Proto Labs (PRLB) 10-Q 10 May 21 2021 Q1 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	3 Months Ended
	Mar. 31, 2021	May 05, 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	Q1
Document Fiscal Year Focus	2021
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 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 Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		27,689,746

Consolidated Balance Sheets (Cu

Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 43,774	$ 127,603
Short-term marketable securities	19,592	34,088
Accounts receivable, net of allowance for doubtful accounts of $2,011 and $1,781 as of March 31, 2021 and December 31, 2020, respectively	74,666	57,877
Inventory	9,918	10,862
Income taxes receivable	1,763	540
Prepaid expenses and other current assets	8,803	11,032
Total current assets	158,516	242,002
Property and equipment, net	279,901	282,666
Goodwill	399,426	128,752
Other intangible assets, net	46,883	14,350
Long-term marketable securities	29,760	59,357
Operating lease assets	12,819	9,855
Finance lease assets	2,271	2,396
Other long-term assets	4,872	4,826
Total assets	934,448	744,204
Current liabilities
Accounts payable	21,846	18,248
Accrued compensation	11,745	11,989
Accrued liabilities and other	16,705	16,193
Current contingent consideration	5,221	0
Current operating lease liabilities	2,732	3,272
Current finance lease liabilities	553	552
Income taxes payable	1,047	0
Total current liabilities	59,849	50,254
Long-term contingent consideration	4,789	0
Long-term operating lease liabilities	11,534	7,586
Long-term finance lease liabilities	1,779	1,919
Long-term deferred tax liabilities	36,899	33,854
Other long-term liabilities	6,167	6,235
Total liabilities	121,017	99,848
Shareholders' equity
Preferred stock, $0.001 par value, authorized 10,000,000 shares; issued and outstanding 0 shares as of each of March 31, 2021 and December 31, 2020	0	0
Common stock, $0.001 par value, authorized 150,000,000 shares; issued and outstanding 27,689,746 and 26,776,796 shares as of March 31, 2021 and December 31, 2020, respectively	28	27
Additional paid-in capital	456,886	284,848
Retained earnings	366,613	362,901
Accumulated other comprehensive loss	(10,096)	(3,420)
Total shareholders' equity	813,431	644,356
Total liabilities and shareholders' equity	$ 934,448	$ 744,204

Consolidated Balance Sheets (_2

Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Allowance for doubtful accounts	$ 2,011	$ 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)	27,689,746	26,776,796
Common stock, shares outstanding (in shares)	27,689,746	26,776,796

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statements of Operations:
Revenue	$ 116,126	$ 115,108
Cost of revenue	60,796	57,008
Gross profit	55,330	58,100
Operating expenses
Marketing and sales	19,480	18,180
Research and development	12,181	8,987
General and administrative	19,408	14,108
Total operating expenses	51,069	41,275
Income from operations	4,261	16,825
Other (loss) income, net	(313)	1,054
Income before income taxes	3,948	17,879
Provision for income taxes	236	3,895
Net income	$ 3,712	$ 13,984
Net income per share:
Basic (in dollars per share)	$ 0.14	$ 0.52
Diluted (in dollars per share)	$ 0.13	$ 0.52
Shares used to compute net income per share:
Basic (in shares)	27,464,136	26,776,806
Diluted (in shares)	27,698,195	26,929,640
Comprehensive (Loss) Income (net of tax)
Comprehensive (loss) income	$ (2,964)	$ 11,004

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Dec. 31, 2019	26,786,459
Balance at Dec. 31, 2019	$ 27	$ 268,059	$ 324,722	$ (7,018)	$ 585,790
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares)	23,525
Common shares issued on exercise of options and other, net of shares withheld for tax obligations	$ 0	(902)	0	0	(902)
Stock-based compensation expense	$ 0	3,033	0	0	3,033
Repurchases of common stock (in shares)	(161,460)
Repurchases of common stock	$ 0	(1,616)	(9,569)	0	(11,185)
Net income	0	0	13,984	0	13,984
Other comprehensive loss
Foreign currency translation adjustment	$ 0	0	0	(2,980)	(2,980)
Comprehensive (loss) income					11,004
Balance (in shares) at Dec. 31, 2019	26,786,459
Balance at Dec. 31, 2019	$ 27	268,059	324,722	(7,018)	585,790
Other comprehensive loss
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares)	23,525
Common shares issued on exercise of options and other, net of shares withheld for tax obligations	$ 0	(902)	0	0	(902)
Stock-based compensation expense	$ 0	3,033	0	0	3,033
Repurchases of common stock (in shares)	(161,460)
Repurchases of common stock	$ 0	(1,616)	(9,569)	0	(11,185)
Net income	$ 0	0	13,984	0	13,984
Balance (in shares) at Mar. 31, 2020	26,648,524
Balance at Mar. 31, 2020	$ 27	268,574	329,137	(9,998)	$ 587,740
Balance (in shares) at Dec. 31, 2020	26,776,796				26,776,796
Balance at Dec. 31, 2020	$ 27	284,848	362,901	(3,420)	$ 644,356
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares)	48,955
Common shares issued on exercise of options and other, net of shares withheld for tax obligations	$ 0	(290)	0	0	(290)
Common shares issued for 3D Hubs acquisition (in shares)	863,995
Common shares issued for 3D Hubs acquisition	$ 1	166,708	0	0	166,709
Stock-based compensation expense	$ 0	5,620	0	0	5,620
Repurchases of common stock (in shares)	0
Repurchases of common stock	$ 0	0	0	0	0
Net income	0	0	3,712	0	3,712
Other comprehensive loss
Foreign currency translation adjustment	0	0	0	(6,842)	(6,842)
Net unrealized gains (losses) on investments in securities	$ 0	0	0	166	166
Comprehensive (loss) income					$ (2,964)
Balance (in shares) at Dec. 31, 2020	26,776,796				26,776,796
Balance at Dec. 31, 2020	$ 27	284,848	362,901	(3,420)	$ 644,356
Other comprehensive loss
Common shares issued on exercise of options and other, net of shares withheld for tax obligations (in shares)	48,955
Common shares issued on exercise of options and other, net of shares withheld for tax obligations	$ 0	(290)	0	0	(290)
Stock-based compensation expense	$ 0	5,620	0	0	5,620
Repurchases of common stock (in shares)	0
Repurchases of common stock	$ 0	0	0	0	0
Net income	$ 0	0	3,712	0	$ 3,712
Balance (in shares) at Mar. 31, 2021	27,689,746				27,689,746
Balance at Mar. 31, 2021	$ 28	$ 456,886	$ 366,613	$ (10,096)	$ 813,431

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating activities
Net income	$ 3,712	$ 13,984
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	10,059	7,958
Stock-based compensation expense	5,620	3,033
Deferred taxes	(69)	3,392
Amortization of marketable securities	137	55
Realized gain on available-sale-securities	(166)	0
Other	155	(644)
Changes in operating assets and liabilities:
Accounts receivable	(14,558)	(5,084)
Inventories	917	(537)
Prepaid expenses and other	2,696	(1,240)
Income taxes	(183)	(841)
Accounts payable	669	1,739
Accrued liabilities and other	(2,564)	595
Net cash provided by operating activities	6,425	22,410
Investing activities
Purchases of property, equipment and other capital assets	(6,546)	(13,421)
Cash used for acquisitions, net of cash acquired	(127,709)	0
Purchases of other assets and investments	0	(3,000)
Purchases of marketable securities	(8,227)	(37,629)
Proceeds from sales of marketable securities	45,194	0
Proceeds from maturities of marketable securities	7,155	10,700
Net cash used in investing activities	(90,133)	(43,350)
Financing activities
Proceeds from exercises of stock options	1,704	135
Purchases of shares withheld for tax obligations	(1,994)	(1,048)
Repurchases of common stock	0	(11,185)
Principal repayments of finance lease obligations	(137)	0
Net cash used in financing activities	(427)	(12,098)
Effect of exchange rate changes on cash and cash equivalents	306	(282)
Net decrease in cash and cash equivalents	(83,829)	(33,320)
Cash and cash equivalents, beginning of period	127,603	125,225
Cash and cash equivalents, end of period	$ 43,774	$ 91,905

Note 1 - Basis of Presentation

Note 1 - Basis of Presentation	3 Months Ended
	Mar. 31, 2021
Notes to Financial Statements
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	Note 1 The unaudited interim Consolidated Financial Statements of Proto Labs, Inc. (Protolabs, the Company, we, us or our) have been prepared in accordance with accounting principles generally accepted in the United States of America (U.S. GAAP) for interim financial information and with the instructions to Form 10 10 X. not may The preparation of the financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues, expenses, and the related disclosures at the date of the financial statements and during the reporting period. Actual results could materially differ from these estimates. For further information, refer to the audited Consolidated Financial Statements and Notes thereto included in the Company’s Annual Report on Form 10 December 31, 2020 February 19, 2021. The accompanying Consolidated Balance Sheet as of December 31, 2020 not 10 10 February 19, 2021

Note 2 - Recent Accounting Pron

Note 2 - Recent Accounting Pronouncements	3 Months Ended
	Mar. 31, 2021
Notes to Financial Statements
Significant Accounting Policies [Text Block]	Note 2 Recently Adopted Accounting Pronouncements In December 2019, 2019 12, Income Taxes (Topic 740 2019 12 2019 12 2019 12 December 15, 2020, 2019 12 January 1, 2021 no

Note 3 - Net Income Per Common

Note 3 - Net Income Per Common Share	3 Months Ended
	Mar. 31, 2021
Notes to Financial Statements
Earnings Per Share [Text Block]	Note 3 Basic net income per share is computed based on the weighted-average number of common shares outstanding. Diluted net income per share is computed based on the weighted-average number of common shares outstanding, increased by the number of additional shares that would have been outstanding had potentially dilutive common shares been issued and reduced by the number of shares the Company could have repurchased from the proceeds from issuance of the potentially dilutive shares. Potentially dilutive shares of common stock include stock options, restricted stock units and restricted stock awards granted under stock-based compensation plans and shares committed to be purchased under the employee stock purchase plan. Performance stock units are excluded from the calculation of dilutive potential common shares until the performance conditions have been satisfied. The table below sets forth the computation of basic and diluted net income per share: Three Months Ended March 31, (in thousands, except share and per share amounts) 2021 2020 Net income $ 3,712 $ 13,984 Basic - weighted-average shares outstanding: 27,464,136 26,776,806 Effect of dilutive securities: Employee stock options and other 234,059 152,834 Diluted - weighted-average shares outstanding: 27,698,195 26,929,640 Net income per share: Basic $ 0.14 $ 0.52 Diluted $ 0.13 $ 0.52

Note 4 - Business Combinations

Note 4 - Business Combinations	3 Months Ended
	Mar. 31, 2021
Notes to Financial Statements
Business Combination Disclosure [Text Block]	Note 4 On January 22, 2021, 3D “3D 2021 2022, 3D 240 The fair value of the consideration paid for this acquisition has been allocated on a preliminary basis to the assets purchased and liabilities assumed based on their estimated fair values as of the acquisition date, with any excess recorded as goodwill. The goodwill associated with the acquisition represents 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 On a preliminary basis, the Company recorded a contingent consideration liability of $10.3 million as of the acquisition date representing the amounts payable to former shareholders, as outlined under the terms of the merger agreement, payable subject to the satisfaction of performance-based targets during fiscal year 2021 2022, $25.0 143,983 $27.8 3 The results of 3D 3D January 1, 2020, not not The acquisition has been accounted for under the acquisition method of accounting in accordance with ASC 805, Business Combinations March 31, 2021. (in thousands) 3D Hubs Acquisition Assets acquired: Current assets $ 2,497 Intangible assets 34,670 Goodwill 275,438 Other long-term assets 1,139 Total assets acquired 313,744 Liabilities assumed: Current contingent consideration 5,372 Current liabilities 5,666 Long-term contingent consideration 4,928 Other long-term liabilities 3,360 Total liabilities assumed 19,326 Net assets acquired 294,418 Cash paid 134,143 Cash acquired (6,434 ) Net cash consideration 127,709 Equity portion of purchase price 166,709 Total purchase consideration $ 294,418

Note 5 - Goodwill and Other Int

Note 5 - Goodwill and Other Intangible Assets	3 Months Ended
	Mar. 31, 2021
Notes to Financial Statements
Goodwill and Intangible Assets Disclosure [Text Block]	Note 5 Goodwill at March 31, 2021 December 31, 2020 (in thousands) Three Months Ended March 31, 2021 Balance as of the beginning of the period $ 128,752 Goodwill acquired during the period 275,438 Foreign currency translation adjustments (4,764 ) Balance as of the end of the period $ 399,426 Goodwill increased $275.4 million during the three March 31, 2021 3D 3D €104.0 not Intangible assets other than goodwill at March 31, 2021 December 31, 2020 March 31, 2021 December 31, 2020 Useful Weighted Average (in thousands) Gross Accumulated Amortization Net Gross Accumulated Amortization Net Life (in years) Useful Life Remaining (in years) Intangible assets with finite lives: Marketing assets $ 930 $ (643 ) $ 287 $ 930 $ (620 ) $ 310 10.0 3.0 Non-compete agreement 850 (264 ) 586 270 (238 ) 32 2.0 - 5.0 3.5 Software technology 13,229 (3,987 ) 9,242 13,229 (3,645 ) 9,584 10.0 7.3 Software platform 30,916 (598 ) 30,318 - - - 10.0 9.8 Tradenames 364 (23 ) 341 - - - 3.0 2.8 Customer relationships 12,281 (6,172 ) 6,109 10,070 (5,646 ) 4,424 3.0 - 9.0 2.6 Total intangible assets $ 58,570 $ (11,687 ) $ 46,883 $ 24,499 $ (10,149 ) $ 14,350 Intangible assets increased $34.7 million during the three March 31, 2021 3D 3D €13.1 March 31, 2021. December 31, 2020. three March 31, 2021 2020 Estimated aggregated amortization expense based on the current carrying value of the amortizable intangible assets and current exchange rates is as follows: (in thousands) Estimated Amortization Expense Remaining 2021 $ 5,311 2022 7,082 2023 6,879 2024 4,665 2025 4,577 Thereafter 18,369 Total estimated amortization expense $ 46,883

Note 6 - Fair Value Measurement

Note 6 - Fair Value Measurements	3 Months Ended
	Mar. 31, 2021
Notes to Financial Statements
Fair Value Disclosures [Text Block]	Note 6 Accounting Standards Codification, Fair Value Measuremen 820 820 three may Level 1—Quoted Level 2—Observable 1 not Level 3—Unobservable no The Company's assets and liabilities that are required to be measured or disclosed at fair value on a recurring basis include cash and cash equivalents, marketable securities and contingent consideration. The Company’s cash consists of bank deposits. The Company’s cash equivalents measured at fair value consist of money market mutual funds. The Company determines the fair value of these investments using Level 1 1 2 3D 3 The following table summarizes financial assets as of March 31, 2021 December 31, 2020 March 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 Money market mutual fund $ 103 $ - $ - $ 55,378 $ - $ - Marketable securities 22,807 26,545 - - - Total $ 22,910 $ 26,545 $ - $ 55,378 $ - $ - Financial Liabilities: Contingent consideration $ - $ - $ 10,010 $ - $ - $ - Total $ - $ - $ 10,010 $ - $ - $ -

Note 7 - Marketable Securities

Note 7 - Marketable Securities	3 Months Ended
	Mar. 31, 2021
Notes to Financial Statements
Investment [Text Block]	Note 7 The Company invests in short-term and long-term agency, municipal, corporate and other debt securities. As of March 31, 2021 December 31, 2020, first 2021 3D not March 31, 2021 December 31, 2020 March 31, 2021 (in thousands) Cost Unrealized Gains Unrealized Losses Fair Value U.S. municipal securities $ 19,281 $ 51 $ (5 ) $ 19,327 Corporate debt securities 20,010 78 (30 ) 20,058 U.S. government agency securities 3,500 1 (2 ) 3,499 Certificates of deposit/time deposits 5,395 73 - 5,468 Commercial paper 1,000 - - 1,000 Total marketable securities $ 49,186 $ 203 $ (37 ) $ 49,352 December 31, 2020 (in thousands) Cost Unrealized Gains Unrealized Losses Fair Value U.S. municipal securities $ 25,003 $ 83 $ (2 ) $ 25,084 Corporate debt securities 42,048 211 (11 ) 42,248 U.S. government agency securities 18,500 6 (10 ) 18,496 Certificates of deposit/time deposits 5,395 93 - 5,488 Commercial paper 2,499 - - 2,499 Total marketable securities $ 93,445 $ 393 $ (23 ) $ 93,815 Fair values for the corporate debt securities are primarily determined based on quoted market prices (Level 1 2 During the first 2020, 2016 13, Financial Instruments – Credit Losses. no Classification of marketable securities as current or non-current is based upon the security’s maturity date as of the date of these financial statements. The March 31, 2021 may may March 31, (in thousands) 2021 Due in one year or less $ 19,592 Due after one year through five years 29,760 Total marketable securities $ 49,352

Note 8 - Inventory

Note 8 - Inventory	3 Months Ended
	Mar. 31, 2021
Notes to Financial Statements
Inventory Disclosure [Text Block]	Note 8 Inventory consists primarily of raw materials, which are recorded at the lower of cost or market using the standard cost method, which approximates first first The Company’s inventory consisted of the following as of the dates indicated: March 31, December 31, (in thousands) 2021 2020 Total inventory $ 10,267 $ 11,122 Allowance for obsolescence (349 ) (260 ) Inventory, net of allowance $ 9,918 $ 10,862

Note 9 - Stock-based Compensati

Note 9 - Stock-based Compensation	3 Months Ended
	Mar. 31, 2021
Notes to Financial Statements
Share-based Payment Arrangement [Text Block]	Note 9 Under the Company’s 2012 2012 2012 ten may 2012 may not Employee Stock Purchase Plan The Company’s 2012 six May 15 November 15, first Stock-Based Compensation Expense Stock-based compensation expense was $5.6 million and $3.0 million for the three March 31, 2021 2020 Stock Options The following table summarizes stock option activity during the three March 31, 2021 Weighted- Average Stock Options Exercise Price Options outstanding at December 31, 2020 229,531 $ 86.46 Granted 25,642 169.32 Exercised (28,991 ) 58.78 Forfeited (8,097 ) 101.21 Options outstanding at March 31, 2021 218,085 $ 99.34 Exercisable at March 31, 2021 100,932 $ 77.31 The outstanding options generally have a term of ten four five first first The weighted-average grant date fair value of options that were granted during the three March 31, 2021 The following table provides the assumptions used in the Black-Scholes pricing model valuation of options during the three March 31, 2021 2020 Three Months Ended March 31, 2021 2020 Risk-free interest rate 0.80% - 0.96% 1.47% Expected life (years) 6.25 6.25 Expected volatility 45.28% - 45.35% 42.40% Expected dividend yield 0% 0% As of March 31, 2021 Restricted Stock Restricted stock awards are share-settled awards and restrictions lapse ratably over the vesting period, which is generally a period from three five first first The following table summarizes restricted stock activity during the three March 31, 2021 Weighted- Average Grant Date Restricted Fair Value Stock Per Share Restricted stock at December 31, 2020 307,199 $ 98.87 Granted 74,411 187.04 Restrictions lapsed (30,038 ) 84.32 Forfeited (8,662 ) 100.95 Restricted stock at March 31, 2021 342,910 $ 119.21 As of March 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 during the three March 31, 2021 Weighted- Average Grant Date Performance Fair Value Stock Per Share Performance stock at December 31, 2020 19,956 $ 118.66 Granted 15,078 203.64 Restrictions lapsed - - Performance change - - Forfeited - - Performance stock at March 31, 2021 35,034 $ 155.23 The following table provides the assumptions used in the Monte Carlo pricing model valuation of PSUs during the three March 31, 2021 2020 Three Months Ended March 31, 2021 2020 Risk-free interest rate 0.22% 1.41% Expected life (years) 2.87 2.88 Expected volatility 51.40% 38.70% Expected dividend yield 0% 0% As of March 31, 2021 Employee Stock Purchase Plan The following table presents the assumptions used to estimate the fair value of the ESPP during the three March 31, 2021 2020 Three Months Ended March 31, 2021 2020 Risk-free interest rate 0.12% 1.59% Expected life (months) 6.00 6.00 Expected volatility 50.85% 42.63% Expected dividend yield 0% 0%

Note 10 - Accumulated Other Com

Note 10 - Accumulated Other Comprehensive Income (Loss)	3 Months Ended
	Mar. 31, 2021
Notes to Financial Statements
Disclosure of Reclassification Amount [Text Block]	Note 10 Other comprehensive income (loss) is comprised of foreign currency translation adjustments and net unrealized gains (losses) on investments in securities. The following table presents the changes in accumulated other comprehensive income (loss) balances during the three March 31, 2021 2020 Three Months Ended March 31, (in thousands) 2021 2020 Foreign currency translation adjustments Balance at beginning of period $ (3,420 ) $ (7,018 ) Other comprehensive income (loss) before reclassifications (6,842 ) (2,980 ) Amounts reclassified from accumulated other comprehensive loss - - Net current-period other comprehensive income (loss) (6,842 ) (2,980 ) Net unrealized gains (losses) on investments in securities Balance at beginning of period $ - $ - Other comprehensive income (loss) before reclassifications 166 - Amounts reclassified from accumulated other comprehensive loss - - Net current-period other comprehensive income (loss) 166 - Balance at end of period $ (10,096 ) $ (9,998 )

Note 11 - Income Taxes

Note 11 - Income Taxes	3 Months Ended
	Mar. 31, 2021
Notes to Financial Statements
Income Tax Disclosure [Text Block]	Note 11 The Company is subject to income tax in multiple jurisdictions and the use of estimates is required to determine the provision for income taxes. For the three March 31, 2021 2020 three March 31, 2021 not three March 31, 2021 three March 31, 2021 2020 The effective income tax rate for the three March 31, 2021 The Company had unrecognized tax benefits totaling $4.9 million as of March 31, 2021 December 31, 2020 On March 11, 2021, not March 31, 2021

Note 12 - Segment Reporting

Note 12 - Segment Reporting	3 Months Ended
	Mar. 31, 2021
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	Note 12 The Company’s reportable segments are based on the internal reporting used by the Company’s Chief Executive Officer, who is the chief operating decision maker (CODM), to assess operating performance and make decisions about the allocation of resources. The Corporate Unallocated and Japan category includes non-reportable segments, as well as research and development and general and administrative costs that the Company does not Intercompany transactions primarily relate to intercontinental activity and have been eliminated and are excluded from the reported amounts. The difference between income from operations and pre-tax income relates to foreign currency-related gains and losses and interest income on cash balances and investments, which are not Revenue and income from operations by reportable segment for the three March 31, 2021 2020 Three Months Ended March 31, (in thousands) 2021 2020 Revenue: United States $ 91,053 $ 90,076 Europe 21,449 20,787 Japan 3,624 4,245 Total revenue $ 116,126 $ 115,108 Three Months Ended March 31, (in thousands) 2021 2020 Income from Operations: United States $ 22,503 $ 25,089 Europe (1,371 ) 4,364 Corporate Unallocated and Japan (16,871 ) (12,628 ) Total Income from Operations $ 4,261 $ 16,825 Total long-lived assets at March 31, 2021 December 31, 2020 March 31, December 31, (in thousands) 2021 2020 Total long-lived assets: United States $ 213,434 $ 215,721 Europe 59,795 59,388 Japan 6,672 7,557 Total Assets $ 279,901 $ 282,666 Revenue by product line for the three March 31, 2021 2020 Three Months Ended March 31, (in thousands) 2021 2020 Revenue: Injection Molding $ 56,359 $ 54,776 CNC Machining 36,703 37,885 3D Printing 17,235 15,948 Sheet Metal 5,219 5,649 Other Revenue 610 850 Total revenue $ 116,126 $ 115,108

Note 3 - Net Income Per Commo_2

Note 3 - Net Income Per Common Share (Tables)	3 Months Ended
	Mar. 31, 2021
Notes Tables
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	Three Months Ended March 31, (in thousands, except share and per share amounts) 2021 2020 Net income $ 3,712 $ 13,984 Basic - weighted-average shares outstanding: 27,464,136 26,776,806 Effect of dilutive securities: Employee stock options and other 234,059 152,834 Diluted - weighted-average shares outstanding: 27,698,195 26,929,640 Net income per share: Basic $ 0.14 $ 0.52 Diluted $ 0.13 $ 0.52

Note 4 - Business Combinations

Note 4 - Business Combinations (Tables)	3 Months Ended
	Mar. 31, 2021
Acquired 3D Hubs [Member]
Notes Tables
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	(in thousands) 3D Hubs Acquisition Assets acquired: Current assets $ 2,497 Intangible assets 34,670 Goodwill 275,438 Other long-term assets 1,139 Total assets acquired 313,744 Liabilities assumed: Current contingent consideration 5,372 Current liabilities 5,666 Long-term contingent consideration 4,928 Other long-term liabilities 3,360 Total liabilities assumed 19,326 Net assets acquired 294,418 Cash paid 134,143 Cash acquired (6,434 ) Net cash consideration 127,709 Equity portion of purchase price 166,709 Total purchase consideration $ 294,418

Note 5 - Goodwill and Other I_2

Note 5 - Goodwill and Other Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2021
Notes Tables
Schedule of Goodwill [Table Text Block]	(in thousands) Three Months Ended March 31, 2021 Balance as of the beginning of the period $ 128,752 Goodwill acquired during the period 275,438 Foreign currency translation adjustments (4,764 ) Balance as of the end of the period $ 399,426
Schedule of Finite-Lived Intangible Assets [Table Text Block]	March 31, 2021 December 31, 2020 Useful Weighted Average (in thousands) Gross Accumulated Amortization Net Gross Accumulated Amortization Net Life (in years) Useful Life Remaining (in years) Intangible assets with finite lives: Marketing assets $ 930 $ (643 ) $ 287 $ 930 $ (620 ) $ 310 10.0 3.0 Non-compete agreement 850 (264 ) 586 270 (238 ) 32 2.0 - 5.0 3.5 Software technology 13,229 (3,987 ) 9,242 13,229 (3,645 ) 9,584 10.0 7.3 Software platform 30,916 (598 ) 30,318 - - - 10.0 9.8 Tradenames 364 (23 ) 341 - - - 3.0 2.8 Customer relationships 12,281 (6,172 ) 6,109 10,070 (5,646 ) 4,424 3.0 - 9.0 2.6 Total intangible assets $ 58,570 $ (11,687 ) $ 46,883 $ 24,499 $ (10,149 ) $ 14,350
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	(in thousands) Estimated Amortization Expense Remaining 2021 $ 5,311 2022 7,082 2023 6,879 2024 4,665 2025 4,577 Thereafter 18,369 Total estimated amortization expense $ 46,883

Note 6 - Fair Value Measureme_2

Note 6 - Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2021
Notes Tables
Fair Value, Assets Measured on Recurring Basis [Table Text Block]	March 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 Money market mutual fund $ 103 $ - $ - $ 55,378 $ - $ - Marketable securities 22,807 26,545 - - - Total $ 22,910 $ 26,545 $ - $ 55,378 $ - $ - Financial Liabilities: Contingent consideration $ - $ - $ 10,010 $ - $ - $ - Total $ - $ - $ 10,010 $ - $ - $ -

Note 7 - Marketable Securities

Note 7 - Marketable Securities (Tables)	3 Months Ended
	Mar. 31, 2021
Notes Tables
Debt Securities, Available-for-sale [Table Text Block]	March 31, 2021 (in thousands) Cost Unrealized Gains Unrealized Losses Fair Value U.S. municipal securities $ 19,281 $ 51 $ (5 ) $ 19,327 Corporate debt securities 20,010 78 (30 ) 20,058 U.S. government agency securities 3,500 1 (2 ) 3,499 Certificates of deposit/time deposits 5,395 73 - 5,468 Commercial paper 1,000 - - 1,000 Total marketable securities $ 49,186 $ 203 $ (37 ) $ 49,352
Debt Securities, Held-to-maturity [Table Text Block]	December 31, 2020 (in thousands) Cost Unrealized Gains Unrealized Losses Fair Value U.S. municipal securities $ 25,003 $ 83 $ (2 ) $ 25,084 Corporate debt securities 42,048 211 (11 ) 42,248 U.S. government agency securities 18,500 6 (10 ) 18,496 Certificates of deposit/time deposits 5,395 93 - 5,488 Commercial paper 2,499 - - 2,499 Total marketable securities $ 93,445 $ 393 $ (23 ) $ 93,815
Investments Classified by Contractual Maturity Date [Table Text Block]	March 31, (in thousands) 2021 Due in one year or less $ 19,592 Due after one year through five years 29,760 Total marketable securities $ 49,352

Note 8 - Inventory (Tables)

Note 8 - Inventory (Tables)	3 Months Ended
	Mar. 31, 2021
Notes Tables
Schedule of Inventory, Current [Table Text Block]	March 31, December 31, (in thousands) 2021 2020 Total inventory $ 10,267 $ 11,122 Allowance for obsolescence (349 ) (260 ) Inventory, net of allowance $ 9,918 $ 10,862

Note 9 - Stock-based Compensa_2

Note 9 - Stock-based Compensation (Tables)	3 Months Ended
	Mar. 31, 2021
Notes Tables
Share-based Payment Arrangement, Option, Activity [Table Text Block]	Weighted- Average Stock Options Exercise Price Options outstanding at December 31, 2020 229,531 $ 86.46 Granted 25,642 169.32 Exercised (28,991 ) 58.78 Forfeited (8,097 ) 101.21 Options outstanding at March 31, 2021 218,085 $ 99.34 Exercisable at March 31, 2021 100,932 $ 77.31
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	Three Months Ended March 31, 2021 2020 Risk-free interest rate 0.80% - 0.96% 1.47% Expected life (years) 6.25 6.25 Expected volatility 45.28% - 45.35% 42.40% Expected dividend yield 0% 0%
Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]	Weighted- Average Grant Date Restricted Fair Value Stock Per Share Restricted stock at December 31, 2020 307,199 $ 98.87 Granted 74,411 187.04 Restrictions lapsed (30,038 ) 84.32 Forfeited (8,662 ) 100.95 Restricted stock at March 31, 2021 342,910 $ 119.21
Schedule of Nonvested Performance-based Units Activity [Table Text Block]	Weighted- Average Grant Date Performance Fair Value Stock Per Share Performance stock at December 31, 2020 19,956 $ 118.66 Granted 15,078 203.64 Restrictions lapsed - - Performance change - - Forfeited - - Performance stock at March 31, 2021 35,034 $ 155.23
Schedule of Share-based Payment Award, Awards Other Than Stock Options, Valuation Assumptions [Table Text Block]	Three Months Ended March 31, 2021 2020 Risk-free interest rate 0.22% 1.41% Expected life (years) 2.87 2.88 Expected volatility 51.40% 38.70% Expected dividend yield 0% 0%
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]	Three Months Ended March 31, 2021 2020 Risk-free interest rate 0.12% 1.59% Expected life (months) 6.00 6.00 Expected volatility 50.85% 42.63% Expected dividend yield 0% 0%

Note 10 - Accumulated Other C_2

Note 10 - Accumulated Other Comprehensive Income (Loss) (Tables)	3 Months Ended
	Mar. 31, 2021
Notes Tables
Comprehensive Income (Loss) [Table Text Block]	Three Months Ended March 31, (in thousands) 2021 2020 Foreign currency translation adjustments Balance at beginning of period $ (3,420 ) $ (7,018 ) Other comprehensive income (loss) before reclassifications (6,842 ) (2,980 ) Amounts reclassified from accumulated other comprehensive loss - - Net current-period other comprehensive income (loss) (6,842 ) (2,980 ) Net unrealized gains (losses) on investments in securities Balance at beginning of period $ - $ - Other comprehensive income (loss) before reclassifications 166 - Amounts reclassified from accumulated other comprehensive loss - - Net current-period other comprehensive income (loss) 166 - Balance at end of period $ (10,096 ) $ (9,998 )

Note 12 - Segment Reporting (Ta

Note 12 - Segment Reporting (Tables)	3 Months Ended
	Mar. 31, 2021
Notes Tables
Income from Operations by Geographic Area [Table Text Block]	Three Months Ended March 31, (in thousands) 2021 2020 Income from Operations: United States $ 22,503 $ 25,089 Europe (1,371 ) 4,364 Corporate Unallocated and Japan (16,871 ) (12,628 ) Total Income from Operations $ 4,261 $ 16,825
Long-lived Assets by Geographic Areas [Table Text Block]	March 31, December 31, (in thousands) 2021 2020 Total long-lived assets: United States $ 213,434 $ 215,721 Europe 59,795 59,388 Japan 6,672 7,557 Total Assets $ 279,901 $ 282,666
Disaggregation of Revenue [Table Text Block]	Three Months Ended March 31, (in thousands) 2021 2020 Revenue: Injection Molding $ 56,359 $ 54,776 CNC Machining 36,703 37,885 3D Printing 17,235 15,948 Sheet Metal 5,219 5,649 Other Revenue 610 850 Total revenue $ 116,126 $ 115,108
Operating Segments [Member]
Notes Tables
Revenue from External Customers by Geographic Areas [Table Text Block]	Three Months Ended March 31, (in thousands) 2021 2020 Revenue: United States $ 91,053 $ 90,076 Europe 21,449 20,787 Japan 3,624 4,245 Total revenue $ 116,126 $ 115,108

Note 3 - Net Income Per Commo_3

Note 3 - Net Income Per Common Share - Computation of Basic and Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Net income	$ 3,712	$ 13,984
Basic - weighted-average shares outstanding: (in shares)	27,464,136	26,776,806
Employee stock options and other (in shares)	234,059	152,834
Diluted - weighted-average shares outstanding: (in shares)	27,698,195	26,929,640
Basic (in dollars per share)	$ 0.14	$ 0.52
Diluted (in dollars per share)	$ 0.13	$ 0.52

Note 4 - Business Combination_2

Note 4 - Business Combinations (Details Textual) - USD ($) $ in Thousands	Jan. 22, 2021	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2021
Payments to Acquire Businesses, Net of Cash Acquired, Total		$ 127,709	$ 0
Acquired 3D Hubs [Member]
Business Combination, Consideration Transferred, Total	$ 294,418
Payments to Acquire Businesses, Net of Cash Acquired, Total	$ 127,709
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)	863,995
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable	$ 166,709
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	52,800
Payments to Acquire Businesses, Gross	134,143
Business Combination, Contingent Consideration, Liability, Total	$ 10,300
Acquired 3D Hubs [Member] | Forecast [Member] | Maximum [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)				143,983
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable				$ 27,800
Payments to Acquire Businesses, Gross				$ 25,000

Note 4 - Business Combination_3

Note 4 - Business Combinations - Allocation of Purchase Price for the Acquisition of Rapid (Details) - USD ($) $ in Thousands	Jan. 22, 2021	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Assets acquired:
Goodwill		$ 399,426		$ 128,752
Liabilities assumed:
Net cash consideration		$ 127,709	$ 0
Acquired 3D Hubs [Member]
Assets acquired:
Current assets	$ 2,497
Intangible assets	34,670
Goodwill	275,438
Other long-term assets	1,139
Total assets acquired	313,744
Liabilities assumed:
Current contingent consideration	5,372
Current liabilities	5,666
Long-term contingent consideration	4,928
Other long-term liabilities	3,360
Total liabilities assumed	19,326
Net assets acquired	294,418
Payments to Acquire Businesses, Gross	134,143
Cash acquired	(6,434)
Net cash consideration	127,709
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable	166,709
Total purchase consideration	$ 294,418

Note 5 - Goodwill and Other I_3

Note 5 - Goodwill and Other Intangible Assets (Details Textual) $ in Thousands, € in Millions	Jan. 22, 2021USD ($)	Jan. 22, 2021EUR (€)	Mar. 31, 2021USD ($)	Mar. 31, 2020USD ($)
Goodwill, Acquired During Period			$ 275,438
Finite Lived Intangible Assets, Foreign Currency Translation Gain (Loss)			0
Amortization of Intangible Assets, Total			1,500	$ 800
Acquired 3D Hubs [Member]
Goodwill, Acquired During Period			275,400
Finite-lived Intangible Assets Acquired			34,700
Finite Lived Intangible Assets, Foreign Currency Translation Gain (Loss)			$ (600)
Acquired 3D Hubs [Member] | Europe [Member]
Goodwill, Acquired During Period | €		€ 104
Finite-lived Intangible Assets Acquired | €		€ 13.1
Acquired 3D Hubs [Member] | UNITED STATES
Goodwill, Acquired During Period	$ 148,800
Finite-lived Intangible Assets Acquired	$ 18,700

Note 5 - Goodwill and Other I_4

Note 5 - Goodwill and Other Intangible Assets - Changes in the Carrying Amount of Goodwill (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021USD ($)
Goodwill	$ 128,752
Goodwill, Acquired During Period	275,438
Foreign currency translation adjustments	(4,764)
Goodwill	$ 399,426

Note 5 - Goodwill and Other I_5

Note 5 - Goodwill and Other Intangible Assets - Intangible Assets Other Than Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Gross	$ 58,570	$ 24,499
Accumulated Amortization	(11,687)	(10,149)
Net	46,883	14,350
Marketing-Related Intangible Assets [Member]
Gross	930	930
Accumulated Amortization	(643)	(620)
Net	$ 287	310
Useful Life (Year)	10 years
Weighted average useful life remaining (Year)	3 years
Noncompete Agreements [Member]
Gross	$ 850	270
Accumulated Amortization	(264)	(238)
Net	$ 586	32
Weighted average useful life remaining (Year)	3 years 6 months
Noncompete Agreements [Member] | Minimum [Member]
Useful Life (Year)	2 years
Noncompete Agreements [Member] | Maximum [Member]
Useful Life (Year)	5 years
Computer Software, Intangible Asset [Member]
Gross	$ 13,229	13,229
Accumulated Amortization	(3,987)	(3,645)
Net	$ 9,242	9,584
Useful Life (Year)	10 years
Weighted average useful life remaining (Year)	7 years 3 months 18 days
Software Platform [Member]
Gross	$ 30,916	0
Accumulated Amortization	(598)	0
Net	$ 30,318	0
Useful Life (Year)	10 years
Weighted average useful life remaining (Year)	9 years 9 months 18 days
Trade Names [Member]
Gross	$ 364	0
Accumulated Amortization	(23)	0
Net	$ 341	0
Useful Life (Year)	3 years
Weighted average useful life remaining (Year)	2 years 9 months 18 days
Customer Relationships [Member]
Gross	$ 12,281	10,070
Accumulated Amortization	(6,172)	(5,646)
Net	$ 6,109	$ 4,424
Weighted average useful life remaining (Year)	2 years 7 months 6 days
Customer Relationships [Member] | Minimum [Member]
Useful Life (Year)	3 years
Customer Relationships [Member] | Maximum [Member]
Useful Life (Year)	9 years

Note 5 - Goodwill and Other I_6

Note 5 - Goodwill and Other Intangible Assets - Estimated Aggregated Amortization Expense (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Remaining 2021	$ 5,311
2022	7,082
2023	6,879
2024	4,665
2025	4,577
Thereafter	18,369
Total estimated amortization expense	$ 46,883	$ 14,350

Note 6 - Fair Value Measureme_3

Note 6 - Fair Value Measurements - Fair Value of Financial Assets Measured on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Marketable securities	$ 49,352
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Marketable securities	22,807	$ 0
Total	22,910	55,378
Contingent consideration	0	0
Total	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]
Money market mutual fund	103	55,378
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Marketable securities	26,545	0
Total	26,545	0
Contingent consideration	0	0
Total	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Money Market Funds [Member]
Money market mutual fund	0	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Marketable securities		0
Total	0	0
Contingent consideration	10,010	0
Total	10,010	0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Money Market Funds [Member]
Money market mutual fund	$ 0	$ 0

Note 7 - Marketable Securitie_2

Note 7 - Marketable Securities - Short-term and Long-term Available for Sale Securities (Details) $ in Thousands	Mar. 31, 2021USD ($)
Amortized Cost	$ 49,186
Unrealized Gains	203
Unrealized Losses	(37)
Fair Value	49,352
Bank Time Deposits [Member]
Amortized Cost	5,395
Unrealized Gains	73
Unrealized Losses	0
Fair Value	5,468
US States and Political Subdivisions Debt Securities [Member]
Amortized Cost	19,281
Unrealized Gains	51
Unrealized Losses	(5)
Fair Value	19,327
Corporate Debt Securities [Member]
Amortized Cost	20,010
Unrealized Gains	78
Unrealized Losses	(30)
Fair Value	20,058
US Government Agencies Debt Securities [Member]
Amortized Cost	3,500
Unrealized Gains	1
Unrealized Losses	(2)
Fair Value	3,499
Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Amortized Cost	1,000
Unrealized Gains	0
Unrealized Losses	0
Fair Value	$ 1,000

Note 7 - Marketable Securitie_3

Note 7 - 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 States and Political Subdivisions Debt Securities [Member]
Amortized Cost	25,003
Unrealized Gains	83
Unrealized Losses	(2)
Fair Value	25,084
Corporate Debt Securities [Member]
Amortized Cost	42,048
Unrealized Gains	211
Unrealized Losses	(11)
Fair Value	42,248
US Government Agencies Debt Securities [Member]
Amortized Cost	18,500
Unrealized Gains	6
Unrealized Losses	(10)
Fair Value	18,496
Commercial Paper, Not Included with Cash and Cash Equivalents [Member]
Amortized Cost	2,499
Unrealized Gains	0
Unrealized Losses	0
Fair Value	$ 2,499

Note 7 - Marketable Securitie_4

Note 7 - Marketable Securities - Balance of Held-to-maturity Debt Securities by Contractual Maturity (Details) $ in Thousands	Mar. 31, 2021USD ($)
Due in one year or less	$ 19,592
Due after one year through five years	29,760
Total marketable securities	$ 49,352

Note 8 - Inventory - Inventory

Note 8 - Inventory - Inventory (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Total inventory	$ 10,267	$ 11,122
Allowance for obsolescence	(349)	(260)
Inventory, net of allowance	$ 9,918	$ 10,862

Note 9 - Stock-based Compensa_3

Note 9 - Stock-based Compensation (Details Textual) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Share-based Payment Arrangement, Expense	$ 5.6	$ 3
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)	$ 75.19
ESPP [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date	15.00%
Employee Stock Purchase Plan, Offering Period (Month)	6 months
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent	85.00%
Share-based Payment Arrangement, Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)	10 years
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total	$ 5.3
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)	2 years 10 months 24 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	$ 31.1
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)	2 years 8 months 12 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	$ 4.1
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)	2 years 7 months 6 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 9 - Stock-based Compensa_4

Note 9 - Stock-based Compensation - Stock Option Activity (Details)	3 Months Ended
	Mar. 31, 2021$ / sharesshares
Options outstanding (in shares) | shares	229,531
Options outstanding, weighted-average exercise price (in dollars per share) | $ / shares	$ 86.46
Granted (in shares) | shares	25,642
Granted, weighted-average exercise price (in dollars per share) | $ / shares	$ 169.32
Exercised (in shares) | shares	(28,991)
Exercised, weighted-average exercise price (in dollars per share) | $ / shares	$ 58.78
Forfeited (in shares) | shares	(8,097)
Forfeited, weighted-average exercise price (in dollars per share) | $ / shares	$ 101.21
Options outstanding (in shares) | shares	218,085
Options outstanding, weighted-average exercise price (in dollars per share) | $ / shares	$ 99.34
Options exercisable (in shares) | shares	100,932
Options exercisable, weighted-average exercise price (in dollars per share) | $ / shares	$ 77.31

Note 9 - Stock-based Compensa_5

Note 9 - Stock-based Compensation - Assumptions Used in the Black-Scholes Option Pricing Model (Details) - Share-based Payment Arrangement, Option [Member]	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Risk-free interest rate		1.47%
Expected life (Year)	6 years 3 months	6 years 3 months
Expected volatility		42.40%
Expected dividend yield	0.00%	0.00%
Minimum [Member]
Risk-free interest rate	0.80%
Expected volatility	45.28%
Maximum [Member]
Risk-free interest rate	0.96%
Expected volatility	45.35%

Note 9 - Stock-based Compensa_6

Note 9 - Stock-based Compensation - Restricted Stock Options (Details) - Restricted Stock [Member]	3 Months Ended
	Mar. 31, 2021$ / sharesshares
Restricted stock (in shares) | shares	307,199
Restricted stock, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 98.87
Granted (in shares) | shares	74,411
Granted, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 187.04
Restrictions lapsed (in shares) | shares	(30,038)
Restrictions lapsed, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 84.32
Forfeited (in shares) | shares	(8,662)
Forfeited, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 100.95
Restricted stock (in shares) | shares	342,910
Restricted stock, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 119.21

Note 9 - Stock-based Compensa_7

Note 9 - Stock-based Compensation - Performance Stock (Details) - Performance Shares [Member]	3 Months Ended
	Mar. 31, 2021$ / sharesshares
Performance stock (in shares) | shares	19,956
Restricted stock, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 118.66
Granted (in shares) | shares	15,078
Granted, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 203.64
Restrictions lapsed (in shares) | shares	0
Restrictions lapsed, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 0
Performance change (in shares) | shares	0
Performance change, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 0
Forfeited (in shares) | shares	0
Forfeited, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 0
Performance stock (in shares) | shares	35,034
Restricted stock, weighted-average grant date fair value (in dollars per share) | $ / shares	$ 155.23

Note 9 - Stock-based Compensa_8

Note 9 - Stock-based Compensation - Assumptions Used in the Valuation of Performance Stock (Details) - Performance Shares [Member]	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Risk-free interest rate	0.22%	1.41%
Expected life (Year)	2 years 10 months 13 days	2 years 10 months 17 days
Expected volatility	51.40%	38.70%
Expected dividend yield	0.00%	0.00%

Note 9 - Stock-based Compensa_9

Note 9 - Stock-based Compensation - Assumptions Used to Estimate the Fair Value of the ESPP (Details) - Employee Stock Purchase Plan [Member]	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Risk-free interest rate	0.12%	1.59%
Expected life (months) (Month)	6 months	6 months
Expected volatility	50.85%	42.63%
Expected dividend yield	0.00%	0.00%

Note 10 - Accumulated Other C_3

Note 10 - Accumulated Other Comprehensive Income (Loss) - Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Balance	$ 644,356	$ 585,790
Balance	813,431	587,740
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Balance	(3,420)	(7,018)
Other comprehensive income (loss) before reclassifications	(6,842)	(2,980)
Amounts reclassified from accumulated other comprehensive loss	0	0
Net current-period other comprehensive income (loss)	(6,842)	(2,980)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
Balance	0	0
Other comprehensive income (loss) before reclassifications	166	0
Amounts reclassified from accumulated other comprehensive loss	0	0
Net current-period other comprehensive income (loss)	166	0
AOCI Attributable to Parent [Member]
Balance	(3,420)	(7,018)
Balance	$ (10,096)	$ (9,998)

Note 11 - Income Taxes (Details

Note 11 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Income Tax Expense (Benefit), Total	$ 236	$ 3,895
Effective Income Tax Rate Reconciliation, Percent, Total	6.00%	21.80%
Effective Income Tax Rate Continuing Operations Increase (Decrease) During the Period	(15.80%)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%
Unrecognized Tax Benefits, Ending Balance	$ 4,900		$ 4,800

Note 12 - Segment Reporting - R

Note 12 - Segment Reporting - Revenue From Operations by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenue	$ 116,126	$ 115,108
Operating Segments [Member]
Revenue	116,126	115,108
Operating Segments [Member] | United States Segment [Member]
Revenue	91,053	90,076
Operating Segments [Member] | Europe Segment [Member]
Revenue	21,449	20,787
Operating Segments [Member] | Japan Segment [Member]
Revenue	$ 3,624	$ 4,245

Note 12 - Segment Reporting - I

Note 12 - Segment Reporting - Income From Operations (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income from operations	$ 4,261	$ 16,825
Operating Segments [Member] | United States Segment [Member]
Income from operations	22,503	25,089
Operating Segments [Member] | Europe Segment [Member]
Income from operations	(1,371)	4,364
Operating Segments [Member] | Corporate Unallocated and Japan Segment[Member]
Income from operations	$ (16,871)	$ (12,628)

Note 12 - Segment Reporting - L

Note 12 - Segment Reporting - Long-lived Assets by Geographic Region (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Long-lived assets	$ 279,901	$ 282,666
Operating Segments [Member]
Long-lived assets	279,901	282,666
Operating Segments [Member] | United States Segment [Member]
Long-lived assets	213,434	215,721
Operating Segments [Member] | Europe Segment [Member]
Long-lived assets	59,795	59,388
Operating Segments [Member] | Japan Segment [Member]
Long-lived assets	$ 6,672	$ 7,557

Note 12 - Segment Reporting - D

Note 12 - Segment Reporting - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenue	$ 116,126	$ 115,108
Injection Molding (Protomold) [Member]
Revenue	56,359	54,776
CNC Machining (Firstcut) [Member]
Revenue	36,703	37,885
3D Printing (Fineline) [Member]
Revenue	17,235	15,948
Sheet Metal [Member]
Revenue	5,219	5,649
Other Products [Member]
Revenue	$ 610	$ 850