Proto Labs (PRLB) 10-K 18 Feb 22 2021 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2021	Feb. 09, 2022	Jun. 30, 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	FY
Document Fiscal Year Focus	2021
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 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 Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
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 Public Float			$ 2,500,000,000
Entity Common Stock, Shares Outstanding		27,466,902
Auditor Name	Ernst & Young LLP
Auditor Location	Minneapolis, Minnesota
Auditor Firm ID	42
ICFR Auditor Attestation Flag	true

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 65,929	$ 127,603
Short-term marketable securities	11,580	34,088
Accounts receivable, net of allowance for doubtful accounts of $1,948 and $1,781 as of December 31, 2021 and December 31, 2020, respectively	80,051	57,877
Inventory	13,161	10,862
Prepaid expenses and other current assets	11,450	11,032
Income taxes receivable	1,321	540
Total current assets	183,492	242,002
Property and equipment, net	280,346	282,666
Goodwill	400,610	128,752
Other intangible assets, net	37,998	14,350
Long-term marketable securities	14,340	59,357
Operating lease assets	5,578	9,855
Finance lease assets	1,898	2,396
Other long-term assets	4,320	4,826
Total assets	928,582	744,204
Current liabilities
Accounts payable	25,364	18,248
Accrued compensation	13,704	11,989
Accrued liabilities and other	11,980	16,193
Current operating lease liabilities	3,298	3,272
Current finance lease liabilities	550	552
Total current liabilities	54,896	50,254
Long-term operating lease liabilities	2,245	7,586
Long-term finance lease liabilities	1,351	1,919
Long-term deferred tax liabilities	35,892	33,854
Other long-term liabilities	5,705	6,235
Total liabilities	100,089	99,848
Shareholders' equity
Preferred stock, $0.001 par value, authorized 10,000,000 shares; issued and outstanding 0 shares as of December 31, 2021 and December 31, 2020, respectively	0	0
Common stock, $0.001 par value, authorized 150,000,000 shares; issued and outstanding 27,465,945 and 26,776,796 shares as of December 31, 2021 and December 31, 2020, respectively	28	27
Additional paid-in capital	468,548	284,848
Retained earnings	376,734	362,901
Accumulated other comprehensive loss	(16,817)	(3,420)
Total shareholders' equity	828,493	644,356
Total liabilities and shareholders' equity	$ 928,582	$ 744,204

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Allowance for doubtful accounts	$ 1,948	$ 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)	27,465,945	26,776,796
Common stock, shares outstanding (in shares)	27,465,945	26,776,796

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statements of Operations:
Revenue	$ 488,098	$ 434,395	$ 458,728
Cost of revenue	265,407	216,568	223,438
Gross profit	222,691	217,827	235,290
Operating expenses
Marketing and sales	82,175	69,309	72,976
Research and development	44,241	36,940	32,692
General and administrative	55,933	51,742	49,766
Total operating expenses	182,349	157,991	155,434
Income from operations	40,342	59,836	79,856
Other (expense) income, net	(158)	3,109	1,337
Income before income taxes	40,184	62,945	81,193
Provision for income taxes	6,812	12,078	17,538
Net income	$ 33,372	$ 50,867	$ 63,655
Net income per share:
Basic (in dollars per share)	$ 1.21	$ 1.90	$ 2.37
Diluted (in dollars per share)	$ 1.21	$ 1.89	$ 2.35
Shares used to compute net income per share:
Basic (in shares)	27,617,627	26,737,425	26,866,985
Diluted (in shares)	27,653,099	26,896,357	27,049,423
Other Comprehensive Income (Loss), net of tax
Foreign currency translation adjustments	$ (13,278)	$ 3,598	$ 1,474
Net unrealized gains (losses) on investments in securities	(119)	0	0
Comprehensive income	$ 19,975	$ 54,465	$ 65,129

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Dec. 31, 2018	26,984,747
Balance at beginning of period 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)	128,174
Common shares issued on exercise of options and other, net of shares withheld for tax obligations		1,904			1,904
Stock-based compensation expense		10,781			10,781
Repurchases of Common Stock (in shares)	(326,462)
Net income			63,655		63,655
Foreign currency translation adjustment				1,474	1,474
Comprehensive income (loss)					65,129
Foreign currency translation adjustments				1,474	1,474
Net unrealized gains (losses) on investments in securities					0
Balance (in shares) at Dec. 31, 2019	26,786,459
Balance at end of period 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)	189,951
Common shares issued on exercise of options and other, net of shares withheld for tax obligations		4,114			4,114
Stock-based compensation expense		14,673			14,673
Repurchases of Common Stock (in shares)	(199,614)
Net income			50,867		50,867
Foreign currency translation adjustment				3,598	3,598
Comprehensive income (loss)					54,465
Repurchases of Common Stock		(1,998)	(12,688)		(14,686)
Foreign currency translation adjustments				3,598	3,598
Net unrealized gains (losses) on investments in securities					$ 0
Balance (in shares) at Dec. 31, 2020	26,776,796				26,776,796
Balance at end of period 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	$ 0	1,637	0	0	1,637
Stock-based compensation expense		19,095			19,095
Repurchases of Common Stock (in shares)	(351,582)
Net income			33,372		33,372
Foreign currency translation adjustment				(13,278)	(13,278)
Comprehensive income (loss)					19,975
Repurchases of Common Stock		(3,740)	(19,539)		(23,279)
Common shares issued for Hubs acquisition (in shares)	863,995
Common shares issued for Hubs acquisition	$ 1	166,708			166,709
Foreign currency translation adjustments				(13,278)	(13,278)
Net unrealized gains (losses) on investments in securities				(119)	$ (119)
Balance (in shares) at Dec. 31, 2021	27,465,945				27,465,945
Balance at end of period at Dec. 31, 2021	$ 28	$ 468,548	$ 376,734	$ (16,817)	$ 828,493

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating activities
Net income	$ 33,372	$ 50,867	$ 63,655
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	40,488	32,594	30,864
Stock-based compensation expense	19,095	14,673	10,781
Deferred taxes	339	7,577	6,106
Amortization of marketable securities	0	415	5
Realized loss on available-sale-securities	567	0	0
Changes in fair value of contingent consideration	(13,253)	0	0
Other	275	(336)	391
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	(20,112)	(91)	1,848
Inventories	(2,390)	(662)	60
Prepaid expenses and other	64	(1,680)	545
Income taxes	(774)	(1,960)	6,555
Accounts payable	4,654	1,492	(719)
Accrued liabilities and other	(7,083)	4,080	(4,039)
Net cash provided by operating activities	55,242	106,969	116,052
Investing activities
Purchases of property, equipment and other capital assets	(34,209)	(47,010)	(62,230)
Cash used for acquisitions, net of cash acquired	(127,413)	0	0
Purchases of other assets and investments	0	(3,000)	(4,000)
Purchases of marketable securities	(16,159)	(113,200)	(46,403)
Proceeds from sales of marketable securities	64,913	0	0
Proceeds from maturities of marketable securities	18,204	67,737	68,330
Net cash used in investing activities	(94,664)	(95,473)	(44,303)
Financing activities
Proceeds from exercises of stock options	5,862	7,557	4,391
Purchases of shares withheld for tax obligations	(4,225)	(3,443)	(2,487)
Repurchases of common stock	(23,279)	(14,686)	(33,521)
Principal repayments of finance lease obligations	(552)	(154)	0
Other	4	0	0
Net cash used in financing activities	(22,198)	(10,726)	(31,617)
Effect of exchange rate changes on cash and cash equivalents	(54)	1,608	47
Net (decrease) increase in cash and cash equivalents	(61,674)	2,378	40,179
Cash and cash equivalents, beginning of period	127,603	125,225	85,046
Cash and cash equivalents, end of period	65,929	127,603	125,225
Supplemental cash flow disclosure
Cash paid for interest	28	23	14
Cash paid for taxes	$ 7,583	$ 5,650	$ 4,002

Note 1 - Nature of Business

Note 1 - Nature of Business	12 Months Ended
	Dec. 31, 2021
Notes to Financial Statements
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	Note 1 Organization and business Proto Labs, Inc. and its subsidiaries (Proto Labs, the Company, we, us, or our) is a digital manufacturer of custom prototypes and on-demand production parts. The Company utilizes injection molding, computer numerical control (CNC) machining, 3D three 3D 2021, Name Location PL-US International LLC United States Hubs Manufacturing Inc. United States 3D United States Proto Labs Ltd. United Kingdom PL International Holdings, UK, Ltd. United Kingdom PL Euro Services Limited United Kingdom Proto Labs GmbH Germany Proto Labs Tooling GmbH Germany 3D Netherlands Proto Labs, G.K. Japan

Note 2 - Summary of Significant

Note 2 - Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2021
Notes to Financial Statements
Significant Accounting Policies [Text Block]	Note 2 Principles of consolidation The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries, as listed within “Organization and business” above. All intercompany accounts and transactions have been eliminated in consolidation. Comprehensive income Components of comprehensive income include net income, foreign currency translation adjustments and net unrealized gains and losses on investments in securities. Comprehensive income is disclosed in the accompanying Consolidated Statements of Comprehensive Income and Consolidated Statements of Shareholders’ Equity. Accounting estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (U.S. GAAP) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and related disclosures at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Cash and cash equivalents Cash and cash equivalents include cash and other investments, including marketable securities, with maturities of three may not Marketable securities As of December 31, 2021, first 2021, three As of December 31, 2020, first 2020, 2016 13, Financial Instruments – Credit Losses no Accounts receivable and allowance for doubtful accounts Accounts receivable are reported at the invoiced amount less an allowance for doubtful accounts. As of each balance sheet date, the Company evaluates its accounts receivable and establishes an allowance for doubtful accounts based on a combination of specific customer circumstances and credit conditions taking into account the history of write-offs and collections. A receivable is considered past due if payment has not Inventory 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 Property, equipment and leasehold improvements Property, equipment and leasehold improvements are stated at cost. Major improvements that substantially extend an asset’s useful life are capitalized. Repairs, maintenance and minor improvements are charged to operations as incurred. Depreciation, including amortization of leasehold improvements and assets recorded under capital leases, is calculated using the straight-line method over the estimated useful lives of the individual assets and ranges from 3 to 39 years. Manufacturing equipment is depreciated over 3 to 15 years, office furniture and equipment are depreciated over 3 to 7 years, computer hardware and software are depreciated over 3 to 5 years, building costs are depreciated over 39 years, leasehold improvements are depreciated over the estimated lives of the related assets or the life of the lease, whichever is shorter, and building and land improvements are depreciated over 10 to 39 years. Assets not not The Company follows ASC 350 40, Internal-Use Software December 31, 2021 2020 Goodwill The Company recognizes goodwill in accordance with ASC 350, Intangibles—Goodwill and Other not Goodwill is tested for impairment annually at the beginning of the fourth may 2021, 2021 may 2021 16 Capitalized Software Costs The Company follows ASC 350 40, Intangibles – Goodwill and Other, Internal-Use Software Other Intangible Assets Other intangible assets include software technology, customer relationships and other intangible assets acquired from other independent parties. Other intangible assets with a definite life are amortized over a period ranging from two may not Accounting for long-lived assets The Company periodically reviews the carrying amount of its property, equipment and leasehold improvements to determine if circumstances exist indicating an impairment or if depreciation periods should be modified. If facts or circumstances indicate that an impairment may Revenue recognition The Company recognizes revenue for its internal and outsourced manufacturing operations in accordance with ASC 606, Revenue from Contracts with Customers no two one second Leases The Company accounts for leases in accordance with ASC 842, Leases not The Company has operating leases for office space, manufacturing facilities and certain company vehicles and equipment and finance leases for certain company equipment. The leases have remaining lease terms of one eight 12 not may December 31, 2021 not Income taxes The Company accounts for income taxes in accordance with ASC 740, Income Taxes 740 may not ASC 740 not not. Stock-based compensation The Company accounts for stock-based compensation in accordance with ASC 718, Compensation—Stock Compensation 718 718, not In determining the compensation cost of the options granted, the fair value of options granted has been estimated on the date of grant using the Black-Scholes option-pricing model. Advertising costs Advertising is expensed as incurred and was approximately $11.6 million, $11.5 million and $13.0 million for the years ended December 31, 2021, 2020 2019 Research and development Research and development expenses consist primarily of personnel and outside service costs related to the development of new processes and product lines, enhancements of existing product lines, development of software for internal use, maintenance of internally developed software, quality assurance and testing. Costs for internal use software are evaluated by project and capitalized where appropriate under ASC 350 40, Intangibles - Goodwill and Other, Internal-Use Software December 31, 2021, 2020 2019 Foreign currency translation/transactions The Company translated the balance sheets of its foreign subsidiaries at period-end exchange rates and the income statement at the average exchange rates in effect throughout the period. The Company has recorded the translation adjustment as a separate component of consolidated shareholders’ equity. Foreign currency transaction gains and losses are recognized in the Consolidated Statements of Comprehensive Income. 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 - Revenue

Note 3 - Revenue	12 Months Ended
	Dec. 31, 2021
Notes to Financial Statements
Revenue from Contract with Customer [Text Block]	Note 3 The Company accounts for revenue in accordance with ASC 606, Revenue from Contracts with Customers A performance obligation is a promise in a contract to transfer a distinct good or service to the customer, and is the unit of account in ASC 606. 3D one second The Company manufactures parts that have no two Revenue by geographic region for the years ended December 31, 2021, 2020 2019 Year Ended December 31, (in thousands) 2021 2020 2019 Revenue: United States $ 384,458 $ 345,708 $ 360,205 Europe 90,399 74,796 82,805 Japan 13,241 13,891 15,718 Total revenue $ 488,098 $ 434,395 $ 458,728 Revenue by product line for the years ended December 31, 2021, 2020 2019 Year Ended December 31, (in thousands) 2021 2020 2019 Revenue: Injection Molding $ 226,117 $ 217,992 $ 217,415 CNC Machining 166,811 131,587 155,473 3D Printing 72,721 62,502 61,352 Sheet Metal 20,397 18,838 21,000 Other Revenue 2,052 3,476 3,488 Total revenue $ 488,098 $ 434,395 $ 458,728 The Company generally expenses sales commissions when incurred because the amortization period would have been one one not

Note 4 - Net Income Per Common

Note 4 - Net Income Per Common Share	12 Months Ended
	Dec. 31, 2021
Notes to Financial Statements
Earnings Per Share [Text Block]	Note 4 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 the 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 and other stock-based awards granted under stock-based compensation plans and shares committed to be purchased under the employee stock purchase plan. For the year ended December 31, 2021, The following table presents the calculation of net income per basic and diluted share attributable to common shareholders: Year Ended December 31, (in thousands, except share and per share amounts) 2021 2020 2019 Net Income $ 33,372 $ 50,867 $ 63,655 Basic - weighted-average shares outstanding: 27,617,627 26,737,425 26,866,985 Effect of dilutive securities: Employee stock options and other 35,472 158,932 182,438 Diluted - weighted-average shares outstanding: 27,653,099 26,896,357 27,049,423 Net income per share attributable to common shareholders: Basic $ 1.21 $ 1.90 $ 2.37 Diluted $ 1.21 $ 1.89 $ 2.35

Note 5 - Business Combinations

Note 5 - Business Combinations	12 Months Ended
	Dec. 31, 2021
Notes to Financial Statements
Business Combination Disclosure [Text Block]	Note 5 Business Combinations 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 to the assets purchased and liabilities assumed based on their 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, 3 December 31, 2021, not 2021 not 2022. The results of Hubs since the date of acquisition have been included within the Company's 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 2021 (in thousands) Assets acquired: Current assets $ 2,497 Intangible assets 30,770 Goodwill 280,925 Other long-term assets 1,139 Total assets acquired 315,331 Liabilities assumed: Current contingent consideration 7,093 Current liabilities 5,666 Long-term contingent consideration 6,507 Long-term deferred tax liabilities 1,688 Other long-term liabilities 255 Total liabilities assumed 21,209 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 6 - Goodwill and Other Int

Note 6 - Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2021
Notes to Financial Statements
Goodwill and Intangible Assets Disclosure [Text Block]	Note 6 The changes in the carrying amount of goodwill for the years ended December 31, 2021 2020 (in thousands) Dec. 31, 2019 Goodwill acquired during 2020 Dec. 31, 2020 Goodwill acquired during 2021 Foreign currency translation adjustments during 2021 Dec. 31, 2021 United States $ 123,883 $ - $ 123,883 $ 151,276 $ - $ 275,159 Europe 4,239 - 4,239 129,649 (9,067 ) 124,821 Japan 630 - 630 - - 630 Total goodwill $ 128,752 $ - $ 128,752 $ 280,925 $ (9,067 ) $ 400,610 Goodwill increased $280.9 million for the year ended December 31, 2021 €106.5 Intangible assets other than goodwill for the years ended December 31, 2021 2020 Year Ended December 31, 2021 Year Ended December 31, 2020 Weighted Average Useful Life (in thousands) Gross Accumulated Amortization Net Gross Accumulated Amortization Net Useful Life (in years) Remaining (in years) Marketing assets $ 930 $ (713 ) $ 217 $ 930 $ (620 ) $ 310 10.0 2.3 Non-compete agreement 842 (363 ) 479 270 (238 ) 32 2.0 - 5.0 2.9 Software technology 13,229 (5,014 ) 8,215 13,229 (3,645 ) 9,584 10.0 6.5 Software platform 26,725 (2,262 ) 24,463 - - - 12.0 11.1 Tradenames 359 (114 ) 245 - - - 3.0 2.1 Customer relationships 12,252 (7,873 ) 4,379 10,070 (5,646 ) 4,424 3.0 - 9.0 1.8 Total intangible assets $ 54,337 $ (16,339 ) $ 37,998 $ 24,499 $ (10,149 ) $ 14,350 Amortization expense for intangible assets for the years ended December 31, 2021, 2020 2019 December 31, 2021, December 31, 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 2022 $ 6,172 2023 5,968 2024 3,790 2025 3,690 2026 3,586 Thereafter 14,792 Total estimated amortization expense $ 37,998

Note 7 - Fair Value Measurement

Note 7 - Fair Value Measurements	12 Months Ended
	Dec. 31, 2021
Notes to Financial Statements
Fair Value Disclosures [Text Block]	Note 7 ASC 820, 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 and marketable securities. 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 December 31, 2021. The following tables summarizes financial assets as of December 31, 2021 2020 December 31, 2021 December 31, 2020 (in thousands) Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 Financial Assets: Cash and cash equivalents $ 65,637 $ - $ - $ 72,225 $ - $ - Money market mutual fund 292 - - 55,378 - - Marketable securities 7,602 18,318 - - - - Total $ 73,531 $ 18,318 $ - $ 127,603 $ - $ -

Note 8 - Marketable Securities

Note 8 - Marketable Securities	12 Months Ended
	Dec. 31, 2021
Notes to Financial Statements
Investment [Text Block]	Note 8 The Company invests in short-term and long-term agency, municipal, corporate and other debt securities. As of December 31, 2021, December 31, 2020, first 2021 not Information regarding the Company’s short-term and long-term marketable securities as of December 31, 2021 2020 December 31, 2021 (in thousands) Amortized Cost Unrealized Gains Unrealized Losses Fair Value U.S. government agency securities $ 2,500 $ - $ (12 ) $ 2,488 Corporate debt securities 9,303 - (44 ) 9,259 U.S. municipal securities 12,549 - (70 ) 12,479 Commercial paper - - - - Certificates of deposit/time deposits 1,687 7 - 1,694 Total marketable securities $ 26,039 $ 7 $ (126 ) $ 25,920 December 31, 2020 (in thousands) Amortized Cost Unrealized Gains Unrealized Losses Fair Value U.S. government agency securities $ 18,500 $ 6 $ (10 ) $ 18,496 Corporate debt securities 42,048 211 (11 ) 42,248 U.S. municipal securities 25,003 83 (2 ) 25,084 Commercial paper 2,499 - - 2,499 Certificates of deposit/time deposits 5,395 93 - 5,488 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 December 31, 2021 may may December 31, (in thousands) 2021 Due in one year or less $ 11,580 Due after one year through five years 14,340 Total marketable securities $ 25,920

Note 9 - Property and Equipment

Note 9 - Property and Equipment	12 Months Ended
	Dec. 31, 2021
Notes to Financial Statements
Property, Plant and Equipment Disclosure [Text Block]	Note 9 Property and equipment consists of the following: December 31, (in thousands) 2021 2020 Land $ 15,009 $ 14,028 Buildings and improvements 107,241 77,285 Machinery and equipment 234,900 221,301 Computer hardware and software 81,889 79,207 Leasehold improvements 8,373 7,821 Construction in progress 14,489 33,780 Total 461,901 433,422 Accumulated depreciation and amortization (181,555 ) (150,756 ) Property and equipment, net $ 280,346 $ 282,666 Depreciation expense for the years ended December 31, 2021, 2020 2019

Note 10 - Inventory

Note 10 - Inventory	12 Months Ended
	Dec. 31, 2021
Notes to Financial Statements
Inventory Disclosure [Text Block]	Note 10 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 consists of the following: December 31, (in thousands) 2021 2020 Total inventory 13,474 11,122 Allowance for obsolescence (313 ) (260 ) Inventory, net of allowance $ 13,161 $ 10,862

Note 11 - Financing Obligations

Note 11 - Financing Obligations	12 Months Ended
	Dec. 31, 2021
Notes to Financial Statements
Debt Disclosure [Text Block]	Note 11 The Company had no financing obligations as of December 31, 2021 2020

Note 12 - Employee Benefit Plan

Note 12 - Employee Benefit Plans	12 Months Ended
	Dec. 31, 2021
Notes to Financial Statements
Retirement Benefits [Text Block]	Note 12 The Company maintains a 401 three may may may December 31, 2021, 2020 2019, The Company also sponsors a defined contribution retirement plan that covers the employees in the United Kingdom. Total employer contributions were approximately $0.4 million, $0.5 million and $0.3 million for the years ended December 31, 2021, 2020 2019,

Note 13 - Stock-based Compensat

Note 13 - Stock-based Compensation	12 Months Ended
	Dec. 31, 2021
Notes to Financial Statements
Share-based Payment Arrangement [Text Block]	Note 13 The Company has two 2000 2000 2012 2012 2012 February 12, 2012, not 2000 2012 No 2000 2012 2012 ten may 2012 may not The Company’s 2012 six first 718 Employees purchased 67,729 and 42,235 shares of common stock under the ESPP at an average exercise price of $61.96 and $85.85 during 2021 2020 December 31, 2021 The Company determines its stock-based compensation in accordance with ASC 718, Determining the appropriate fair value model and calculating the fair value of stock option grants requires the input of subjective assumptions. The Company uses the Black-Scholes option pricing model to value its stock option awards. Stock-based compensation expense is calculated using the Company’s best estimates, which involve inherent uncertainties and the application of management’s judgment. Significant estimates include its expected term and stock price volatility. The expected term of stock options is estimated from the vesting period of the award and represents the weighted average period that the Company's stock options are expected to be outstanding. The Company estimates the volatility of its stock price based on the historic volatility of its common stock. The Company bases the risk-free interest rate that it uses in the Black-Scholes option pricing model on U.S. Treasury instruments with maturities similar to the expected term of the award being valued. The Company has never paid and does not zero The following table summarizes stock-based compensation expense for the years ended December 31, 2021, 2020 2019 Year Ended December 31, (in thousands) 2021 2020 2019 Stock options and other $ 17,553 $ 13,327 $ 9,591 Employee stock purchase plan 1,542 1,346 1,190 Total stock-based compensation expense $ 19,095 $ 14,673 $ 10,781 Cost of revenue $ 2,595 $ 2,451 $ 2,056 Operating expenses: Marketing and sales 3,736 3,121 2,632 Research and development 2,833 2,440 1,851 General and administrative 9,931 6,661 4,242 Total stock-based compensation expense $ 19,095 $ 14,673 $ 10,781 Stock Options The following table provides the assumptions used in the Black-Scholes option pricing model for the years ended December 31, 2021, 2020 2019 Year Ended December 31, 2021 2020 2019 Risk-free interest rate 0.80 - 1.12% 0.50 - 1.47% 2.35 - 2.58% Expected life (years) 6.25 6.25 6.25 Expected volatility 45.28 - 45.53% 42.40 - 43.83% 42.52 - 42.74% Expected dividend yield 0% 0% 0% Weighted average grant date fair value $128.14 $45.32 $47.84 The following table summarizes stock option activity and the weighted average exercise price for the years ended December 31, 2021, 2020 2019 Weighted- Average Stock Options Exercise Price Options outstanding at January 1, 2019 252,616 $ 64.71 Granted 53,708 105.81 Exercised (16,079 ) 48.67 Cancelled (13,979 ) 89.50 Options outstanding at December 31, 2019 276,266 72.38 Granted 60,065 105.79 Exercised (68,958 ) 57.00 Cancelled (37,842 ) 67.92 Options outstanding at December 31, 2020 229,531 86.46 Granted 57,901 128.14 Exercised (28,991 ) 58.78 Cancelled (25,057 ) 109.31 Options outstanding at December 31, 2021 233,384 $ 97.78 Exercisable at December 31, 2021 115,700 $ 81.30 The outstanding options have a term of 10 years. For employees, options that have been granted become exercisable ratably over the vesting period, which is generally a four five first first The total intrinsic value of options exercised during the years ended December 31, 2021, 2020 2019 For options outstanding at December 31, 2021 December 31, 2021 The following table summarizes information about stock options outstanding at December 31, 2021 Options Outstanding, Vested and Expected to Vest Options Exercisable Range of Exercise Prices Number Outstanding Weighted Average Remaining Contractual Life Weighted Average Exercise Price ($) Number Exercisable Weighted Average Exercise Price ($) $7.76 to $31.43 4,624 0.35 30.58 4,624 30.58 $31.44 to $66.87 50,159 3.58 57.13 45,986 57.02 $66.88 to $96.20 41,586 7.82 89.95 9,570 71.68 $96.21 to $180.46 137,015 7.67 117.31 55,520 107.28 The fair value of share-based payment transactions is recognized in the Consolidated Statements of Comprehensive Income. As of December 31, 2021 December 31, 2021, 2020 2019 Restricted Stock The 2012 three five first first The following table summarizes restricted stock activity for the years ended December 31, 2021, 2020 2019 Weighted- Average Grant Date Restricted Fair Value Stock Awards Per Share Restricted stock at January 1, 2019 323,921 $ 79.85 Granted 115,471 106.35 Restrictions lapsed (92,597 ) 77.25 Forfeited (31,822 ) 87.58 Restricted stock at December 31, 2019 314,973 89.55 Granted 108,179 111.76 Restrictions lapsed (101,941 ) 84.70 Forfeited (14,012 ) 94.24 Restricted stock at December 31, 2020 307,199 98.87 Granted 205,996 123.61 Restrictions lapsed (115,908 ) 91.26 Forfeited (53,505 ) 128.05 Restricted stock at December 31, 2021 343,782 $ 111.79 As of December 31, 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 for the years ended December 31, 2021, 2020 2019 Weighted- Average Grant Date Performance Fair Value Stock Awards Per Share Performance stock at January 1, 2019 52,140 $ 76.54 Granted 21,434 104.99 Restrictions lapsed - - Performance change (61,816 ) 88.06 Forfeited (2,375 ) 105.37 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 December 31, 2020 19,956 118.66 Granted 15,078 203.64 Restrictions lapsed - - Performance change (10,366 ) 192.95 Forfeited (7,829 ) 113.91 Performance stock at December 31, 2021 16,839 $ 115.56 As of December 31, 2021 Employee Stock Purchase Plan The following table presents the assumptions used to estimate the fair value of the ESPP during the years ended December 31, 2021, 2020 2019 Year Ended December 31, 2021 2020 2019 Risk-free interest rate 0.06 - 0.17% 0.12 - 0.17% 1.59 - 2.35% Expected life (months) 6.00 6.00 6.00 Expected volatility 53.44 - 65.53% 50.85 - 59.99% 42.63 - 53.57% Expected dividend yield 0% 0% 0%

Note 14 - Leases

Note 14 - Leases	12 Months Ended
	Dec. 31, 2021
Notes to Financial Statements
Lessee, Operating Leases and Financing Leases [Text Block]	Note 14 Supplemental balance sheet information related to leases was as follows: December 31, (in thousands) 2021 2020 Operating lease assets $ 5,578 $ 9,855 Current operating lease liabilities $ 3,298 $ 3,272 Long-term operating lease liabilities 2,245 7,586 Total operating lease liabilities $ 5,543 $ 10,858 Finance lease assets $ 1,898 $ 2,396 Current finance lease liabilities $ 550 $ 552 Long-term finance lease liabilities 1,351 1,919 Total finance lease liabilities $ 1,901 $ 2,471 Lease expense is recognized on a straight-line basis over the lease term, with variable payments recognized in the period those payments are incurred. The components of lease expense for the periods reported were as follows: Twelve Months Ended December 31, (in thousands) 2021 2020 Operating lease cost $ 3,391 $ 4,191 Finance lease cost: Amortization of right-of-use assets $ 498 $ 143 Interest on lease obligations $ 9 $ 2 Variable lease cost 719 989 Total lease cost $ 4,617 $ 5,325 Maturities of operating and finance lease liabilities as of December 31, 2021 (in thousands) Operating Leases Finance Leases Year Ending December 31, 2022 $ 2,550 $ 561 2023 1,308 1,352 2024 751 - 2025 711 - 2026 344 - After 2027 - - Total future minimum lease payments 5,664 1,913 Less interest (121 ) (12 ) Present value of lease liabilities $ 5,543 $ 1,901 As of December 31, 2021 no not Weighted average remaining lease term and discount rate was as follows: December 31, 2021 2020 Weighted Average Remaining Lease Term - operating leases (years) 3.1 4.4 Weighted Average Remaining Lease Term - finance leases (years) 1.5 2.5 Weighted Average Discount Rate - operating leases 1.6 % 2.6 % Weighted Average Discount Rate - finance leases 0.4 % 0.5 % Supplemental cash flow information related to leases was as follows: Twelve Months Ended December 31, (in thousands) 2021 2020 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 10,477 $ 4,426 Operating cash flows from finance leases $ 9 $ 2 Financing cash flows from finance leases $ 552 $ 154 Lease assets obtained in exchange for new operating lease liabilities 5,293 1,506 Lease assets obtained in exchange for new financing lease liabilities - 2,523

Note 15 - Accumulated Other Com

Note 15 - Accumulated Other Comprehensive Income (Loss)	12 Months Ended
	Dec. 31, 2021
Notes to Financial Statements
Disclosure of Reclassification Amount [Text Block]	Note 15 Other comprehensive 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 loss balances for the years ending December 31, 2021, 2020 2019 Year Ended December 31, (in thousands) 2021 2020 2019 Balance at beginning of period $ (3,420 ) $ (7,018 ) $ (8,492 ) Foreign currency translation adjustments Other comprehensive (loss) income before reclassifications (13,278 ) 3,598 1,474 Amounts reclassified from accumulated other comprehensive income (loss) - - - Net current-period other comprehensive (loss) income (13,278 ) 3,598 1,474 Net unrealized gains (losses) on investments in securities Other comprehensive (loss) income before reclassifications (119 ) - - Amounts reclassified from accumulated other comprehensive income (loss) - - - Net current-period other comprehensive (loss) income (119 ) - - Balance at end of period $ (16,817 ) $ (3,420 ) $ (7,018 )

Note 16 - Income Taxes

Note 16 - Income Taxes	12 Months Ended
	Dec. 31, 2021
Notes to Financial Statements
Income Tax Disclosure [Text Block]	Note 16 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 years ended December 31, 2021, 2020 2019 December 31, 2021, 2020 2019 The effective tax rate decreased by 2.2% for the year ended December 31, 2021 2020 one The Coronavirus Aid, Relief, and Economic Security (CARES) Act was signed into law on March 27, 2020. 2017 2018 2019. December 31, 2020. March 31, 2020 December 31, 2020. 2020 2021. The provision for income taxes is based on income before income taxes reported for financial statement purposes. The components of income before income taxes are as follows: Year Ended December 31, (in thousands) 2021 2020 2019 Domestic $ 42,449 $ 58,551 $ 74,841 Foreign (2,265 ) 4,394 6,352 Total $ 40,184 $ 62,945 $ 81,193 Significant components of the provision for income taxes for the following periods are as follows: Year Ended December 31, (in thousands) 2021 2020 2019 Current: Federal $ 5,552 $ 2,128 $ 6,991 State 975 1,136 2,882 Foreign (64 ) 1,241 1,544 Deferred Federal (377 ) 6,904 5,121 State (814 ) (431 ) 269 Foreign (1,181 ) 210 (809 ) Valuation Allowance 2,721 890 1,540 Total $ 6,812 $ 12,078 $ 17,538 A reconciliation of the federal statutory income tax rate to the effective tax rate is as follows: Year Ended December 31, 2021 2020 2019 Federal tax statutory rate 21.0 % 21.0 % 21.0 % State tax (net of federal benefit) 2.1 2.1 2.1 Share based compensation (2.3 ) (1.3 ) (0.5 ) Valuation allowance against deferred tax assets 8.9 2.0 1.4 Contingent consideration reduction (7.0 ) - - Research and development credit (4.0 ) (3.7 ) (2.8 ) Foreign rate differential (2.2 ) (0.8 ) (0.3 ) Tax reserves (1.0 ) 1.4 1.1 Provision to return difference (0.7 ) (1.4 ) - Miscellaneous 2.2 (0.1 ) (0.4 ) Total 17.0 % 19.2 % 21.6 % Significant components of deferred tax assets and liabilities are as follows: December 31, (in thousands) 2021 2020 Deferred tax assets: Accrued expenses $ 2,511 $ 2,155 Leases 1,830 3,598 Warrants and stock options 4,271 3,356 Intangible assets - 1,693 Inventories 205 172 Research and development credit 2,126 1,661 Other assets 1,111 129 Net operating loss 14,046 6,647 Less valuation allowance (13,999 ) (9,138 ) Total deferred tax assets 12,101 10,273 Deferred tax liabilities: Depreciation (31,897 ) (32,671 ) Goodwill (9,872 ) (7,858 ) Intangible assets (4,394 ) - Leases (1,830 ) (3,598 ) Total deferred tax liabilities (47,993 ) (44,127 ) Net deferred tax liability $ (35,892 ) $ (33,854 ) The Company has recorded no U.S. deferred taxes related to the undistributed earnings of its non-U.S. subsidiaries as of December 31, 2021 not December 31, 2021 As of December 31, 2021 ten 2022 2031. may €1 €1 may €1 €1 The Company establishes valuation allowances for deferred tax assets when, after consideration of all positive and negative evidence, it is considered more-likely-than- not not December 31, 2021 2020 2021 The Company files a U.S. federal income tax return and income tax returns in various states and foreign jurisdictions. With a few exceptions, the Company is no 2017. The Company has liabilities related to unrecognized tax benefits totaling $4.4 million and $4.8 million at December 31, 2021 2020 December 31, 2021, 2020 2019 A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows: December 31, 2021 2020 Balance at beginning of period $ 4,830 $ 4,598 Additions for tax positions of current year 491 324 Additions for tax positions of prior years 781 475 Decrease related to expiration of statutes of limitations (1,738 ) (567 ) Balance at period end $ 4,364 $ 4,830

Note 17 - Litigation

Note 17 - Litigation	12 Months Ended
	Dec. 31, 2021
Notes to Financial Statements
Legal Matters and Contingencies [Text Block]	Note 17 From time to time, the Company may not

Note 18 - Segment Reporting

Note 18 - Segment Reporting	12 Months Ended
	Dec. 31, 2021
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	Note 18 The Company’s reportable segments are based on the internal reporting used by the Company’s CEO, who is the chief operating decision maker (CODM), to assess operating performance and make decisions about the allocation of resources. The Company’s reportable segments are based upon geographic region, consisting of the United States and Europe. The Corporate Unallocated and Japan category includes non-reportable segments, as well as research and development and general and administrative costs that are global in nature and that the Company does not Revenue in the United States is derived from Injection Molding, CNC Machining, 3D 3D 3D 3D The accounting policies of the reportable segments are the same as those described in Note 2 not Beginning in 2020, Revenue and income from operations by reportable segment are as follows: Year Ended December 31, (in thousands) 2021 2020 2019 Revenue: United States $ 384,458 $ 345,708 $ 360,205 Europe 90,399 74,796 82,805 Japan 13,241 13,891 15,718 Total revenue $ 488,098 $ 434,395 $ 458,728 Year Ended December 31, (in thousands) 2021 2020 2019 Income from Operations: United States $ 98,001 $ 98,762 $ 108,594 Europe 730 11,707 15,077 Corporate Unallocated and Japan (58,389 ) (50,633 ) (43,815 ) Total income from operations $ 40,342 $ 59,836 $ 79,856 Total long-lived assets, expenditures for additions to long-lived assets and depreciation and amortization expense are as follows: December 31, December 31, December 31, (in thousands) 2021 2020 2019 Long-lived assets: United States $ 215,701 $ 215,721 $ 210,171 Europe 59,388 59,388 45,019 Japan 5,257 7,557 8,522 Total long-lived assets $ 280,346 $ 282,666 $ 263,712 Year Ended December 31, (in thousands) 2021 2020 2019 Expenditures for additions to long-lived assets: United States $ 26,698 $ 29,984 $ 45,123 Europe 7,378 16,574 14,743 Japan 133 452 2,364 Total expenditures for additions to long-lived assets $ 34,209 $ 47,010 $ 62,230 Year Ended December 31, (in thousands) 2021 2020 2019 Depreciation and Amortization: United States $ 31,642 $ 25,744 $ 24,767 Europe 7,101 5,024 4,746 Japan 1,745 1,826 1,351 Total depreciation and amortization $ 40,488 $ 32,594 $ 30,864

Significant Accounting Policies

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Consolidation, Policy [Policy Text Block]	Principles of consolidation The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries, as listed within “Organization and business” above. All intercompany accounts and transactions have been eliminated in consolidation.
Comprehensive Income, Policy [Policy Text Block]	Comprehensive income Components of comprehensive income include net income, foreign currency translation adjustments and net unrealized gains and losses on investments in securities. Comprehensive income is disclosed in the accompanying Consolidated Statements of Comprehensive Income and Consolidated Statements of Shareholders’ Equity.
Use of Estimates, Policy [Policy Text Block]	Accounting estimates The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (U.S. GAAP) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and related disclosures at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash and cash equivalents Cash and cash equivalents include cash and other investments, including marketable securities, with maturities of three may not
Marketable Securities, Policy [Policy Text Block]	Marketable securities As of December 31, 2021, first 2021, three As of December 31, 2020, first 2020, 2016 13, Financial Instruments – Credit Losses no
Accounts Receivable [Policy Text Block]	Accounts receivable and allowance for doubtful accounts Accounts receivable are reported at the invoiced amount less an allowance for doubtful accounts. As of each balance sheet date, the Company evaluates its accounts receivable and establishes an allowance for doubtful accounts based on a combination of specific customer circumstances and credit conditions taking into account the history of write-offs and collections. A receivable is considered past due if payment has not
Inventory, Policy [Policy Text Block]	Inventory 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
Property, Plant and Equipment, Policy [Policy Text Block]	Property, equipment and leasehold improvements Property, equipment and leasehold improvements are stated at cost. Major improvements that substantially extend an asset’s useful life are capitalized. Repairs, maintenance and minor improvements are charged to operations as incurred. Depreciation, including amortization of leasehold improvements and assets recorded under capital leases, is calculated using the straight-line method over the estimated useful lives of the individual assets and ranges from 3 to 39 years. Manufacturing equipment is depreciated over 3 to 15 years, office furniture and equipment are depreciated over 3 to 7 years, computer hardware and software are depreciated over 3 to 5 years, building costs are depreciated over 39 years, leasehold improvements are depreciated over the estimated lives of the related assets or the life of the lease, whichever is shorter, and building and land improvements are depreciated over 10 to 39 years. Assets not not The Company follows ASC 350 40, Internal-Use Software December 31, 2021 2020
Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]	Goodwill The Company recognizes goodwill in accordance with ASC 350, Intangibles—Goodwill and Other not Goodwill is tested for impairment annually at the beginning of the fourth may 2021, 2021 may 2021 16
Internal Use Software, Policy [Policy Text Block]	Capitalized Software Costs The Company follows ASC 350 40, Intangibles – Goodwill and Other, Internal-Use Software
Goodwill and Intangible Assets, Intangible Assets, Policy [Policy Text Block]	Other Intangible Assets Other intangible assets include software technology, customer relationships and other intangible assets acquired from other independent parties. Other intangible assets with a definite life are amortized over a period ranging from two may not
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]	Accounting for long-lived assets The Company periodically reviews the carrying amount of its property, equipment and leasehold improvements to determine if circumstances exist indicating an impairment or if depreciation periods should be modified. If facts or circumstances indicate that an impairment may
Revenue [Policy Text Block]	Revenue recognition The Company recognizes revenue for its internal and outsourced manufacturing operations in accordance with ASC 606, Revenue from Contracts with Customers no two one second
Lessee, Leases [Policy Text Block]	Leases The Company accounts for leases in accordance with ASC 842, Leases not The Company has operating leases for office space, manufacturing facilities and certain company vehicles and equipment and finance leases for certain company equipment. The leases have remaining lease terms of one eight 12 not may December 31, 2021 not
Income Tax, Policy [Policy Text Block]	Income taxes The Company accounts for income taxes in accordance with ASC 740, Income Taxes 740 may not ASC 740 not not.
Compensation Related Costs, Policy [Policy Text Block]	Stock-based compensation The Company accounts for stock-based compensation in accordance with ASC 718, Compensation—Stock Compensation 718 718, not In determining the compensation cost of the options granted, the fair value of options granted has been estimated on the date of grant using the Black-Scholes option-pricing model.
Advertising Cost [Policy Text Block]	Advertising costs Advertising is expensed as incurred and was approximately $11.6 million, $11.5 million and $13.0 million for the years ended December 31, 2021, 2020 2019
Research and Development Expense, Policy [Policy Text Block]	Research and development Research and development expenses consist primarily of personnel and outside service costs related to the development of new processes and product lines, enhancements of existing product lines, development of software for internal use, maintenance of internally developed software, quality assurance and testing. Costs for internal use software are evaluated by project and capitalized where appropriate under ASC 350 40, Intangibles - Goodwill and Other, Internal-Use Software December 31, 2021, 2020 2019
Foreign Currency Transactions and Translations Policy [Policy Text Block]	Foreign currency translation/transactions The Company translated the balance sheets of its foreign subsidiaries at period-end exchange rates and the income statement at the average exchange rates in effect throughout the period. The Company has recorded the translation adjustment as a separate component of consolidated shareholders’ equity. Foreign currency transaction gains and losses are recognized in the Consolidated Statements of Comprehensive Income.
New Accounting Pronouncements, Policy [Policy Text Block]	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 - Revenue (Tables)

Note 3 - Revenue (Tables)	12 Months Ended
	Dec. 31, 2021
Notes Tables
Disaggregation of Revenue [Table Text Block]	Year Ended December 31, (in thousands) 2021 2020 2019 Revenue: United States $ 384,458 $ 345,708 $ 360,205 Europe 90,399 74,796 82,805 Japan 13,241 13,891 15,718 Total revenue $ 488,098 $ 434,395 $ 458,728 Year Ended December 31, (in thousands) 2021 2020 2019 Revenue: Injection Molding $ 226,117 $ 217,992 $ 217,415 CNC Machining 166,811 131,587 155,473 3D Printing 72,721 62,502 61,352 Sheet Metal 20,397 18,838 21,000 Other Revenue 2,052 3,476 3,488 Total revenue $ 488,098 $ 434,395 $ 458,728

Note 4 - Net Income Per Commo_2

Note 4 - Net Income Per Common Share (Tables)	12 Months Ended
	Dec. 31, 2021
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	Year Ended December 31, (in thousands, except share and per share amounts) 2021 2020 2019 Net Income $ 33,372 $ 50,867 $ 63,655 Basic - weighted-average shares outstanding: 27,617,627 26,737,425 26,866,985 Effect of dilutive securities: Employee stock options and other 35,472 158,932 182,438 Diluted - weighted-average shares outstanding: 27,653,099 26,896,357 27,049,423 Net income per share attributable to common shareholders: Basic $ 1.21 $ 1.90 $ 2.37 Diluted $ 1.21 $ 1.89 $ 2.35

Note 5 - Business Combinations

Note 5 - Business Combinations (Tables)	12 Months Ended
	Dec. 31, 2021
Acquired 3D Hubs [Member]
Notes Tables
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	(in thousands) Assets acquired: Current assets $ 2,497 Intangible assets 30,770 Goodwill 280,925 Other long-term assets 1,139 Total assets acquired 315,331 Liabilities assumed: Current contingent consideration 7,093 Current liabilities 5,666 Long-term contingent consideration 6,507 Long-term deferred tax liabilities 1,688 Other long-term liabilities 255 Total liabilities assumed 21,209 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 6 - Goodwill and Other I_2

Note 6 - Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2021
Notes Tables
Schedule of Goodwill [Table Text Block]	(in thousands) Dec. 31, 2019 Goodwill acquired during 2020 Dec. 31, 2020 Goodwill acquired during 2021 Foreign currency translation adjustments during 2021 Dec. 31, 2021 United States $ 123,883 $ - $ 123,883 $ 151,276 $ - $ 275,159 Europe 4,239 - 4,239 129,649 (9,067 ) 124,821 Japan 630 - 630 - - 630 Total goodwill $ 128,752 $ - $ 128,752 $ 280,925 $ (9,067 ) $ 400,610
Schedule of Finite-Lived Intangible Assets [Table Text Block]	Year Ended December 31, 2021 Year Ended December 31, 2020 Weighted Average Useful Life (in thousands) Gross Accumulated Amortization Net Gross Accumulated Amortization Net Useful Life (in years) Remaining (in years) Marketing assets $ 930 $ (713 ) $ 217 $ 930 $ (620 ) $ 310 10.0 2.3 Non-compete agreement 842 (363 ) 479 270 (238 ) 32 2.0 - 5.0 2.9 Software technology 13,229 (5,014 ) 8,215 13,229 (3,645 ) 9,584 10.0 6.5 Software platform 26,725 (2,262 ) 24,463 - - - 12.0 11.1 Tradenames 359 (114 ) 245 - - - 3.0 2.1 Customer relationships 12,252 (7,873 ) 4,379 10,070 (5,646 ) 4,424 3.0 - 9.0 1.8 Total intangible assets $ 54,337 $ (16,339 ) $ 37,998 $ 24,499 $ (10,149 ) $ 14,350
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	(in thousands) Estimated Amortization Expense 2022 $ 6,172 2023 5,968 2024 3,790 2025 3,690 2026 3,586 Thereafter 14,792 Total estimated amortization expense $ 37,998

Note 7 - Fair Value Measureme_2

Note 7 - Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2021
Notes Tables
Fair Value, Assets Measured on Recurring Basis [Table Text Block]	December 31, 2021 December 31, 2020 (in thousands) Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 Financial Assets: Cash and cash equivalents $ 65,637 $ - $ - $ 72,225 $ - $ - Money market mutual fund 292 - - 55,378 - - Marketable securities 7,602 18,318 - - - - Total $ 73,531 $ 18,318 $ - $ 127,603 $ - $ -

Note 8 - Marketable Securities

Note 8 - Marketable Securities (Tables)	12 Months Ended
	Dec. 31, 2021
Notes Tables
Debt Securities, Available-for-sale [Table Text Block]	December 31, 2021 (in thousands) Amortized Cost Unrealized Gains Unrealized Losses Fair Value U.S. government agency securities $ 2,500 $ - $ (12 ) $ 2,488 Corporate debt securities 9,303 - (44 ) 9,259 U.S. municipal securities 12,549 - (70 ) 12,479 Commercial paper - - - - Certificates of deposit/time deposits 1,687 7 - 1,694 Total marketable securities $ 26,039 $ 7 $ (126 ) $ 25,920
Debt Securities, Held-to-maturity [Table Text Block]	December 31, 2020 (in thousands) Amortized Cost Unrealized Gains Unrealized Losses Fair Value U.S. government agency securities $ 18,500 $ 6 $ (10 ) $ 18,496 Corporate debt securities 42,048 211 (11 ) 42,248 U.S. municipal securities 25,003 83 (2 ) 25,084 Commercial paper 2,499 - - 2,499 Certificates of deposit/time deposits 5,395 93 - 5,488 Total marketable securities $ 93,445 $ 393 $ (23 ) $ 93,815
Investments Classified by Contractual Maturity Date [Table Text Block]	December 31, (in thousands) 2021 Due in one year or less $ 11,580 Due after one year through five years 14,340 Total marketable securities $ 25,920

Note 9 - Property and Equipme_2

Note 9 - Property and Equipment (Tables)	12 Months Ended
	Dec. 31, 2021
Notes Tables
Property, Plant and Equipment [Table Text Block]	December 31, (in thousands) 2021 2020 Land $ 15,009 $ 14,028 Buildings and improvements 107,241 77,285 Machinery and equipment 234,900 221,301 Computer hardware and software 81,889 79,207 Leasehold improvements 8,373 7,821 Construction in progress 14,489 33,780 Total 461,901 433,422 Accumulated depreciation and amortization (181,555 ) (150,756 ) Property and equipment, net $ 280,346 $ 282,666

Note 10 - Inventory (Tables)

Note 10 - Inventory (Tables)	12 Months Ended
	Dec. 31, 2021
Notes Tables
Schedule of Inventory, Current [Table Text Block]	December 31, (in thousands) 2021 2020 Total inventory 13,474 11,122 Allowance for obsolescence (313 ) (260 ) Inventory, net of allowance $ 13,161 $ 10,862

Note 13 - Stock-based Compens_2

Note 13 - Stock-based Compensation (Tables)	12 Months Ended
	Dec. 31, 2021
Notes Tables
Share-based Payment Arrangement, Cost by Plan [Table Text Block]	Year Ended December 31, (in thousands) 2021 2020 2019 Stock options and other $ 17,553 $ 13,327 $ 9,591 Employee stock purchase plan 1,542 1,346 1,190 Total stock-based compensation expense $ 19,095 $ 14,673 $ 10,781 Cost of revenue $ 2,595 $ 2,451 $ 2,056 Operating expenses: Marketing and sales 3,736 3,121 2,632 Research and development 2,833 2,440 1,851 General and administrative 9,931 6,661 4,242 Total stock-based compensation expense $ 19,095 $ 14,673 $ 10,781
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	Year Ended December 31, 2021 2020 2019 Risk-free interest rate 0.80 - 1.12% 0.50 - 1.47% 2.35 - 2.58% Expected life (years) 6.25 6.25 6.25 Expected volatility 45.28 - 45.53% 42.40 - 43.83% 42.52 - 42.74% Expected dividend yield 0% 0% 0% Weighted average grant date fair value $128.14 $45.32 $47.84
Share-based Payment Arrangement, Option, Activity [Table Text Block]	Weighted- Average Stock Options Exercise Price Options outstanding at January 1, 2019 252,616 $ 64.71 Granted 53,708 105.81 Exercised (16,079 ) 48.67 Cancelled (13,979 ) 89.50 Options outstanding at December 31, 2019 276,266 72.38 Granted 60,065 105.79 Exercised (68,958 ) 57.00 Cancelled (37,842 ) 67.92 Options outstanding at December 31, 2020 229,531 86.46 Granted 57,901 128.14 Exercised (28,991 ) 58.78 Cancelled (25,057 ) 109.31 Options outstanding at December 31, 2021 233,384 $ 97.78 Exercisable at December 31, 2021 115,700 $ 81.30
Share-based Payment Arrangement, Option, Exercise Price Range [Table Text Block]	Options Outstanding, Vested and Expected to Vest Options Exercisable Range of Exercise Prices Number Outstanding Weighted Average Remaining Contractual Life Weighted Average Exercise Price ($) Number Exercisable Weighted Average Exercise Price ($) $7.76 to $31.43 4,624 0.35 30.58 4,624 30.58 $31.44 to $66.87 50,159 3.58 57.13 45,986 57.02 $66.88 to $96.20 41,586 7.82 89.95 9,570 71.68 $96.21 to $180.46 137,015 7.67 117.31 55,520 107.28
Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]	Weighted- Average Grant Date Restricted Fair Value Stock Awards Per Share Restricted stock at January 1, 2019 323,921 $ 79.85 Granted 115,471 106.35 Restrictions lapsed (92,597 ) 77.25 Forfeited (31,822 ) 87.58 Restricted stock at December 31, 2019 314,973 89.55 Granted 108,179 111.76 Restrictions lapsed (101,941 ) 84.70 Forfeited (14,012 ) 94.24 Restricted stock at December 31, 2020 307,199 98.87 Granted 205,996 123.61 Restrictions lapsed (115,908 ) 91.26 Forfeited (53,505 ) 128.05 Restricted stock at December 31, 2021 343,782 $ 111.79
Schedule of Nonvested Performance-based Units Activity [Table Text Block]	Weighted- Average Grant Date Performance Fair Value Stock Awards Per Share Performance stock at January 1, 2019 52,140 $ 76.54 Granted 21,434 104.99 Restrictions lapsed - - Performance change (61,816 ) 88.06 Forfeited (2,375 ) 105.37 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 December 31, 2020 19,956 118.66 Granted 15,078 203.64 Restrictions lapsed - - Performance change (10,366 ) 192.95 Forfeited (7,829 ) 113.91 Performance stock at December 31, 2021 16,839 $ 115.56
Schedule of Share-based Payment Award, Awards Other Than Stock Options, Valuation Assumptions [Table Text Block]	Year Ended December 31, 2021 2020 2019 Risk-free interest rate 0.06 - 0.17% 0.12 - 0.17% 1.59 - 2.35% Expected life (months) 6.00 6.00 6.00 Expected volatility 53.44 - 65.53% 50.85 - 59.99% 42.63 - 53.57% Expected dividend yield 0% 0% 0%

Note 14 - Leases (Tables)

Note 14 - Leases (Tables)	12 Months Ended
	Dec. 31, 2021
Notes Tables
Assets and Liabilities, Lessee [Table Text Block]	December 31, (in thousands) 2021 2020 Operating lease assets $ 5,578 $ 9,855 Current operating lease liabilities $ 3,298 $ 3,272 Long-term operating lease liabilities 2,245 7,586 Total operating lease liabilities $ 5,543 $ 10,858 Finance lease assets $ 1,898 $ 2,396 Current finance lease liabilities $ 550 $ 552 Long-term finance lease liabilities 1,351 1,919 Total finance lease liabilities $ 1,901 $ 2,471
Schedule of Lease Expense [Table Text Block]	Twelve Months Ended December 31, (in thousands) 2021 2020 Operating lease cost $ 3,391 $ 4,191 Finance lease cost: Amortization of right-of-use assets $ 498 $ 143 Interest on lease obligations $ 9 $ 2 Variable lease cost 719 989 Total lease cost $ 4,617 $ 5,325 Twelve Months Ended December 31, (in thousands) 2021 2020 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 10,477 $ 4,426 Operating cash flows from finance leases $ 9 $ 2 Financing cash flows from finance leases $ 552 $ 154 Lease assets obtained in exchange for new operating lease liabilities 5,293 1,506 Lease assets obtained in exchange for new financing lease liabilities - 2,523
Lessee, Lease Liability, Maturity [Table Text Block]	(in thousands) Operating Leases Finance Leases Year Ending December 31, 2022 $ 2,550 $ 561 2023 1,308 1,352 2024 751 - 2025 711 - 2026 344 - After 2027 - - Total future minimum lease payments 5,664 1,913 Less interest (121 ) (12 ) Present value of lease liabilities $ 5,543 $ 1,901
Schedule of Lease Terms and Discount Rates [Table Text Block]	December 31, 2021 2020 Weighted Average Remaining Lease Term - operating leases (years) 3.1 4.4 Weighted Average Remaining Lease Term - finance leases (years) 1.5 2.5 Weighted Average Discount Rate - operating leases 1.6 % 2.6 % Weighted Average Discount Rate - finance leases 0.4 % 0.5 %

Note 15 - Accumulated Other C_2

Note 15 - Accumulated Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Dec. 31, 2021
Notes Tables
Comprehensive Income (Loss) [Table Text Block]	Year Ended December 31, (in thousands) 2021 2020 2019 Balance at beginning of period $ (3,420 ) $ (7,018 ) $ (8,492 ) Foreign currency translation adjustments Other comprehensive (loss) income before reclassifications (13,278 ) 3,598 1,474 Amounts reclassified from accumulated other comprehensive income (loss) - - - Net current-period other comprehensive (loss) income (13,278 ) 3,598 1,474 Net unrealized gains (losses) on investments in securities Other comprehensive (loss) income before reclassifications (119 ) - - Amounts reclassified from accumulated other comprehensive income (loss) - - - Net current-period other comprehensive (loss) income (119 ) - - Balance at end of period $ (16,817 ) $ (3,420 ) $ (7,018 )

Note 16 - Income Taxes (Tables)

Note 16 - Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2021
Notes Tables
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]	Year Ended December 31, (in thousands) 2021 2020 2019 Domestic $ 42,449 $ 58,551 $ 74,841 Foreign (2,265 ) 4,394 6,352 Total $ 40,184 $ 62,945 $ 81,193
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	Year Ended December 31, (in thousands) 2021 2020 2019 Current: Federal $ 5,552 $ 2,128 $ 6,991 State 975 1,136 2,882 Foreign (64 ) 1,241 1,544 Deferred Federal (377 ) 6,904 5,121 State (814 ) (431 ) 269 Foreign (1,181 ) 210 (809 ) Valuation Allowance 2,721 890 1,540 Total $ 6,812 $ 12,078 $ 17,538
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	Year Ended December 31, 2021 2020 2019 Federal tax statutory rate 21.0 % 21.0 % 21.0 % State tax (net of federal benefit) 2.1 2.1 2.1 Share based compensation (2.3 ) (1.3 ) (0.5 ) Valuation allowance against deferred tax assets 8.9 2.0 1.4 Contingent consideration reduction (7.0 ) - - Research and development credit (4.0 ) (3.7 ) (2.8 ) Foreign rate differential (2.2 ) (0.8 ) (0.3 ) Tax reserves (1.0 ) 1.4 1.1 Provision to return difference (0.7 ) (1.4 ) - Miscellaneous 2.2 (0.1 ) (0.4 ) Total 17.0 % 19.2 % 21.6 %
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	December 31, (in thousands) 2021 2020 Deferred tax assets: Accrued expenses $ 2,511 $ 2,155 Leases 1,830 3,598 Warrants and stock options 4,271 3,356 Intangible assets - 1,693 Inventories 205 172 Research and development credit 2,126 1,661 Other assets 1,111 129 Net operating loss 14,046 6,647 Less valuation allowance (13,999 ) (9,138 ) Total deferred tax assets 12,101 10,273 Deferred tax liabilities: Depreciation (31,897 ) (32,671 ) Goodwill (9,872 ) (7,858 ) Intangible assets (4,394 ) - Leases (1,830 ) (3,598 ) Total deferred tax liabilities (47,993 ) (44,127 ) Net deferred tax liability $ (35,892 ) $ (33,854 )
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]	December 31, 2021 2020 Balance at beginning of period $ 4,830 $ 4,598 Additions for tax positions of current year 491 324 Additions for tax positions of prior years 781 475 Decrease related to expiration of statutes of limitations (1,738 ) (567 ) Balance at period end $ 4,364 $ 4,830

Note 18 - Segment Reporting (Ta

Note 18 - Segment Reporting (Tables)	12 Months Ended
	Dec. 31, 2021
Notes Tables
Income from Operations by Geographic Area [Table Text Block]	Year Ended December 31, (in thousands) 2021 2020 2019 Income from Operations: United States $ 98,001 $ 98,762 $ 108,594 Europe 730 11,707 15,077 Corporate Unallocated and Japan (58,389 ) (50,633 ) (43,815 ) Total income from operations $ 40,342 $ 59,836 $ 79,856
Long-lived Assets by Geographic Areas [Table Text Block]	December 31, December 31, December 31, (in thousands) 2021 2020 2019 Long-lived assets: United States $ 215,701 $ 215,721 $ 210,171 Europe 59,388 59,388 45,019 Japan 5,257 7,557 8,522 Total long-lived assets $ 280,346 $ 282,666 $ 263,712
Expenditures for Additions to Long-lived Assets by Geographic Region [Table Text Block]	Year Ended December 31, (in thousands) 2021 2020 2019 Expenditures for additions to long-lived assets: United States $ 26,698 $ 29,984 $ 45,123 Europe 7,378 16,574 14,743 Japan 133 452 2,364 Total expenditures for additions to long-lived assets $ 34,209 $ 47,010 $ 62,230
Depreciation and Amortization by Geographic Region [Table Text Block]	Year Ended December 31, (in thousands) 2021 2020 2019 Depreciation and Amortization: United States $ 31,642 $ 25,744 $ 24,767 Europe 7,101 5,024 4,746 Japan 1,745 1,826 1,351 Total depreciation and amortization $ 40,488 $ 32,594 $ 30,864
Operating Segments [Member]
Notes Tables
Revenue from External Customers by Geographic Areas [Table Text Block]	Year Ended December 31, (in thousands) 2021 2020 2019 Revenue: United States $ 384,458 $ 345,708 $ 360,205 Europe 90,399 74,796 82,805 Japan 13,241 13,891 15,718 Total revenue $ 488,098 $ 434,395 $ 458,728

Note 2 - Summary of Significa_2

Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Capitalized Computer Software, Net, Ending Balance	$ 49,400
Goodwill, Impairment Loss	0
Advertising Expense	11,600	$ 11,500	$ 13,000
Research and Development Expense, Total	$ 44,241	$ 36,940	$ 32,692
Building [Member]
Property, Plant and Equipment, Useful Life (Year)	39 years
Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)	3 years
Finite-Lived Intangible Asset, Useful Life (Year)	2 years
Minimum [Member] | Office Space, Manufacturing Facilities, and Certain Company Vehicles and Equipment [Member]
Lessee, Operating Lease, Term of Contract (Year)	1 year
Minimum [Member] | Equipment [Member]
Property, Plant and Equipment, Useful Life (Year)	3 years
Minimum [Member] | Office Furniture And Equipment [Member]
Property, Plant and Equipment, Useful Life (Year)	3 years
Minimum [Member] | Computer Equipment [Member]
Property, Plant and Equipment, Useful Life (Year)	3 years
Minimum [Member] | Land, Buildings and Improvements [Member]
Property, Plant and Equipment, Useful Life (Year)	10 years
Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)	39 years
Finite-Lived Intangible Asset, Useful Life (Year)	12 years
Maximum [Member] | Office Space, Manufacturing Facilities, and Certain Company Vehicles and Equipment [Member]
Lessee, Operating Lease, Term of Contract (Year)	8 years
Maximum [Member] | Equipment [Member]
Property, Plant and Equipment, Useful Life (Year)	15 years
Maximum [Member] | Office Furniture And Equipment [Member]
Property, Plant and Equipment, Useful Life (Year)	7 years
Maximum [Member] | Computer Equipment [Member]
Property, Plant and Equipment, Useful Life (Year)	5 years
Maximum [Member] | Land, Buildings and Improvements [Member]
Property, Plant and Equipment, Useful Life (Year)	39 years

Note 3 - Revenue - Disaggregati

Note 3 - Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue:
Revenue	$ 488,098	$ 434,395	$ 458,728
Injection Molding (Protomold) [Member]
Revenue:
Revenue	226,117	217,992	217,415
CNC Machining (Firstcut) [Member]
Revenue:
Revenue	166,811	131,587	155,473
3D Printing (Fineline) [Member]
Revenue:
Revenue	72,721	62,502	61,352
Sheet Metal [Member]
Revenue:
Revenue	20,397	18,838	21,000
Other Products [Member]
Revenue:
Revenue	2,052	3,476	3,488
UNITED STATES
Revenue:
Revenue	384,458	345,708	360,205
Europe [Member]
Revenue:
Revenue	90,399	74,796	82,805
JAPAN
Revenue:
Revenue	$ 13,241	$ 13,891	$ 15,718

Note 4 - Net Income Per Commo_3

Note 4 - Net Income Per Common Share (Details Textual)	12 Months Ended
	Dec. 31, 2021$ / shares
Antidilutive Securities Excluded from Computation of Net Income, Per Outstanding Unit, Amount (in dollars per share)	$ 113,043

Note 4 - Net Income Per Commo_4

Note 4 - Net Income Per Common Share - Computation of Basic and Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net income	$ 33,372	$ 50,867	$ 63,655
Basic - weighted-average shares outstanding: (in shares)	27,617,627	26,737,425	26,866,985
Employee stock options and other (in shares)	35,472	158,932	182,438
Diluted - weighted-average shares outstanding: (in shares)	27,653,099	26,896,357	27,049,423
Basic (in dollars per share)	$ 1.21	$ 1.90	$ 2.37
Diluted (in dollars per share)	$ 1.21	$ 1.89	$ 2.35

Note 5 - Business Combination_2

Note 5 - Business Combinations (Details Textual) - USD ($) $ in Thousands	Jan. 22, 2021	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Payments to Acquire Businesses, Net of Cash Acquired, Total			$ 127,413	$ 0	$ 0
Business Combination, Contingent Consideration, Liability, Total		$ 0	0
Acquired 3D Hubs [Member]
Business Combination, Consideration Transferred, Total	$ 294,100		294,122
Payments to Acquire Businesses, Net of Cash Acquired, Total	$ 127,400		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	$ 166,700		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, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles			(3,900)
Goodwill, Purchase Accounting Adjustments			5,500
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Contingent Consideration			3,300
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deferred Tax Liabilities			1,400
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Cash Paid			$ (300)
Acquired 3D Hubs [Member] | Cash [Member]
Payments to Acquire Businesses, Gross		$ 25,000
Acquired 3D Hubs [Member] | Common Stock [Member] | Maximum [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)	143,983
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	$ 27,800

Note 5 - Business Combination_3

Note 5 - Business Combinations - Allocation of Purchase Price for the Acquisition of Rapid (Details) - USD ($) $ in Thousands	Jan. 22, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Assets acquired:
Goodwill		$ 400,610	$ 128,752	$ 128,752
Liabilities assumed:
Net cash consideration		127,413	$ 0	$ 0
Acquired 3D Hubs [Member]
Assets acquired:
Current assets		2,497
Intangible assets		30,770
Goodwill		280,925
Other long-term assets		1,139
Total assets acquired		315,331
Liabilities assumed:
Current contingent consideration		7,093
Current liabilities		5,666
Long-term contingent consideration		6,507
Long-term deferred tax liabilities		1,688
Other long-term liabilities		255
Total liabilities assumed		21,209
Net assets acquired		294,122
Payments to Acquire Businesses, Gross		133,847
Cash acquired		(6,434)
Net cash consideration	$ 127,400	127,413
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable	166,700	166,709
Total purchase consideration	$ 294,100	$ 294,122

Note 6 - Goodwill and Other I_3

Note 6 - Goodwill and Other Intangible Assets (Details Textual) $ in Thousands, € in Millions	Jan. 22, 2021USD ($)	Jan. 22, 2021EUR (€)	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Goodwill, Acquired During Period			$ 280,925	$ 0
Amortization of Intangible Assets, Total			6,200	3,000	$ 3,500
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax, Total			900	0	$ 0
Europe [Member]
Goodwill, Acquired During Period			129,649	0
UNITED STATES
Goodwill, Acquired During Period			151,276	$ 0
Acquired 3D Hubs [Member]
Goodwill, Acquired During Period			$ 280,900
Acquired 3D Hubs [Member] | Europe [Member]
Goodwill, Acquired During Period | €		€ 106.5
Acquired 3D Hubs [Member] | UNITED STATES
Goodwill, Acquired During Period	$ 151,300

Note 6 - Goodwill and Other I_4

Note 6 - Goodwill and Other Intangible Assets - Changes in Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Goodwill, balance as of the beginning of the period	$ 128,752	$ 128,752
Goodwill acquired during the period	280,925	0
Goodwill, foreign currency translation adjustment	(9,067)
Goodwill, balance as of the end of the period	400,610	128,752
UNITED STATES
Goodwill, balance as of the beginning of the period	123,883	123,883
Goodwill acquired during the period	151,276	0
Goodwill, foreign currency translation adjustment	0
Goodwill, balance as of the end of the period	275,159	123,883
Europe [Member]
Goodwill, balance as of the beginning of the period	4,239	4,239
Goodwill acquired during the period	129,649	0
Goodwill, foreign currency translation adjustment	(9,067)
Goodwill, balance as of the end of the period	124,821	4,239
JAPAN
Goodwill, balance as of the beginning of the period	630	630
Goodwill acquired during the period	0	0
Goodwill, foreign currency translation adjustment	0
Goodwill, balance as of the end of the period	$ 630	$ 630

Note 6 - Goodwill and Other I_5

Note 6 - Goodwill and Other Intangible Assets - Intangible Assets Other Than Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Gross	$ 54,337	$ 24,499
Accumulated Amortization	(16,339)	(10,149)
Net	37,998	14,350
Accumulated Amortization	$ 16,339	10,149
Minimum [Member]
Useful Life (Year)	2 years
Maximum [Member]
Useful Life (Year)	12 years
Marketing-Related Intangible Assets [Member]
Gross	$ 930	930
Accumulated Amortization	(713)	(620)
Net	$ 217	310
Useful Life (Year)	10 years
Weighted average useful life remaining (Year)	2 years 3 months 18 days
Accumulated Amortization	$ 713	620
Noncompete Agreements [Member]
Gross	842	270
Accumulated Amortization	(363)	(238)
Net	$ 479	32
Weighted average useful life remaining (Year)	2 years 10 months 24 days
Accumulated Amortization	$ 363	238
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	(5,014)	(3,645)
Net	$ 8,215	9,584
Useful Life (Year)	10 years
Weighted average useful life remaining (Year)	6 years 6 months
Accumulated Amortization	$ 5,014	3,645
Software Platform [Member]
Gross	26,725	0
Accumulated Amortization	2,262	0
Net	$ 24,463	0
Useful Life (Year)	12 years
Weighted average useful life remaining (Year)	11 years 1 month 6 days
Accumulated Amortization	$ (2,262)	0
Trade Names [Member]
Gross	359	0
Accumulated Amortization	114	0
Net	$ 245	0
Useful Life (Year)	3 years
Weighted average useful life remaining (Year)	2 years 1 month 6 days
Accumulated Amortization	$ (114)	0
Customer Relationships [Member]
Gross	12,252	10,070
Accumulated Amortization	(7,873)	(5,646)
Net	$ 4,379	4,424
Weighted average useful life remaining (Year)	1 year 9 months 18 days
Accumulated Amortization	$ 7,873	$ 5,646
Customer Relationships [Member] | Minimum [Member]
Useful Life (Year)	3 years
Customer Relationships [Member] | Maximum [Member]
Useful Life (Year)	9 years

Note 6 - Goodwill and Other I_6

Note 6 - Goodwill and Other Intangible Assets - Estimated Aggregated Amortization Expense (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
2022	$ 6,172
2023	5,968
2024	3,790
2025	3,690
2026	3,586
Thereafter	14,792
Total estimated amortization expense	$ 37,998	$ 14,350

Note 7 - Fair Value Measureme_3

Note 7 - Fair Value Measurements (Details Textual) $ in Thousands	Dec. 31, 2021USD ($)
Business Combination, Contingent Consideration, Liability, Total	$ 0

Note 7 - Fair Value Measureme_4

Note 7 - Fair Value Measurements - Fair Value of Financial Assets Measured on a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Marketable securities	$ 25,920
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Cash and cash equivalents	65,637	$ 72,225
Marketable securities	7,602	0
Total	73,531	127,603
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]
Cash and cash equivalents	292	55,378
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Cash and cash equivalents	0	0
Marketable securities	18,318	0
Total	18,318	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
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Money Market Funds [Member]
Cash and cash equivalents	$ 0	$ 0

Note 8 - Marketable Securitie_2

Note 8 - Marketable Securities - Short-term and Long-term Available for Sale Securities (Details) $ in Thousands	Dec. 31, 2021USD ($)
Amortized Cost	$ 26,039
Unrealized Gains	7
Unrealized Losses	(126)
Fair Value	25,920
Bank Time Deposits [Member]
Amortized Cost	1,687
Unrealized Gains	7
Unrealized Losses	0
Fair Value	1,694
US Government Agencies Debt Securities [Member]
Amortized Cost	2,500
Unrealized Gains	0
Unrealized Losses	(12)
Fair Value	2,488
Corporate Debt Securities [Member]
Amortized Cost	9,303
Unrealized Gains	0
Unrealized Losses	(44)
Fair Value	9,259
US States and Political Subdivisions Debt Securities [Member]
Amortized Cost	12,549
Unrealized Gains	0
Unrealized Losses	(70)
Fair Value	12,479
Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Amortized Cost	0
Unrealized Gains	0
Unrealized Losses	0
Fair Value	$ 0

Note 8 - Marketable Securitie_3

Note 8 - Marketable Securities - Short-term and Long-term Held-to-Maturity Securities (Details) $ in Thousands	Dec. 31, 2020USD ($)
Amortized Cost	$ 93,445
Unrealized Gains	393
Unrealized Losses	(23)
Fair Value	93,815
Bank Time Deposits [Member]
Amortized Cost	5,395
Unrealized Gains	93
Unrealized Losses	0
Fair Value	5,488
US Government Agencies Debt Securities [Member]
Amortized Cost	18,500
Unrealized Gains	6
Unrealized Losses	(10)
Fair Value	18,496
Corporate Debt Securities [Member]
Amortized Cost	42,048
Unrealized Gains	211
Unrealized Losses	(11)
Fair Value	42,248
US States and Political Subdivisions Debt Securities [Member]
Amortized Cost	25,003
Unrealized Gains	83
Unrealized Losses	(2)
Fair Value	25,084
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 8 - Marketable Securitie_4

Note 8 - Marketable Securities - Balance of Held-to-maturity Debt Securities by Contractual Maturity (Details) $ in Thousands	Dec. 31, 2021USD ($)
Due in one year or less	$ 11,580
Due after one year through five years	14,340
Total marketable securities	$ 25,920

Note 9 - Property and Equipme_3

Note 9 - Property and Equipment (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Depreciation, Total	$ 34.3	$ 29.6	$ 27.4

Note 9 - Property and Equipme_4

Note 9 - Property and Equipment - Components of Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Land	$ 15,009	$ 14,028
Buildings and improvements	107,241	77,285
Machinery and equipment	234,900	221,301
Computer hardware and software	81,889	79,207
Leasehold improvements	8,373	7,821
Construction in progress	14,489	33,780
Total	461,901	433,422
Accumulated depreciation and amortization	(181,555)	(150,756)
Property and equipment, net	$ 280,346	$ 282,666	$ 263,712

Note 10 - Inventory - Inventory

Note 10 - Inventory - Inventory (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Total inventory	$ 13,474	$ 11,122
Allowance for obsolescence	(313)	(260)
Inventory, net of allowance	$ 13,161	$ 10,862

Note 11 - Financing Obligatio_2

Note 11 - Financing Obligations (Details Textual) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Long-term Line of Credit, Total	$ 0	$ 0

Note 12 - Employee Benefit Pl_2

Note 12 - Employee Benefit Plans (Details Textual) - 401(k) Retirement Plan [Member] $ in Millions	12 Months Ended
	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
UNITED STATES
Minimum Number Of Employee Working Hours Required To Be Eligible To Participate In 401K Plan	20
Minimum Service Period Of Employees To Avail Benefit Under Defined Contribution Benefit Plan (Month)	3 months
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	50.00%
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 3.7	$ 3.3	$ 3.1
Foreign Plan [Member]
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 0.4	$ 0.5	$ 0.3

Note 13 - Stock-based Compens_3

Note 13 - Stock-based Compensation (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	$ 3.8	$ 5.4	$ 0.9
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term (Year)	6 years 8 months 12 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value	$ 0.1
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term (Year)	5 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	$ 0.1
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value	$ 2.1	$ 1.8	$ 1.5
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%
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture, Total (in shares)	67,729	42,235
Employee Stock Purchase Plan, Weighted Average Purchase Price of Shares Purchased (in shares)	61.96	85.85
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)	1,058,866
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	$ 4.3
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)	2 years 7 months 6 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	$ 26
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)	2 years 4 months 24 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	$ 0.8
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)	1 year 9 months 18 days
Percentage of Target Number Capable of Being Earned and Vesting, Lower Limit	0.00%
Percentage of Target Number Capable of Being Earned and Vesting, Upper Limit	150.00%
Long-Term Incentive Plan 2012 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)	10 years

Note 13 - Stock-based Compens_4

Note 13 - Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Allocated share-based compensation expense	$ 19,095	$ 14,673	$ 10,781
Cost of Sales [Member]
Allocated share-based compensation expense	2,595	2,451	2,056
Selling and Marketing Expense [Member]
Allocated share-based compensation expense	3,736	3,121	2,632
Research and Development Expense [Member]
Allocated share-based compensation expense	2,833	2,440	1,851
General and Administrative Expense [Member]
Allocated share-based compensation expense	9,931	6,661	4,242
Stock Options, Restricted Stock, and Other [Member]
Allocated share-based compensation expense	17,553	13,327	9,591
ESPP [Member]
Allocated share-based compensation expense	$ 1,542	$ 1,346	$ 1,190

Note 13 - Stock-based Compens_5

Note 13 - Stock-based Compensation - Assumptions Used in the Black-Scholes Option Pricing Model (Details) - Share-based Payment Arrangement, Option [Member] - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Expected life (Year)	6 years 3 months	6 years 3 months	6 years 3 months
Expected dividend yield	0.00%	0.00%	0.00%
Weighted average grant date fair value (in dollars per share)	$ 128.14	$ 45.32	$ 47.84
Minimum [Member]
Risk-free interest rate	0.80%	0.50%	2.35%
Expected volatility	45.28%	42.40%	42.52%
Maximum [Member]
Risk-free interest rate	1.12%	1.47%	2.58%
Expected volatility	45.53%	43.83%	42.74%

Note 13 - Stock-based Compens_6

Note 13 - Stock-based Compensation - Stock Option Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Options outstanding (in shares)	229,531	276,266	252,616
Options outstanding, weighted-average exercise price (in dollars per share)	$ 86.46	$ 72.38	$ 64.71
Granted (in shares)	57,901	60,065	53,708
Granted, weighted-average exercise price (in dollars per share)	$ 128.14	$ 105.79	$ 105.81
Exercised (in shares)	(28,991)	(68,958)	(16,079)
Exercised, weighted-average exercise price (in dollars per share)	$ 58.78	$ 57	$ 48.67
Cancelled (in shares)	(25,057)	(37,842)	(13,979)
Cancelled, weighted-average exercise price (in dollars per share)	$ 109.31	$ 67.92	$ 89.50
Options outstanding (in shares)	233,384	229,531	276,266
Options outstanding, weighted-average exercise price (in dollars per share)	$ 97.78	$ 86.46	$ 72.38
Options exercisable (in shares)	115,700
Options exercisable, weighted-average exercise price (in dollars per share)	$ 81.30

Note 13 - Stock-based Compens_7

Note 13 - Stock-based Compensation - Information about Stock Options Outstanding (Details) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Options outstanding, vested and expected to vest, number outstanding (in shares)	233,384	229,531	276,266	252,616
Options outstanding, vested and expected to vest, weighted average exercise price (in dollars per share)	$ 97.78	$ 86.46	$ 72.38	$ 64.71
Exercise Price Range One [Member]
Range of exercise prices, lower limit (in dollars per share)	$ 7.76
Options outstanding, vested and expected to vest, number outstanding (in shares)	4,624
Range of exercise prices, upper limit (in dollars per share)	$ 31.43
Options outstanding, vested and expected to vest, weighted average remaining contractual life (Year)	4 months 6 days
Options outstanding, vested and expected to vest, weighted average exercise price (in dollars per share)	$ 30.58
Options exercisable, number exercisable (in shares)	4,624
Options exercisable, weighted average exercise price (in dollars per share)	$ 30.58
Exercise Price Range Two [Member]
Range of exercise prices, lower limit (in dollars per share)	$ 31.44
Options outstanding, vested and expected to vest, number outstanding (in shares)	50,159
Range of exercise prices, upper limit (in dollars per share)	$ 66.87
Options outstanding, vested and expected to vest, weighted average remaining contractual life (Year)	3 years 6 months 29 days
Options outstanding, vested and expected to vest, weighted average exercise price (in dollars per share)	$ 57.13
Options exercisable, number exercisable (in shares)	45,986
Options exercisable, weighted average exercise price (in dollars per share)	$ 57.02
Exercise Price Range Three [Member]
Range of exercise prices, lower limit (in dollars per share)	$ 66.88
Options outstanding, vested and expected to vest, number outstanding (in shares)	41,586
Range of exercise prices, upper limit (in dollars per share)	$ 96.20
Options outstanding, vested and expected to vest, weighted average remaining contractual life (Year)	7 years 9 months 25 days
Options outstanding, vested and expected to vest, weighted average exercise price (in dollars per share)	$ 89.95
Options exercisable, number exercisable (in shares)	9,570
Options exercisable, weighted average exercise price (in dollars per share)	$ 71.68
Exercise Price Range Four [Member]
Range of exercise prices, lower limit (in dollars per share)	$ 96.21
Options outstanding, vested and expected to vest, number outstanding (in shares)	137,015
Range of exercise prices, upper limit (in dollars per share)	$ 123.10
Options outstanding, vested and expected to vest, weighted average remaining contractual life (Year)	7 years 8 months 1 day
Options outstanding, vested and expected to vest, weighted average exercise price (in dollars per share)	$ 117.31
Options exercisable, number exercisable (in shares)	55,520
Options exercisable, weighted average exercise price (in dollars per share)	$ 107.28

Note 13 - Stock-based Compens_8

Note 13 - Stock-based Compensation - Restricted Stock Options (Details) - Restricted Stock [Member] - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restricted stock (in shares)	307,199	314,973	323,921
Restricted stock, weighted-average grant date fair value (in dollars per share)	$ 98.87	$ 89.55	$ 79.85
Granted (in shares)	205,996	108,179	115,471
Granted, weighted-average grant date fair value (in dollars per share)	$ 123.61	$ 111.76	$ 106.35
Restrictions lapsed (in shares)	(115,908)	(101,941)	(92,597)
Restrictions lapsed, weighted-average grant date fair value (in dollars per share)	$ 91.26	$ 84.70	$ 77.25
Forfeited (in shares)	(53,505)	(14,012)	(31,822)
Forfeited, weighted-average grant date fair value (in dollars per share)	$ 128.05	$ 94.24	$ 87.58
Restricted stock (in shares)	343,782	307,199	314,973
Restricted stock, weighted-average grant date fair value (in dollars per share)	$ 111.79	$ 98.87	$ 89.55

Note 13 - Stock-based Compens_9

Note 13 - Stock-based Compensation - Performance Stock (Details) - Performance Shares [Member] - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Performance stock (in shares)	19,956	9,383	52,140
Restricted stock, weighted-average grant date fair value (in dollars per share)	$ 118.66	$ 58.35	$ 76.54
Granted (in shares)	15,078	19,956	21,434
Granted, weighted-average grant date fair value (in dollars per share)	$ 203.64	$ 118.66	$ 104.99
Restrictions lapsed (in shares)	0	(7,113)	0
Restrictions lapsed, weighted-average grant date fair value (in dollars per share)	$ 0	$ 58.35	$ 0
Performance change (in shares)	(10,366)	0	(61,816)
Performance change, weighted-average grant date fair value (in dollars per share)	$ 192.95	$ 0	$ 88.06
Forfeited (in shares)	(7,829)	(2,270)	(2,375)
Forfeited, weighted-average grant date fair value (in dollars per share)	$ 113.91	$ 58.35	$ 105.37
Granted (in shares)	15,078	19,956	21,434
Restrictions lapsed (in shares)	0	(7,113)	0
Performance change, weighted-average grant date fair value (in dollars per share)	$ 192.95	$ 0	$ 88.06
Forfeited (in shares)	(7,829)	(2,270)	(2,375)
Performance stock (in shares)	16,839	19,956	9,383
Restricted stock, weighted-average grant date fair value (in dollars per share)	$ 115.56	$ 118.66	$ 58.35

Note 13 - Stock-based Compen_10

Note 13 - Stock-based Compensation - Assumptions Used in the Valuation of Performance Stock (Details) - Performance Shares [Member]	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Expected life (Year)	6 years	6 years	6 years
Expected dividend yield	0.00%	0.00%	0.00%
Minimum [Member]
Risk-free interest rate	0.06%	0.12%	1.59%
Expected volatility	53.44%	50.85%	42.63%
Maximum [Member]
Risk-free interest rate	0.17%	0.17%	2.35%
Expected volatility	65.53%	59.99%	53.57%

Note 14 - Leases - Balance Shee

Note 14 - Leases - Balance Sheet Information (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Operating lease assets	$ 5,578	$ 9,855
Current operating lease liabilities	3,298	3,272
Long-term operating lease liabilities	2,245	7,586
Total operating lease liabilities	5,543	10,858
Finance lease assets	1,898	2,396
Current finance lease liabilities	550	552
Long-term finance lease liabilities	1,351	1,919
Total finance lease liabilities	$ 1,901	$ 2,471

Note 14 - Leases - Lease Expens

Note 14 - Leases - Lease Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating lease cost	$ 3,391	$ 4,191
Amortization of right-of-use assets	498	143
Interest on lease obligations	9	2
Variable lease cost	719	989
Total lease cost	4,617	5,325
Operating cash flows from operating leases	10,477	4,426
Operating cash flows from finance leases	9	2
Financing cash flows from finance leases	552	154	$ 0
Lease assets obtained in exchange for new operating lease liabilities	5,293	1,506
Lease assets obtained in exchange for new financing lease liabilities	$ 0	$ 2,523

Note 14 - Leases - Maturities o

Note 14 - Leases - Maturities of Operating Lease Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
2022, operating lease	$ 2,550
2022, finance lease	561
2023, operating lease	1,308
2023, finance lease	1,352
2024, operating lease	751
2024, finance lease	0
2025, operating lease	711
2025, finance lease	0
2026, operating lease	344
2026, finance lease	0
After 2027, operating lease	0
After 2027, finance lease	0
Total future minimum lease payments, operating lease	5,664
Total future minimum lease payments, finance lease	1,913
Less interest, operating lease	(121)
Less interest, finance lease	(12)
Present value of lease liabilities, operating lease	5,543	$ 10,858
Present value of lease liabilities	$ 1,901	$ 2,471

Note 14 - Leases - Weighted Ave

Note 14 - Leases - Weighted Average Remaining Terms and Discount Rates (Details)	Dec. 31, 2021	Dec. 31, 2020
Weighted Average Remaining Lease Term - operating leases (years) (Year)	3 years 1 month 6 days	4 years 4 months 24 days
Weighted Average Remaining Lease Term - finance leases (years) (Year)	1 year 6 months
Weighted Average Discount Rate - operating leases	1.60%	2.60%
Weighted Average Discount Rate - finance leases	0.40%	0.50%

Note 15 - Accumulated Other C_3

Note 15 - Accumulated Other Comprehensive Income (Loss) - Other Comprehensive Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Balance at beginning of period	$ 644,356	$ 585,790	$ 541,497
Balance at end of period	828,493	644,356	585,790
AOCI Attributable to Parent [Member]
Balance at beginning of period	(3,420)	(7,018)	(8,492)
Balance at end of period	(16,817)	(3,420)	(7,018)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Other comprehensive (loss) income before reclassifications	(13,278)	3,598	1,474
Net current-period other comprehensive (loss) income	(13,278)	3,598	1,474
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
Other comprehensive (loss) income before reclassifications	(119)	0	0
Net current-period other comprehensive (loss) income	$ (119)	$ 0	$ 0

Note 16 - Income Taxes (Details

Note 16 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Expense (Benefit), Total	$ 6,812	$ 12,078	$ 17,538
Effective Income Tax Rate Reconciliation, Percent, Total	17.00%	19.20%	21.60%
Effective Income Tax Rate Continuing Operations Increase (Decrease) During the Period	2.20%
Increase (Decrease) in Income Taxes Payable, CARES Act	$ (2,900)
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries	0
Undistributed Earnings of Foreign Subsidiaries	2,700
Operating Loss Carryforwards, Total	$ 14,000
Operating Loss Carryforwards, Expiration Period (Year)	10 years
Deferred Tax Assets, Valuation Allowance, Total	$ 13,999	$ 9,138
Unrecognized Tax Benefits, Ending Balance	$ 4,364	$ 4,830	$ 4,598
GERMANY
Operating Loss Carryforwards, Percentage of Taxable Income	60.00%
NETHERLANDS
Operating Loss Carryforwards, Percentage of Taxable Income	50.00%

Note 16 - Income Taxes - Compon

Note 16 - Income Taxes - Components of Income (Loss) Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Domestic	$ 42,449	$ 58,551	$ 74,841
Foreign	(2,265)	4,394	6,352
Income before income taxes	$ 40,184	$ 62,945	$ 81,193

Note 16 - Income Taxes - Signif

Note 16 - Income Taxes - Significant Components of Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current:
Federal	$ 5,552	$ 2,128	$ 6,991
State	975	1,136	2,882
Foreign	(64)	1,241	1,544
Deferred
Federal	(377)	6,904	5,121
State	(814)	(431)	269
Foreign	(1,181)	210	(809)
Valuation Allowance	2,721	890	1,540
Total	$ 6,812	$ 12,078	$ 17,538

Note 16 - Income Taxes - Reconc

Note 16 - Income Taxes - Reconciliation of Federal Statutory Income Tax Rate to Effective Tax Rate (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Federal tax statutory rate	21.00%	21.00%	21.00%
State tax (net of federal benefit)	2.10%	2.10%	2.10%
Share based compensation	(2.30%)	(1.30%)	(0.50%)
Valuation allowance against deferred tax assets	8.90%	2.00%	1.40%
Contingent consideration reduction	(7.00%)	0.00%	0.00%
Research and development credit	(4.00%)	(3.70%)	(2.80%)
Foreign rate differential	(2.20%)	(0.80%)	(0.30%)
Tax reserves	(1.00%)	1.40%	1.10%
Provision to return difference	(0.70%)	(1.40%)	0.00%
Miscellaneous	2.20%	(0.10%)	(0.40%)
Total	17.00%	19.20%	21.60%

Note 16 - Income Taxes - Sign_2

Note 16 - Income Taxes - Significant Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Accrued expenses	$ 2,511	$ 2,155
Leases	1,830	3,598
Warrants and stock options	4,271	3,356
Intangible assets	0	1,693
Inventories	205	172
Research and development credit	2,126	1,661
Other assets	1,111	129
Net operating loss	14,046	6,647
Less valuation allowance	(13,999)	(9,138)
Total deferred tax assets	12,101	10,273
Deferred tax liabilities:
Depreciation	(31,897)	(32,671)
Goodwill	(9,872)	(7,858)
Intangible assets	(4,394)	0
Leases	(1,830)	(3,598)
Total deferred tax liabilities	(47,993)	(44,127)
Net deferred tax liability	$ (35,892)	$ (33,854)

Note 16 - Income Taxes - Reco_2

Note 16 - Income Taxes - Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Balance	$ 4,830	$ 4,598
Additions for tax positions of current year	491	324
Additions for tax positions of prior years	781	475
Decrease related to expiration of statutes of limitations	(1,738)	(567)
Balance	$ 4,364	$ 4,830

Note 18 - Segment Reporting - R

Note 18 - Segment Reporting - Revenue From Operations by Reportable Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue	$ 488,098	$ 434,395	$ 458,728
Operating Segments [Member]
Revenue	488,098	434,395	458,728
Operating Segments [Member] | United States Segment [Member]
Revenue	384,458	345,708	360,205
Operating Segments [Member] | Europe Segment [Member]
Revenue	90,399	74,796	82,805
Operating Segments [Member] | Japan Segment [Member]
Revenue	$ 13,241	$ 13,891	$ 15,718

Note 18 - Segment Reporting - I

Note 18 - Segment Reporting - Income From Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income from operations	$ 40,342	$ 59,836	$ 79,856
Operating Segments [Member] | United States Segment [Member]
Income from operations	98,001	98,762	108,594
Operating Segments [Member] | Europe Segment [Member]
Income from operations	730	11,707	15,077
Operating Segments [Member] | Corporate Unallocated and Japan Segment[Member]
Income from operations	$ (58,389)	$ (50,633)	$ (43,815)

Note 18 - Segment Reporting - L

Note 18 - Segment Reporting - Long-lived Assets by Geographic Region (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Long-lived assets	$ 280,346	$ 282,666	$ 263,712
Operating Segments [Member] | United States Segment [Member]
Long-lived assets	215,701	215,721	210,171
Operating Segments [Member] | Europe Segment [Member]
Long-lived assets	59,388	59,388	45,019
Operating Segments [Member] | Japan Segment [Member]
Long-lived assets	$ 5,257	$ 7,557	$ 8,522

Note 18 - Segment Reporting - E

Note 18 - Segment Reporting - Expenditures for Additions to Long-lived Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Expenditures for additions to long-lived assets	$ 34,209	$ 47,010	$ 62,230
UNITED STATES
Expenditures for additions to long-lived assets	26,698	29,984	45,123
Europe [Member]
Expenditures for additions to long-lived assets	7,378	16,574	14,743
JAPAN
Expenditures for additions to long-lived assets	$ 133	$ 452	$ 2,364

Note 18 - Segment Reporting - D

Note 18 - Segment Reporting - Depreciation and Amortization (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Depreciation and amortization	$ 40,488	$ 32,594	$ 30,864
UNITED STATES
Depreciation and amortization	31,642	25,744	24,767
Europe [Member]
Depreciation and amortization	7,101	5,024	4,746
JAPAN
Depreciation and amortization	$ 1,745	$ 1,826	$ 1,351