corporate debt securities 19,062 68 (29 ) 19,101 U.S. government agency securities 1,500 - (2 ) 1,498 Certificates of deposit/time deposits 5,394 54 - 5,448 Total marketable securities $ 46,924 $ 165 $ (48 ) $ 47,041 December 31, 2020 (in thousands) Cost Unrealized Gains Unrealized Losses Fair Value U.S. municipal securities $ 25,003 $ 83 $ (2 ) $ 25,084 Corporate debt securities 42,048 211 (11 ) 42,248 U.S. government agency securities 18,500 6 (10 ) 18,496 Certificates of deposit/time deposits 5,395 93 - 5,488 Commercial paper 2,499 - - 2,499 Total marketable securities $ 93,445 $ 393 $ (23 ) $ 93,815
Investments Classified by Contractual Maturity Date [Table Text Block]	June 30, (in thousands) 2021 Due in one year or less $ 18,341 Due after one year through five years 28,700 Total marketable securities $ 47,041

Note 8 - Inventory (Tables)

Note 8 - Inventory (Tables)	6 Months Ended
	Jun. 30, 2021
Notes Tables
Schedule of Inventory, Current [Table Text Block]	June 30, December 31, (in thousands) 2021 2020 Total inventory $ 9,395 $ 11,122 Allowance for obsolescence (284 ) (260 ) Inventory, net of allowance $ 9,111 $ 10,862

Note 9 - Stock-based Compensa_2

Note 9 - Stock-based Compensation (Tables)	6 Months Ended
	Jun. 30, 2021
Notes Tables
Share-based Payment Arrangement, Option, Activity [Table Text Block]	Weighted- Average Stock Options Exercise Price Options outstanding at December 31, 2020 229,531 $ 86.46 Granted 57,901 128.14 Exercised (28,991 ) 58.78 Forfeited (8,547 ) 101.65 Options outstanding at June 30, 2021 249,894 $ 98.81 Exercisable at June 30, 2021 116,452 $ 81.38
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	Six Months Ended June 30, 2021 2020 Risk-free interest rate 0.80 - 1.12% 0.50 - 1.47% Expected life (years) 6.25 6.25 Expected volatility 45.28 - 45.53% 42.40 - 43.83% 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, 2020 307,199 $ 98.87 Granted 178,398 133.67 Restrictions lapsed (113,315 ) 91.10 Forfeited (14,525 ) 105.72 Restricted stock at June 30, 2021 357,757 $ 118.41
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, 2020 19,956 $ 118.66 Granted 15,078 203.64 Restrictions lapsed - - Performance change - - Forfeited (4,184 ) 99.59 Performance stock at June 30, 2021 30,850 $ 160.19
Schedule of Share-based Payment Award, Awards Other Than Stock Options, Valuation Assumptions [Table Text Block]	Six Months Ended June 30, 2021 2020 Risk-free interest rate 0.22 % 1.41 % Expected life (years) 2.87 2.88 Expected volatility 51.40 % 38.70 % Expected dividend yield 0 % 0 %
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]	Six Months Ended June 30, 2021 2020 Risk-free interest rate 0.06 - 0.12% 0.17 - 1.59% Expected life (months) 6.00 6.00 Expected volatility 50.85 - 65.53% 42.63 - 59.99% Expected dividend yield 0% 0%

Note 10 - Accumulated Other C_2

Note 10 - Accumulated Other Comprehensive Income (Loss) (Tables)	6 Months Ended
	Jun. 30, 2021
Notes Tables
Comprehensive Income (Loss) [Table Text Block]	Three Months Ended Six Months Ended June 30, June 30, (in thousands) 2021 2020 2021 2020 Balance at beginning of period $ (10,096 ) $ (9,998 ) $ (3,420 ) $ (7,018 ) Foreign currency translation adjustments Other comprehensive income (loss) before reclassifications 2,030 364 (4,812 ) (2,616 ) Amounts reclassified from accumulated other comprehensive loss - - - - Net current-period other comprehensive income (loss) 2,030 364 (4,812 ) (2,616 ) Net unrealized gains (losses) on investments in securities Other comprehensive income (loss) before reclassifications (49 ) - 117 - Amounts reclassified from accumulated other comprehensive loss - - - - Net current-period other comprehensive income (loss) (49 ) - 117 - Balance at end of period $ (8,115 ) $ (9,634 ) $ (8,115 ) $ (9,634 )

Note 12 - Segment Reporting (Ta

Note 12 - Segment Reporting (Tables)	6 Months Ended
	Jun. 30, 2021
Notes Tables
Income from Operations by Geographic Area [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, (in thousands) 2021 2020 2021 2020 Income from Operations: United States $ 26,280 $ 24,349 $ 48,783 $ 49,438 Europe 5,063 2,261 3,692 6,625 Corporate Unallocated and Japan (15,239 ) (12,259 ) (32,110 ) (24,887 ) Total Income from Operations $ 16,104 $ 14,351 $ 20,365 $ 31,176
Long-lived Assets by Geographic Areas [Table Text Block]	June 30, December 31, (in thousands) 2021 2020 Total long-lived assets: United States $ 222,117 $ 215,721 Europe 60,140 59,388 Japan 6,238 7,557 Total Long-lived Assets $ 288,495 $ 282,666
Disaggregation of Revenue [Table Text Block]	Three Months Ended June 30, Six Months Ended June 30, (in thousands) 2021 2020 2021 2020 Revenue: Injection Molding $ 58,168 $ 57,894 $ 114,527 $ 112,670 CNC Machining 41,592 28,760 78,295 66,645 3D Printing 18,170 14,236 35,405 30,184 Sheet Metal 4,717 4,669 9,936 10,318 Other Revenue 401 1,016 1,011 1,866 Total revenue $ 123,048 $ 106,575 $ 239,174 $ 221,683
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) 2021 2020 2021 2020 Revenue: United States $ 95,344 $ 86,823 $ 186,397 $ 176,899 Europe 24,655 16,729 46,104 37,516 Japan 3,049 3,023 6,673 7,268 Total revenue $ 123,048 $ 106,575 $ 239,174 $ 221,683

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, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Net income	$ 12,915	$ 3,712	$ 12,607	$ 13,984	$ 16,627	$ 26,591
Basic - weighted-average shares outstanding: (in shares)	27,735,732		26,660,498		27,600,684	26,718,652
Employee stock options and other (in shares)	9,138		100,368		140,780	119,286
Diluted - weighted-average shares outstanding: (in shares)	27,744,870		26,760,866		27,741,464	26,837,938
Basic (in dollars per share)	$ 0.47		$ 0.47		$ 0.60	$ 1
Diluted (in dollars per share)	$ 0.47		$ 0.47		$ 0.60	$ 0.99

Note 4 - Business Combination_2

Note 4 - Business Combinations (Details Textual) - USD ($) $ in Thousands	Jan. 22, 2021	Jun. 30, 2021	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2021
Payments to Acquire Businesses, Net of Cash Acquired, Total			$ 127,413	$ 0
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability			$ (7,763)	$ 0
Acquired 3D Hubs [Member]
Business Combination, Consideration Transferred, Total	$ 294,122
Payments to Acquire Businesses, Net of Cash Acquired, Total	$ 127,413
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)	863,995
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable	$ 166,709
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	52,800
Payments to Acquire Businesses, Gross	133,847
Business Combination, Contingent Consideration, Liability, Total	$ 13,600
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability		$ (7,800)
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles		(3,900)
Goodwill, Purchase Accounting Adjustments		6,400
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Contingent Consideration		3,300
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deferred Tax Liabilities		(500)
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Cash Paid		$ (300)
Acquired 3D Hubs [Member] | Forecast [Member] | Maximum [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)					143,983
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable					$ 27,800
Payments to Acquire Businesses, Gross					$ 25,000

Note 4 - Business Combination_3

Note 4 - Business Combinations - Allocation of Purchase Price for the Acquisition of Rapid (Details) - USD ($) $ in Thousands	Jan. 22, 2021	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Assets acquired:
Goodwill		$ 407,191		$ 128,752
Liabilities assumed:
Net cash consideration		$ 127,413	$ 0
Acquired 3D Hubs [Member]
Assets acquired:
Current assets	$ 2,497
Intangible assets	30,770
Goodwill	281,845
Other long-term assets	1,139
Total assets acquired	316,251
Liabilities assumed:
Current contingent consideration	7,093
Current liabilities	5,666
Long-term contingent consideration	6,507
Long-term deferred tax liabilities	2,608
Other long-term liabilities	255
Total liabilities assumed	22,129
Net assets acquired	294,122
Payments to Acquire Businesses, Gross	133,847
Cash acquired	(6,434)
Net cash consideration	127,413
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable	166,709
Total purchase consideration	$ 294,122

Note 5 - Goodwill and Other I_3

Note 5 - Goodwill and Other Intangible Assets (Details Textual) $ in Thousands, € in Millions	Jan. 22, 2021USD ($)	Jan. 22, 2021EUR (€)	Jun. 30, 2021USD ($)	Jun. 30, 2020USD ($)	Jun. 30, 2021USD ($)	Jun. 30, 2020USD ($)	Dec. 31, 2020USD ($)
Goodwill, Acquired During Period					$ 281,845
Finite Lived Intangible Assets, Foreign Currency Translation Gain (Loss)							$ 0
Amortization of Intangible Assets, Total			$ 1,500	$ 800	3,000	$ 1,500
Acquired 3D Hubs [Member]
Goodwill, Acquired During Period					281,800
Finite-lived Intangible Assets Acquired					30,800
Finite Lived Intangible Assets, Foreign Currency Translation Gain (Loss)					$ (400)
Acquired 3D Hubs [Member] | Europe [Member]
Goodwill, Acquired During Period | €		€ 106.5
Finite-lived Intangible Assets Acquired | €		€ 11.6
Acquired 3D Hubs [Member] | UNITED STATES
Goodwill, Acquired During Period	$ 152,200
Finite-lived Intangible Assets Acquired	$ 16,600

Note 5 - Goodwill and Other I_4

Note 5 - Goodwill and Other Intangible Assets - Changes in the Carrying Amount of Goodwill (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2021USD ($)
Goodwill	$ 128,752
Goodwill acquired during the period	281,845
Foreign currency translation adjustments	(3,406)
Goodwill	$ 407,191

Note 5 - Goodwill and Other I_5

Note 5 - Goodwill and Other Intangible Assets - Intangible Assets Other Than Goodwill (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Gross	$ 54,839	$ 24,499
Accumulated Amortization	(13,165)	(10,149)
Net	41,674	14,350
Marketing-Related Intangible Assets [Member]
Gross	930	930
Accumulated Amortization	667	620
Net	$ 263	310
Useful Life (Year)	10 years
Weighted average useful life remaining (Year)	2 years 9 months 18 days
Noncompete Agreements [Member]
Gross	$ 853	270
Accumulated Amortization	(297)	(238)
Net	$ 556	32
Weighted average useful life remaining (Year)	3 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	(4,330)	(3,645)
Net	$ 8,899	9,584
Useful Life (Year)	10 years
Weighted average useful life remaining (Year)	7 years
Software Platform [Member]
Gross	$ 27,170	0
Accumulated Amortization	(1,089)	0
Net	$ 26,081	0
Useful Life (Year)	10 years
Weighted average useful life remaining (Year)	9 years 7 months 6 days
Trade Names [Member]
Gross	$ 365	0
Accumulated Amortization	(51)	0
Net	$ 314	0
Useful Life (Year)	3 years
Weighted average useful life remaining (Year)	2 years 7 months 6 days
Customer Relationships [Member]
Gross	$ 12,292	10,070
Accumulated Amortization	(6,731)	(5,646)
Net	$ 5,561	$ 4,424
Weighted average useful life remaining (Year)	2 years 3 months 18 days
Customer Relationships [Member] | Minimum [Member]
Useful Life (Year)	3 years
Customer Relationships [Member] | Maximum [Member]
Useful Life (Year)	9 years

Note 5 - Goodwill and Other I_6

Note 5 - Goodwill and Other Intangible Assets - Estimated Aggregated Amortization Expense (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Remaining 2021	$ 3,130
2022	6,259
2023	6,056
2024	3,832
2025	3,750
Thereafter	18,647
Total estimated amortization expense	$ 41,674	$ 14,350

Note 6 - Fair Value Measureme_3

Note 6 - Fair Value Measurements (Details Textual) - Acquired 3D Hubs [Member] - USD ($) $ in Thousands	Jan. 22, 2021	Dec. 31, 2021
Payments to Acquire Businesses, Gross	$ 133,847
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)	863,995
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable	$ 166,709
Maximum [Member] | Forecast [Member]
Payments to Acquire Businesses, Gross		$ 25,000
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)		143,983
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable		$ 27,800

Note 6 - Fair Value Measureme_4

Note 6 - Fair Value Measurements - Fair Value of Financial Assets Measured on a Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Marketable securities	$ 47,041
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Cash and cash equivalents	40,694	$ 72,225
Marketable securities	17,951	0
Total	59,860	127,603
Contingent consideration	0	0
Total	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]
Cash and cash equivalents	1,215	55,378
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Cash and cash equivalents	0	0
Marketable securities	29,090	0
Total	29,090	0
Contingent consideration	0	0
Total	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Money Market Funds [Member]
Cash and cash equivalents	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Cash and cash equivalents	0	0
Marketable securities	0	0
Total	0	0
Contingent consideration	5,629	0
Total	5,629	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Money Market Funds [Member]
Cash and cash equivalents	$ 0	$ 0

Note 7 - Marketable Securitie_2

Note 7 - Marketable Securities - Short-term and Long-term Available for Sale Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Amortized Cost	$ 46,924
Unrealized Gains	165
Unrealized Losses	(48)
Fair Value	47,041
Amortized Cost		$ 93,445
Unrealized Gains		393
Unrealized Losses		(23)
Fair Value		93,815
Bank Time Deposits [Member]
Amortized Cost	5,394
Unrealized Gains	54
Unrealized Losses	0
Fair Value	5,448
Amortized Cost		5,395
Unrealized Gains		93
Unrealized Losses		0
Fair Value		5,488
US States and Political Subdivisions Debt Securities [Member]
Amortized Cost	20,968
Unrealized Gains	43
Unrealized Losses	(17)
Fair Value	20,994
Amortized Cost		25,003
Unrealized Gains		83
Unrealized Losses		(2)
Fair Value		25,084
Corporate Debt Securities [Member]
Amortized Cost	19,062
Unrealized Gains	68
Unrealized Losses	(29)
Fair Value	19,101
Amortized Cost		42,048
Unrealized Gains		211
Unrealized Losses		(11)
Fair Value		42,248
US Government Agencies Debt Securities [Member]
Amortized Cost	1,500
Unrealized Gains	0
Unrealized Losses	(2)
Fair Value	$ 1,498
Amortized Cost		18,500
Unrealized Gains		6
Unrealized Losses		(10)
Fair Value		18,496
Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Amortized Cost		2,499
Unrealized Gains		0
Unrealized Losses		0
Fair Value		$ 2,499

Note 7 - Marketable Securitie_3

Note 7 - Marketable Securities - Balance of Held-to-maturity Debt Securities by Contractual Maturity (Details) $ in Thousands	Jun. 30, 2021USD ($)
Due in one year or less	$ 18,341
Due after one year through five years	28,700
Total marketable securities	$ 47,041

Note 8 - Inventory - Inventory

Note 8 - Inventory - Inventory (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Total inventory	$ 9,395	$ 11,122
Allowance for obsolescence	(284)	(260)
Inventory, net of allowance	$ 9,111	$ 10,862

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, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Share-based Payment Arrangement, Expense	$ 4.9	$ 3.6	$ 10.6	$ 6.7
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)			$ 57.26
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	5.8		$ 5.8
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)			3 years
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	36		$ 36
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)			2 years 9 months 18 days
Restricted Stock [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)			3 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	$ 3.2		$ 3.2
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 9 - Stock-based Compensa_4

Note 9 - Stock-based Compensation - Stock Option Activity (Details)	6 Months Ended
	Jun. 30, 2021$ / sharesshares
Options outstanding (in shares) | shares	229,531
Options outstanding, weighted-average exercise price (in dollars per share) | $ / shares	$ 86.46
Granted (in shares) | shares	57,901
Granted, weighted-average exercise price (in dollars per share) | $ / shares	$ 128.14
Exercised (in shares) | shares	(28,991)
Exercised, weighted-average exercise price (in dollars per share) | $ / shares	$ 58.78
Forfeited (in shares) | shares	(8,547)
Forfeited, weighted-average exercise price (in dollars per share) | $ / shares	$ 101.65
Options outstanding (in shares) | shares	249,894
Options outstanding, weighted-average exercise price (in dollars per share) | $ / shares	$ 98.81
Options exercisable (in shares) | shares	116,452
Options exercisable, weighted-average exercise price (in dollars per share) | $ / shares	$ 81.38

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, 2021	Jun. 30, 2020
Expected life (Year)	6 years 3 months	6 years 3 months
Expected dividend yield	0.00%	0.00%
Minimum [Member]
Risk-free interest rate	0.80%	0.50%
Expected volatility	45.28%	42.40%
Maximum [Member]
Risk-free interest rate	1.12%	1.47%
Expected volatility	45.53%	43.83%

Note 9 - Stock-based Compensa_6

Note 9 - Stock-based Compensation - Restricted Stock Options (Details) - Restricted Stock [Member]	6 Months Ended
	Jun. 30, 2021$ / sharesshares
Restricted stock (in shares) | shares	307,199
Restricted stock, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 98.87
Granted (in shares) | shares	178,398
Granted, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 133.67
Restrictions lapsed (in shares) | shares	(113,315)
Restrictions lapsed, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 91.10
Forfeited (in shares) | shares	(14,525)
Forfeited, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 105.72
Restricted stock (in shares) | shares	357,757
Restricted stock, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 118.41

Note 9 - Stock-based Compensa_7

Note 9 - Stock-based Compensation - Performance Stock (Details) - Performance Shares [Member]	6 Months Ended
	Jun. 30, 2021$ / sharesshares
Performance stock (in shares) | shares	19,956
Restricted stock, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 118.66
Granted (in shares) | shares	15,078
Granted, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 203.64
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	(4,184)
Forfeited, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 99.59
Performance stock (in shares) | shares	30,850
Restricted stock, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 160.19

Note 9 - Stock-based Compensa_8

Note 9 - Stock-based Compensation - Assumptions Used in the Valuation of Performance Stock (Details) - Performance Shares [Member]	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Risk-free interest rate	0.22%	1.41%
Expected life (Year)	2 years 10 months 13 days	2 years 10 months 17 days
Expected volatility	51.40%	38.70%
Expected dividend yield	0.00%	0.00%

Note 9 - Stock-based Compensa_9

Note 9 - Stock-based Compensation - Assumptions Used to Estimate the Fair Value of the ESPP (Details) - Employee Stock Purchase Plan [Member]	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Expected life (months) (Month)	6 months	6 months
Expected dividend yield	0.00%	0.00%
Minimum [Member]
Risk-free interest rate	0.06%	0.17%
Expected volatility	50.85%	42.63%
Maximum [Member]
Risk-free interest rate	0.12%	1.59%
Expected volatility	65.53%	59.99%

Note 10 - Accumulated Other C_3

Note 10 - Accumulated Other Comprehensive Income (Loss) - Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Balance	$ 813,431	$ 587,740	$ 644,356	$ 585,790
Balance	831,977	601,249	831,977	601,249
AOCI Attributable to Parent [Member]
Balance	(10,096)	(9,998)	(3,420)	(7,018)
Balance	(8,115)	(9,634)	(8,115)	(9,634)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Other comprehensive income (loss) before reclassifications	2,030	364	(4,812)	(2,616)
Amounts reclassified from accumulated other comprehensive loss	0	0	0	0
Net current-period other comprehensive income (loss)	2,030	364	(4,812)	(2,616)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
Other comprehensive income (loss) before reclassifications	(49)	0	117	0
Amounts reclassified from accumulated other comprehensive loss	0	0	0	0
Net current-period other comprehensive income (loss)	$ (49)	$ 0	$ 117	$ 0

Note 11 - Income Taxes (Details

Note 11 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Income Tax Expense (Benefit), Total	$ 3,326	$ 2,511	$ 3,562	$ 6,406
Effective Income Tax Rate Reconciliation, Percent, Total	20.50%	16.60%	17.60%	19.40%
Effective Income Tax Rate Continuing Operations Increase (Decrease) During the Period	3.90%		(1.80%)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			21.00%
Unrecognized Tax Benefits, Ending Balance	$ 5,000		$ 5,000		$ 4,800

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, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenue	$ 123,048	$ 106,575	$ 239,174	$ 221,683
Operating Segments [Member]
Revenue	123,048	106,575	239,174	221,683
Operating Segments [Member] | United States Segment [Member]
Revenue	95,344	86,823	186,397	176,899
Operating Segments [Member] | Europe Segment [Member]
Revenue	24,655	16,729	46,104	37,516
Operating Segments [Member] | Japan Segment [Member]
Revenue	$ 3,049	$ 3,023	$ 6,673	$ 7,268

Note 12 - Segment Reporting - I

Note 12 - Segment Reporting - Income From Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income from operations	$ 16,104	$ 14,351	$ 20,365	$ 31,176
Operating Segments [Member]
Income from operations	16,104	14,351	20,365	31,176
Operating Segments [Member] | United States Segment [Member]
Income from operations	26,280	24,349	48,783	49,438
Operating Segments [Member] | Europe Segment [Member]
Income from operations	5,063	2,261	3,692	6,625
Operating Segments [Member] | Japan Segment [Member]
Income from operations	$ (15,239)	$ (12,259)	$ (32,110)	$ (24,887)

Note 12 - Segment Reporting - L

Note 12 - Segment Reporting - Long-lived Assets by Geographic Region (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Long-lived assets	$ 288,495	$ 282,666
Operating Segments [Member]
Long-lived assets	288,495	282,666
Operating Segments [Member] | United States Segment [Member]
Long-lived assets	222,117	215,721
Operating Segments [Member] | Europe Segment [Member]
Long-lived assets	60,140	59,388
Operating Segments [Member] | Japan Segment [Member]
Long-lived assets	$ 6,238	$ 7,557

Note 12 - Segment Reporting - D

Note 12 - Segment Reporting - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenue	$ 123,048	$ 106,575	$ 239,174	$ 221,683
Injection Molding (Protomold) [Member]
Revenue	58,168	57,894	114,527	112,670
CNC Machining (Firstcut) [Member]
Revenue	41,592	28,760	78,295	66,645
3D Printing (Fineline) [Member]
Revenue	18,170	14,236	35,405	30,184
Sheet Metal [Member]
Revenue	4,717	4,669	9,936	10,318
Other Products [Member]
Revenue	$ 401	$ 1,016	$ 1,011	$ 1,866