Proto Labs (PRLB) 10-K 28 Feb 14 2013 FY Annual report Financial data

Document_And_Entity_Informatio

Document And Entity Information (USD $)	12 Months Ended
	Dec. 31, 2013	Feb. 21, 2014	Jun. 28, 2013
Document and Entity Information [Abstract]	'	'	'
Entity Registrant Name	'Proto Labs Inc	'	'
Document Type	'10-K	'	'
Current Fiscal Year End Date	'--12-31	'	'
Entity Common Stock, Shares Outstanding	'	25,580,699	'
Entity Public Float	'	'	$1,100,000,000
Amendment Flag	'false	'	'
Entity Central Index Key	'0001443669	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Voluntary Filers	'No	'	'
Entity Filer Category	'Large Accelerated Filer	'	'
Entity Well-known Seasoned Issuer	'Yes	'	'
Document Period End Date	31-Dec-13	'	'
Document Fiscal Year Focus	'2013	'	'
Document Fiscal Period Focus	'FY	'	'

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Current assets	'	'
Cash and cash equivalents	$43,039	$36,759
Short-term marketable securities	36,339	25,137
Accounts receivable, net of allowance for doubtful accounts of $90 and $154 as of December 31, 2013 and December 31, 2012, respectively	18,320	15,791
Inventory	5,166	4,619
Prepaid expenses and other current assets	3,569	5,364
Income taxes receivable	2,907	1,877
Deferred tax assets	455	609
Total current assets	109,795	90,156
Property and equipment, net	56,101	45,316
Long-term marketable securities	64,023	36,965
Other long-term assets	256	285
Total assets	230,175	172,722
Current liabilities	'	'
Accounts payable	6,455	4,758
Accrued compensation	6,196	5,995
Accrued liabilities and other	808	513
Current portion of long-term debt obligations	204	273
Total current liabilities	13,663	11,539
Long-term deferred tax liabilities	3,682	3,346
Long-term debt obligations	159	356
Other long-term liabilities	1,028	782
Total liabilities	18,532	16,023
Shareholders' equity	'	'
Preferred stock, $0.001 par value, authorized 10,000,000 shares; issued and outstanding 0 shares as of December 31, 2013 and December 31, 2012, respectively	'	'
Common stock, $0.001 par value, authorized 150,000,000 shares; issued and outstanding 25,546,107 and 24,803,640 shares as of December 31, 2013 and December 31, 2012, respectively	26	25
Additional paid in capital	166,861	147,032
Retained earnings	45,847	10,570
Accumulated other comprehensive income (loss)	-1,091	-928
Total shareholders' equity	211,643	156,699
Total liabilities and shareholders' equity	$230,175	$172,722

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parentheticals) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, except Share data, unless otherwise specified
Allowance for doubtful accounts (in Dollars)	$90	$154
Preferred stock, par value (in Dollars per share)	$0.00	$0.00
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in Dollars per share)	$0.00	$0.00
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	25,546,107	24,803,640
Common stock, shares outstanding	25,546,107	24,803,640

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statements of Operations:	'	'	'
Revenue	$163,112	$125,991	$98,939
Cost of revenue	61,410	49,853	39,324
Gross profit	101,702	76,138	59,615
Operating expenses	'	'	'
Marketing and sales	22,386	18,098	15,752
Research and development	11,863	9,137	5,222
General and administrative	16,154	13,957	11,772
Total operating expenses	50,403	41,192	32,746
Income from operations	51,299	34,946	26,869
Other income (expense), net	279	23	-114
Income before income taxes	51,578	34,969	26,755
Provision for income taxes	16,301	10,944	8,783
Net income	35,277	24,025	17,972
Less: dividends on redeemable preferred stock	'	'	-4,179
Less: undistributed earnings allocated to preferred shareholders	'	'	-4,507
Net income attributable to common shareholders	35,277	24,025	9,286
Net income per share:	'	'	'
Basic (in Dollars per share)	$1.40	$1.03	$0.75
Diluted (in Dollars per share)	$1.36	$0.98	$0.67
Shares used to compute net income per share:	'	'	'
Basic (in Shares)	25,198,556	23,373,593	12,352,004
Diluted (in Shares)	25,859,741	24,443,665	13,939,072
Other Comprehensive Income (Loss), net of tax	'	'	'
Foreign currency translation adjustments	-163	-190	-280
Comprehensive income	$35,114	$23,835	$17,692

Consolidated_Statements_of_Sha

Consolidated Statements of Shareholders' Equity (Deficit) (USD $)	Common Stock [Member]	Common Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Redeemable Convertible Preferred Stock [Member]	Redeemable Common Stock [Member]	Total
In Thousands, except Share data	Redeemable Convertible Preferred Stock [Member]	Redeemable Common Stock [Member]		Redeemable Convertible Preferred Stock [Member]	Redeemable Common Stock [Member]
Balance at Dec. 31, 2010	'	'	$8	'	'	$5,896	($41,537)	($458)	'	'	($36,091)
Balance (in Shares) at Dec. 31, 2010	'	'	8,013,250	'	'	'	'	'	'	'	'
Common shares issued on exercise of options	'	'	'	'	'	706	'	'	'	'	706
Common shares issued on exercise of options (in Shares)	'	'	166,838	'	'	'	'	'	'	'	'
Common shares issued on exercise of warrants	'	'	2	'	'	497	'	'	'	'	499
Common shares issued on exercise of warrants (in Shares)	'	'	1,526,182	'	'	'	'	'	'	'	'
Preferred stock dividends	'	'	'	'	'	'	-4,179	'	'	'	-4,179
Stock-based compensation expense	'	'	'	'	'	1,130	'	'	'	'	1,130
Net income	'	'	'	'	'	'	17,972	'	'	'	17,972
Foreign currency translation adjustment	'	'	'	'	'	'	'	-280	'	'	-280
Comprehensive income	'	'	'	'	'	'	'	'	'	'	17,692
Balance at Dec. 31, 2011	'	'	10	'	'	8,229	-27,744	-738	'	'	-20,243
Balance (in Shares) at Dec. 31, 2011	'	'	9,706,270	'	'	'	'	'	'	'	'
Common shares issued upon initial public offering	'	'	5	'	'	71,525	'	'	'	'	71,530
Common shares issued upon initial public offering (in Shares)	'	'	4,945,000	'	'	'	'	'	'	'	'
Common shares issued upon follow-on offering	'	'	'	'	'	2,451	'	'	'	'	2,451
Common shares issued upon follow-on offering (in Shares)	'	'	100,000	'	'	'	'	'	'	'	'
Common shares issued upon conversion of redeemable stock	6	3	'	66,069	816	'	'	'	66,075	819	'
Common shares issued upon conversion of redeemable stock (in Shares)	5,991,790	3,189,648	'	'	'	'	'	'	'	'	'
Common shares issued on exercise of options	'	'	1	'	'	2,974	'	'	'	'	2,975
Common shares issued on exercise of options (in Shares)	'	'	870,932	'	'	'	'	'	'	'	'
Excess tax benefit from stock option exercises	'	'	'	'	'	6,218	'	'	'	'	6,218
Preferred stock dividends	'	'	'	'	'	-14,289	14,289	'	'	'	'
Stock-based compensation expense	'	'	'	'	'	3,039	'	'	'	'	3,039
Net income	'	'	'	'	'	'	24,025	'	'	'	24,025
Foreign currency translation adjustment	'	'	'	'	'	'	'	-190	'	'	-190
Comprehensive income	'	'	'	'	'	'	'	'	'	'	23,835
Balance at Dec. 31, 2012	'	'	25	'	'	147,032	10,570	-928	'	'	156,699
Balance (in Shares) at Dec. 31, 2012	'	'	24,803,640	'	'	'	'	'	'	'	24,803,640
Common shares issued on exercise of options	'	'	1	'	'	6,495	'	'	'	'	6,496
Common shares issued on exercise of options (in Shares)	'	'	742,467	'	'	'	'	'	'	'	'
Excess tax benefit from stock option exercises	'	'	'	'	'	9,873	'	'	'	'	9,873
Stock-based compensation expense	'	'	'	'	'	3,461	'	'	'	'	3,461
Net income	'	'	'	'	'	'	35,277	'	'	'	35,277
Foreign currency translation adjustment	'	'	'	'	'	'	'	-163	'	'	-163
Comprehensive income	'	'	'	'	'	'	'	'	'	'	35,114
Balance at Dec. 31, 2013	'	'	$26	'	'	$166,861	$45,847	($1,091)	'	'	$211,643
Balance (in Shares) at Dec. 31, 2013	'	'	25,546,107	'	'	'	'	'	'	'	25,546,107

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating activities	'	'	'
Net income	$35,277	$24,025	$17,972
Adjustments to reconcile net income to net cash provided by operating activities:	'	'	'
Depreciation and amortization	7,569	6,080	4,264
Stock-based compensation expense	3,461	3,039	1,130
Deferred taxes	467	-583	2,230
Excess tax benefit from stock-based compensation	-9,873	-6,218	-657
Loss (gain) on disposal of property and equipment	110	154	-10
Amortization of held-to-maturity securities	1,468	369	'
Changes in operating assets and liabilities:	'	'	'
Accounts receivable	-2,470	-4,372	-3,457
Inventories	-579	-829	-2,195
Prepaid expenses and other	1,630	-1,887	-591
Income taxes	8,845	4,314	37
Accounts payable	1,651	306	1,545
Accrued liabilities and other	885	1,277	3,267
Net cash provided by operating activities	48,441	25,675	23,535
Investing activities	'	'	'
Purchases of property and equipment	-18,753	-17,397	-19,003
Purchases of marketable securities	-106,298	-84,588	'
Proceeds from maturities of marketable securities	66,570	22,368	500
Net cash used in investing activities	-58,481	-79,617	-18,503
Financing activities	'	'	'
Proceeds from initial public offering, net of offering costs	'	71,530	'
Proceeds from follow-on offering, net of offering costs	'	2,451	'
Payments on debt	-258	-388	-4,049
Proceeds from exercises of stock options and other	6,496	2,975	547
Excess tax benefit from stock-based compensation	9,873	6,218	657
Net cash provided by (used in) financing activities	16,111	82,786	-2,845
Effect of exchange rate changes on cash and cash equivalents	209	-220	-153
Net increase in cash and cash equivalents	6,280	28,624	2,034
Cash and cash equivalents, beginning of period	36,759	8,135	6,101
Cash and cash equivalents, end of period	43,039	36,759	8,135
Supplemental cash flow disclosure	'	'	'
Cash paid for interest	35	63	140
Cash paid for taxes	$6,593	$7,990	$5,358

Note_1_Nature_of_Business

Note 1 - Nature of Business	12 Months Ended
	Dec. 31, 2013
Disclosure Text Block [Abstract]	'
Nature of Operations [Text Block]	'
	Note 1 — Nature of Business
	Organization and business
	Proto Labs, Inc. and its subsidiaries (Proto Labs, the Company, we, us, or our) is an online and technology-enabled manufacturer of quick-turn computer numerical control (CNC) machined and injection-molded custom parts for prototyping and short-run production. The Company’s customers are product developers throughout the world who require a faster and less expensive way to obtain low volumes of parts. The Company’s proprietary technology eliminates most of the time-consuming and expensive skilled labor conventionally required to quote and manufacture parts in low volumes, and its customers conduct nearly all of their business with the Company over the Internet. The Company targets its services to the millions of product developers who use three-dimensional (3D) computer-aided design (CAD) software to design products across a diverse range of end-markets. The Company has established operations in the United States, Europe and Japan, which the Company believes are among the largest geographic markets where these product developers are located. The Company’s primary manufacturing services currently include Firstcut, which is a CNC machining service, and Protomold, which is an injection molding service. Proto Labs, Inc. is located in Maple Plain, Minnesota. The Company’s subsidiaries, Proto Labs Limited and Proto Labs G.K. are located in Telford, United Kingdom and Yamato-Shi, Kanagawa, Japan, respectively.

Note_2_Summary_of_Significant_

Note 2 - Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Significant Accounting Policies [Text Block]	'
	Note 2 — Summary of Significant Accounting Policies
	Principles of consolidation
	The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries, Proto Labs Limited and Proto Labs G.K. All significant intercompany accounts and transactions have been eliminated in consolidation.
	Reclassifications
	Certain reclassifications have been made to the Consolidated Statement of Cash Flows for the year ended December 31, 2012 to conform to the presentation used in the December 31, 2013 Consolidated Statement of Cash Flows. The reclassifications had no effect on the increase in cash and cash equivalents as previously reported.
	Certain reclassifications have been made to the significant components of deferred tax assets and liabilities as of December 31, 2012 as presented in Note 13 – Income Taxes to conform to the presentation of components of deferred tax assets and liabilities as of December 31, 2013. The reclassification had no effect on the total deferred assets or liabilities as previously reported.
	Public offerings
	In February 2012, the Company issued 4.9 million shares of common stock (including the exercise of the underwriters’ over-allotment shares) in conjunction with its initial public offering (IPO). The public offering price of the shares sold in the offering was $16.00 per share. The total gross proceeds from the IPO to the Company were $79.1 million. After deducting underwriting discounts and commissions and offering expenses payable by the Company, the aggregate net proceeds received by the Company totaled approximately $71.5 million.
	Immediately prior to the consummation of the IPO, all outstanding shares of redeemable convertible preferred stock and redeemable common stock were converted into shares of common stock. Shares of redeemable convertible preferred stock were converted into 5,991,790 shares of common stock. All previously accrued dividends on the preferred stock were released back into retained earnings as of December 31, 2012. Shares of redeemable common stock were converted into 3,189,648 shares of common stock.
	In November 2012, the Company issued 100,000 shares of common stock in connection with a follow-on offering. The public offering price of the shares sold in the offering was $31.00 per share. The total gross proceeds from the follow-on offering to the Company were $3.1 million. After deducting underwriting discounts and commissions and offering expenses payable by the Company, the aggregate net proceeds received by the Company totaled approximately $2.5 million.
	Stock split
	On February 21, 2012, the Company executed a 14-for-1 forward stock split of the Company’s common stock. The consolidated financial statements for all periods and dates presented give retroactive effect to the stock split.
	Comprehensive income
	Components of comprehensive income include net income and foreign currency translation adjustments. Comprehensive income is disclosed in the accompanying consolidated statements of comprehensive income and consolidated statements of shareholders’ equity (deficit).
	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 with maturities of three months or less at the date of purchase. The Company maintains its cash in bank deposit accounts, which, at times, may exceed federally insured limits. The Company has not experienced any losses on such accounts.
	Marketable securities
	Marketable securities includes debt securities recorded at amortized cost. The classification of marketable securities as current or non-current is dependent upon the security’s maturity date. Securities with maturities of three months or less at the time of purchase are categorized as cash equivalents as described above. The Company reviews impairments associated with its marketable securities in accordance with the measurement guidance provided by Accounting Standards Codification (ASC) 320, Investments – Debt and Equity Securities, when determining the classification of impairment as “temporary” or “other-than-temporary.” The factors used to differentiate between temporary and other-than-temporary include assessment of the quality of the security, credit ratings actions and management’s intent to hold the security to maturity as well as other factors.
	Accounts receivable and allowance for doubtful accounts
	Accounts receivable are reported at the invoiced amount less an allowance for doubtful accounts. On a periodic basis, 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 been received within the period agreed upon in the invoice. Accounts receivable are written off after all collection efforts have been exhausted. Recoveries of trade receivables previously written off are recorded when received.
	Inventory
	Inventory consists primarily of raw materials, which are recorded at the lower of cost or market, using the average-cost method, which approximates first-in, first-out (FIFO) cost. The Company periodically reviews its inventory for slow-moving, damaged and discontinued items and provides allowances to reduce such items identified to their recoverable amounts.
	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 7 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 in service are not depreciated until the related asset is put into use.
	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 support the possibility of impairment, the Company will prepare a projection of the undiscounted future cash flows of the specific assets to determine if the assets are recoverable. If impairment exists based on these projections, an adjustment will be made to reduce the carrying amount of the specific assets to fair value.
	Revenue recognition
	The Company recognizes revenue when it is realized or realizable and earned when all of the following criteria are met: persuasive evidence of an arrangement exists, delivery has occurred or services have been rendered, the price to the buyer is fixed or determinable, and collectability is reasonably assured. Revenue is recognized upon transfer of title and risk of loss, which is generally upon the shipment of parts in our Firstcut product line and upon the shipment of the parts made from the mold in our Protomold product line. Freight billed to customers is included in revenues, and all freight expenses paid by the Company are included in cost of revenue. The Company also records a provision for estimated product returns and allowances in the period in which the related revenue is recorded. This provision against current gross revenue is based principally on historical rates of sales returns.
	Income taxes
	The Company accounts for income taxes in accordance with ASC 740, Income Taxes (ASC 740). Under this method, the Company determines tax assets and liabilities based upon the differences between the financial statement carrying amounts and the tax basis of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to affect taxable income. The tax consequences of most events recognized in the current year’s financial statements are included in determining income taxes currently payable. However, because tax laws and financial accounting standards differ in their recognition and measurement of assets, liabilities and equity, revenues, expenses, gains and losses, differences arise between the amount of taxable income and pretax financial income for a year and between the tax basis of assets or liabilities and their reported amounts in the financial statements. Because the Company assumes that the reported amounts of assets and liabilities will be recovered and settled, respectively, a difference between the tax basis of an asset or liability and its reported amount in the balance sheet will result in a taxable or a deductible amount in some future years when the related liabilities are settled or the reported amounts of the assets are recovered, giving rise to a deferred tax asset or liability.
	ASC 740 also clarifies the accounting for uncertainty in income taxes recognized in an enterprise’s financial statements by defining a criterion that an individual tax position must meet for any part of the benefit of that position to be recognized in an enterprise’s financial statements. Additionally, ASC 740 provides guidance on measurement, de-recognition, classification, interest and penalties, accounting in interim periods, disclosure, and transition.
	Stock-based compensation
	The Company accounts for stock-based compensation in accordance with ASC 718, Compensation—Stock Compensation (ASC 718). Under the fair value recognition provisions of ASC 718, the Company measures stock-based compensation cost at the grant date fair value and recognizes the compensation expense over the requisite service period, which is the vesting period, using a straight-line attribution method. The amount of stock-based compensation expense recognized during a period is based on the portion of the awards that are ultimately expected to vest. The Company estimates pre-vesting award forfeitures at the time of grant by analyzing historical data and revises those estimates in subsequent periods if actual forfeitures differ from those estimates. Ultimately, the total expense recognized over the vesting period will only be for those awards that vest. The Company’s awards are not eligible to vest early in the event of retirement, however, the awards vest early in the event of a change in control.
	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 $6.8 million, $5.9 million and $5.8 million for the years ended December 31, 2013, 2012 and 2011, respectively.
	Research and development
	Research and development expenses consist primarily of personnel and outside service costs related to the development of new processes and services, enhancement of existing services, quality assurance, and testing. The Company follows ASC 350-40, Internal-Use Software (ASC 350-40), in accounting for internally developed software. At December 31, 2013, 2012 and 2011, all internal use software projects were in the post-implementation/operation stage and therefore, no software development costs were capitalized. Research and development costs were approximately $11.9 million, $9.1 million and $5.2 million for the years ended December 31, 2013, 2012 and 2011, respectively.
	Foreign currency translation/transactions
	The Company translated the balance sheets of its foreign subsidiaries, Proto Labs Limited and Proto Labs G.K., 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 (deficit). Foreign currency transaction gains and losses are recognized in the consolidated statements of comprehensive income.
	Recent accounting pronouncements
	In February 2013, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2013-02, Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income (ASU 2013-02). This accounting update generally requires entities to provide information about the amounts reclassified out of accumulated other comprehensive income by component. In addition, the accounting update requires entities to present, either on the face of the statement where net income is presented or in the notes, significant amounts reclassified out of accumulated other comprehensive income by the respective line items of net income but only if the amount reclassified is required under U.S. GAAP to be reclassified to net income in its entirety in the same reporting period. For other amounts that are not required under U.S. GAAP to be reclassified in their entirety to net income, an entity is required to cross-reference to other disclosures required under U.S. GAAP that provide additional detail about those amounts. The amendment applies to public and nonpublic companies and is to be applied prospectively. For public entities, the amendment is effective for fiscal years, and interim periods within those years, beginning after December 15, 2012. The Company adopted this accounting guidance effective January 1, 2013. The adoption of ASU 2013-02 did not have a material impact on the Company’s financial statements.

Note_3_Net_Income_Per_Common_S

Note 3 - Net Income Per Common Share	12 Months Ended
	Dec. 31, 2013
Earnings Per Share [Abstract]	'
Earnings Per Share [Text Block]	'
	Note 3 – Net Income Per Common Share
	Basic and diluted net income per common share for 2013 and 2012 are presented in conformity with the single-class method, and for 2011 are presented in conformity with the two-class method required for participating securities. Prior to the Company’s IPO, the Company had outstanding redeemable convertible preferred stock. The holder of the Company’s redeemable convertible preferred stock was entitled to receive cumulative dividends at the rate of 8% per annum, payable prior and in preference to any dividends on any shares of the Company’s common stock. In addition, in the event a dividend was paid on common stock, the holder of redeemable convertible preferred stock was entitled to a proportionate share of any such dividend as if it was a holder of common stock (on an as-if converted basis). The Company considered its redeemable preferred stock to be participating securities and, in accordance with the two-class method, earnings allocated to preferred stock in 2011 have been excluded from the computation of basic and diluted net income per common share for those years.
	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.
	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)	2013		2012		2011
	Net Income	$	35,277	$	24,025	$	17,972
	Less: dividends on redeemable convertible preferred stock		-		-		(4,179	)
	Less: undistributed earnings allocated to preferred shareholders		-		-		(4,507	)
	Net income attributable to common shareholders	$	35,277	$	24,025	$	9,286
	Basic - weighted-average shares outstanding:		25,198,556		23,373,593		12,352,004
	Effect of dilutive securities:
	Employee stock options, warrants and other		661,185		1,070,072		1,587,068
	Diluted - weighted-average shares outstanding:		25,859,741		24,443,665		13,939,072
	Net income per share attributable to common shareholders:
	Basic	$	1.4	$	1.03	$	0.75
	Diluted	$	1.36	$	0.98	$	0.67
	Weighted-average diluted shares for the year ended December 31, 2011 excludes redeemable convertible preferred stock as it was anti-dilutive for the period.
	The following table sets forth the calculation of unaudited pro forma net income per basic and diluted share, which gives effect to the conversion of all outstanding shares of redeemable convertible preferred stock as if the conversion had occurred on January 1, 2011:
		Year Ended December 31,
	(in thousands, except share and per share amounts)	2013		2012		2011
	Net income attributable to common shareholders, as reported	$	35,277	$	24,025	$	9,286
	Dividends on redeemable convertible preferred stock		-		-		4,179
	Undistributed earnings allocated to preferred shareholders		-		-		4,507
	Pro forma net income	$	35,277	$	24,025	$	17,972
	Basic - weighted-average shares outstanding, as reported		25,198,556		23,373,593		12,352,004
	Add: common shares from conversion of redeemable convertible preferred shares		-		-		5,991,790
	Pro forma basic weighted average shares outstanding		25,198,556		23,373,593		18,343,794
	Effect of dilutive securities:
	Employee stock options, warrants and other		661,185		1,070,072		1,587,068
	Pro forma diluted - weighted-average shares outstanding:		25,859,741		24,443,665		19,930,862
	Pro forma net income per share attributable to common shareholders:
	Basic	$	1.4	$	1.03	$	0.98
	Diluted	$	1.36	$	0.98	$	0.9

Note_4_Fair_Value_Measurements

Note 4 - Fair Value Measurements	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Fair Value Disclosures [Text Block]	'
	Note 4 – Fair Value Measurements
	ASC 820, Fair Value Measurement (ASC 820), defines fair value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. ASC 820 also establishes a fair value hierarchy which requires classification based on observable and unobservable inputs when measuring fair value. There are three levels of inputs that may be used to measure fair value:
	Level 1—Quoted prices in active markets for identical assets or liabilities.
	Level 2—Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.
	Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.
	The Company’s cash equivalents measured at fair value as of December 31, 2013 and 2012, respectively, consist of money market mutual funds. The Company determines the fair value of these financial assets using Level I inputs.
	A summary of financial assets measured at fair value on a recurring basis is as follows:
		31-Dec-13						31-Dec-12
	(in thousands)	Level 1		Level 2		Level 3		Level 1		Level 2		Level 3
	Financial Assets:
	Cash and cash equivalents
	Money market mutual fund	$	5,524	$	-	$	-	$	16,164	$	-	$	-
	Total	$	5,524	$	-	$	-	$	16,164	$	-	$	-

Note_5_Marketable_Securities

Note 5 - Marketable Securities	12 Months Ended
	Dec. 31, 2013
Investments Schedule [Abstract]	'
Investment [Text Block]	'
	Note 5 – Marketable Securities
	The Company invests in short-term and long-term agency, municipal, corporate, commercial paper and other debt securities. The securities are categorized as held-to-maturity and are recorded at amortized cost. Categorization as held-to-maturity is based on the Company’s ability and intent to hold these securities to maturity. Information regarding the Company’s short-term and long-term marketable securities as of December 31, 2013 and 2012 is as follows:
		31-Dec-13
	(in thousands)	Amortized		Unrealized		Unrealized			Fair Value
		Cost		Gains		Losses
	U.S. government agency securities	$	21,713	$	2	$	(22	)	$	21,693
	Corporate debt securities		29,480		30		(20	)		29,490
	U.S. municipal securities		44,474		49		(22	)		44,501
	Certificates of deposit/time deposits		4,695		5		(8	)		4,692
	Total marketable securities	$	100,362	$	86	$	(72	)	$	100,376
		31-Dec-12
	(in thousands)	Amortized		Unrealized		Unrealized			Fair Value
		Cost		Gains		Losses
	U.S. government agency securities	$	23,011	$	2	$	(4	)	$	23,009
	Corporate debt securities		14,675		18		(14	)		14,679
	Commercial paper		1,500		-		-			1,500
	U.S. municipal securities		17,971		3		(12	)		17,962
	Certificates of deposit/time deposits		4,945		3		(1	)		4,947
	Total marketable securities	$	62,102	$	26	$	(31	)	$	62,097
	Fair values for the U.S. government agency and corporate debt securities are primarily determined based on quoted market prices (Level 1). Fair values for the U.S. municipal securities, certificates of deposit and commercial paper are primarily determined using dealer quotes or quoted market prices for similar securities (Level 2).
	The Company tests for other than temporary losses on a quarterly basis and has considered the unrealized losses indicated above to be temporary in nature. The investment policy adopted by the Company dictates that only investments in quality, highly rated debt securities are permitted. Those unrealized losses displayed above are the result of macroeconomic factors and are not indicative of the quality of the underlying security nor the issuer’s ability to pay its debt. The Company intends, and has the ability, to hold the investments to maturity and recover the full principal.
	Classification of marketable securities as current or non-current is based upon the security’s maturity date as of the date of these financial statements.
	The December 31, 2013 balance of held-to-maturity debt securities by contractual maturity is shown in the following table at amortized cost. Actual maturities may differ from contractual maturities because the issuers of the securities may have the right to prepay obligations without prepayment penalties.
	(in thousands)	December 31,
		2013
	Due in one year or less	$	36,339
	Due after one year through five years		64,023
	Total marketable securities	$	100,362

Note_6_Property_and_Equipment

Note 6 - Property and Equipment	12 Months Ended
	Dec. 31, 2013
Property, Plant and Equipment [Abstract]	'
Property, Plant and Equipment Disclosure [Text Block]	'
	Note 6 – Property and Equipment
	Property and equipment consists of the following:
		December 31,
	(in thousands)	2013			2012
	Land	$	2,830		$	2,830
	Buildings and improvements		13,655			13,114
	Machinery and equipment		48,707			39,209
	Computer hardware and software		5,957			5,019
	Leasehold improvements		2,932			2,921
	Construction in progress		9,196			1,903
	Capital leases - machinery and equipment		1,240			1,512
			84,517			66,508
	Accumulated depreciation and amortization		(28,416	)		(21,192	)
	Property and equipment, net	$	56,101		$	45,316
	Depreciation and amortization expense for the years ended December 31, 2013, 2012 and 2011 was $7.6 million, $6.1 million and $4.3 million, respectively.

Note_7_Inventory

Note 7 - Inventory	12 Months Ended
	Dec. 31, 2013
Inventory Disclosure [Abstract]	'
Inventory Disclosure [Text Block]	'
	Note 7 – Inventory
	Inventory consists primarily of raw materials, which are recorded at the lower of cost or market using the average-cost method, which approximates first-in, first-out (FIFO) cost. The Company periodically reviews its inventory for slow-moving, damaged and discontinued items and provides allowances to reduce such items identified to their recoverable amounts.
	The Company’s inventory consists of the following:
		December 31,
	(in thousands)	2013			2012
	Raw materials	$	4,875		$	4,174
	Work in process		410			530
	Total inventory		5,285			4,704
	Allowance for obsolescence		(119	)		(85	)
	Inventory, net of allowance	$	5,166		$	4,619

Note_8_Financing_Obligations

Note 8 - Financing Obligations	12 Months Ended
	Dec. 31, 2013
Debt Disclosure [Abstract]	'
Debt Disclosure [Text Block]	'
	Note 8 – Financing Obligations
	The Company’s debt consists of the following:
		December 31,
	(in thousands)	2013		2012
	Various obligations under capital leases, with interest rates from 4.5% to 7.4%, due in various monthly installments, including interest, through various dates through January 2016, secured by equipment	$	363	$	629
	Less current portion		204		273
	Long-term obligation	$	159	$	356
	Maturities on long-term debt obligations at December 31, 2013 are as follows:
	Years Ending December 31,
	(in thousands)
	2014	$	204
	2015		148
	2016		11
	2017		-
	2018		-
		$	363
	The Company’s revolving line of credit expired September 30, 2013. There were no advances made under the line of credit during 2013.

Note_9_Employee_Benefit_Plans

Note 9 - Employee Benefit Plans	12 Months Ended
	Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]	'
Pension and Other Postretirement Benefits Disclosure [Text Block]	'
	Note 9 – Employee Benefit Plans
	The Company maintains a 401(k) retirement plan that covers most of its employees. Under the plan, a full-time or regular part-time (over 20 hours/week) employee becomes a participant after completing six months of employment. Employees may elect to contribute up to 50 percent of regular gross pay, subject to federal law limits on the dollar amount that participants may contribute to the plan, each calendar year. The Company matches part of the employee contributions and may make a discretionary contribution to the plan. Total employer contributions were approximately $0.6 million, $0.5 million and $0.4 million for the years ended December 31, 2013, 2012 and 2011, respectively.
	The Company also sponsors a defined contribution retirement plan that covers the employees of Proto Labs Limited. Total employer contributions were immaterial for each of the years ended December 31, 2013, 2012 and 2011.

Note_10_StockBased_Compensatio

Note 10 - Stock-Based Compensation	12 Months Ended
	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]	'
	Note 10 – Stock-Based Compensation
	The Company has two equity incentive plans: the 2000 Stock Option Plan (2000 Plan) and the 2012 Long-Term Incentive Plan (2012 Plan). Upon the adoption of the 2012 Plan on February 21, 2012, all shares that were reserved under the 2000 Plan but not issued were assumed by the 2012 Plan. No additional shares will be issued under the 2000 Plan. Under the 2012 Plan, the Company has the ability to grant stock options, stock appreciation rights (SARs), restricted stock, stock units, other stock-based awards and cash incentive awards. Awards under the 2012 Plan have a maximum term of ten years from the date of grant. The compensation committee of the board of directors may provide that the vesting or payment of any award will be subject to the attainment of specified performance measures in addition to the satisfaction of any continued service requirements, and the compensation committee will determine whether such measures have been achieved. The per share exercise price of stock options and SARs granted under the 2012 Plan generally may not be less than the fair market value of a share of our common stock on the date of the grant.
	The Company’s 2012 Employee Stock Purchase Plan (ESPP) became effective on February 23, 2012. The ESPP allows eligible employees to purchase shares of the Company’s common stock at a discount through payroll deductions of up to 15 percent of their eligible compensation, subject to plan limitations. The ESPP provides for six-month offering periods, and at the end of each offering period, employees are able to purchase shares at 85 percent of the lower of the fair market value of the Company’s common stock on the first trading day of the offering period or on the last trading day of the offering period.
	Employees purchased 30,690 and 86,419 shares of common stock at an average exercise price of $36.74 and $13.60 during 2013 and 2012, respectively. As of December 31, 2013, 1,382,891 shares remained available for future issuance under the ESPP.
	The Company determines its stock-based compensation in accordance with ASC 718, which requires the measurement and recognition of compensation expense for all share-based payment awards made to employees and non-employee directors based on fair value.
	Determining the appropriate fair value model and calculating the fair value of stock option grants requires the input of highly 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, fair value of Company common stock, stock price volatility and forfeiture rates.
	The expected term represents the weighted average period that the Company’s stock options are expected to be outstanding. The expected term is based on the observed and expected time to post-vesting exercise of options by employees and non-employee directors and considers the impact of post-vesting award forfeitures. Prior to its IPO, the Company estimated the fair value of its common stock using the assistance of an independent third-party valuation specialist using the income and market approach. As the Company operated as a private company with a limited market for its stock from the Company’s inception to the completion of its IPO on February 29, 2012, the Company estimates its stock price volatility based on the volatility of a peer group of comparable publicly traded companies for which historical information is available. 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 anticipate paying, any cash dividends in the foreseeable future and, therefore, the Company uses an expected dividend yield of zero in the option pricing model. In order to properly attribute compensation expense, the Company is required to estimate pre-vesting forfeitures at the time of grant and revise those estimates in subsequent periods if actual forfeitures differ from those estimates. The Company uses historical data to estimate pre-vesting forfeitures and record stock-based compensation expense for those awards that are expected to vest. If the Company’s actual forfeiture rate is materially different from its estimate, stock-based compensation expense could be significantly different from what has been recorded. The Company allocates stock-based compensation expense on a straight-line basis over the requisite service period.
	The following table summarizes stock-based compensation expense for the years ended December 31, 2013, 2012 and 2011, respectively:
			Year Ended December 31,
	(in thousands)		2013				2012				2011
	Stock options and other		$	3,084			$	2,539			$	1,130
	Employee stock purchase plan			377				500				-
	Total stock-based compensation expense		$	3,461			$	3,039			$	1,130
	Cost of revenue		$	316			$	335			$	78
	Operating expenses:
	Marketing and sales			610				418				215
	Research and development			754				486				274
	General and administrative			1,781				1,800				563
	Total stock-based compensation expense		$	3,461			$	3,039			$	1,130
	Income tax benefits			(847	)			(844	)			(338	)
	Total stock-based compensation expense, net of tax		$	2,614			$	2,195			$	792
	The following table provides the assumptions used in the Black-Scholes option pricing model for the years ended December 31, 2013, 2012 and 2011:
			Year Ended December 31,
			2013												2012						2011
	Risk-free interest rate		1.03				-					1.98%			0.95		-	1.16%				3.68%
	Expected life (years)		5.5				-					6.5			5.5		-	6.5				5
	Expected volatility		49.36				-					53.54%			53		-	53.14%				47.32%
	Expected dividend yield						0%										0%					0%
	Weighted average grant date fair value						$25.86										$14.79					$8.99
	The following table summarizes stock option activity and the weighted average exercise price for the years ended December 31, 2013, 2012 and 2011:
			Stock Options				Weighted-
							Average
							Exercise Price
	Options outstanding at January 1, 2011			2,039,338			$	5.25
	Granted			224,000				20.07
	Exercised			(164,038	)			0.29
	Cancelled			-				-
	Options outstanding at December 31, 2011			2,099,300				6.18
	Granted			259,800				28.67
	Exercised			(667,243	)			2.41
	Cancelled			(500	)			30.58
	Options outstanding at December 31, 2012			1,691,357				11.11
	Granted			187,615				49.69
	Exercised			(695,777	)			7.79
	Cancelled			(39,945	)			23.48
	Options outstanding at December 31, 2013			1,143,250			$	19.03
	Exercisable at December 31, 2013			458,219			$	9.46
	The outstanding options generally have a term of 10 years. For employees, options that have been granted become exercisable ratably over the vesting period, which is generally a 5-year period, beginning on the first anniversary of the grant date, subject to the employee’s continuing service to the Company. For directors, options generally become exercisable in full on the first anniversary of the grant date.
	The total intrinsic value of options exercised during the years ended December 31, 2013, 2012 and 2011, was $33.2 million, $19.6 million and $2.5 million, respectively. The aggregate intrinsic value represents the cumulative difference between the fair market value of the underlying common stock and the option exercise prices.
	For options outstanding at December 31, 2013, the weighted-average remaining contractual term was 7.0 years and the aggregate intrinsic value was $59.6 million. For options exercisable at December 31, 2013, the weighted-average remaining contractual term was 5.7 years and the aggregate intrinsic value was $28.3 million. Refer to the table below for additional information.
	The following table summarizes information about stock options outstanding at December 31, 2013:
						Options Outstanding, Vested and Expected to Vest										Options Exercisable
	Range of					Number				Weighted				Weighted		Number			Weighted
	Exercise Prices					Outstanding				Average Remaining				Average		Exercisable			Average
										Contractual Life				Exercise					Exercise
														Price ($)					Price ($)
	$0.57	to	$5.56				200,466				3.36			$	3.54		168,266		$	3.15
		$7.86					445,675				6.97				7.86		210,475			7.86
		$20.07					116,600				7.47				20.07		28,867			20.07
	$30.58	to	$36.41				200,979				8.41				31.16		50,611			31.04
	$47.08	to	$78.28				179,530				9.22				49.81		-			-
	The fair value of share-based payment transactions is recognized in the consolidated statements of comprehensive income. As of December 31, 2013, there was $6.5 million of total unrecognized compensation cost related to unvested stock options, which is expected to be recognized over a weighted average period of 2.6 years. The total fair value of options vested was $2.4 million, $1.3 million and $5.6 million for the years ended December 31, 2013, 2012 and 2011, respectively.
	The following table presents the assumptions used to estimate the fair value of the ESPP during the years ended December 31, 2013 and 2012:
		Year ended December 31,
		2013					2012
Risk-free interest rate		0.11	-	0.13%			0.13	-	0.16%
Expected life (months)			6				6.00	-	8.5
Expected volatility		39.8	-	53.32%			53	-	53.14%
Expected dividend yield			0%					0%

Note_11_Commitments

Note 11 - Commitments	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies Disclosure [Text Block]	'
	Note 11 – Commitments
	The Company leases property from third parties. The Company leases a portion of its U.S. facilities, and the lease term expires in July 2017. The Company leases office and manufacturing space in the United Kingdom, and the initial term expires in February 2016. The Company also leases office space in France, Germany and Italy with terms expiring at various times from 2014 to 2019. The Company leases an office and manufacturing space in Japan, and the initial term expires in November 2021. The Company has the ability to terminate this lease, with no penalty, upon six months’ notice.
	As a condition of the lease of the UK facility, the Company received a rent holiday for the full year of 2011. The expense related to the full term of the lease is being recognized on a straight-line basis in accordance with ASC 840, Leases (ASC 840).
	In addition to those property leases described above, the Company has acquired capital equipment under capital leases.
	Future minimum commitments under non-cancelable leases at December 31, 2013, are as follows:
		Capital		Operating
		Leases		Leases
		(in thousands)
	Years Ending December 31,
	2014	$	222	$	1,242
	2015		154		1,206
	2016		11		664
	2017		-		483
	2018		-		378
	After 2018		-		1,340
	Total future minimum lease payments		387	$	5,313
	Less interest cost		24
	Net present value of minimum lease payments	$	363
	Rental expense was approximately $1.2 million, $1.3 million and $0.8 million for the years ended December 31, 2013, 2012 and 2011, respectively.

Note_12_Accumulated_Other_Comp

Note 12 - Accumulated Other Comprehensive Income	12 Months Ended
	Dec. 31, 2013
Partners' Capital, Comprehensive Income [Abstract]	'
Disclosure of Reclassification Amount [Text Block]	'
	Note 12 – Accumulated Other Comprehensive Income
	Other comprehensive income (loss) is comprised entirely of foreign currency translation adjustments. The following table presents the changes in accumulated other comprehensive income balances for the years ending December 31, 2013, 2012 and 2011, respectively:
		Year Ended December 31,
	(in thousands)	2013			2012			2011
	Foreign currency translation adjustment, net of tax
	Balance at beginning of period	$	(928	)	$	(738	)	$	(458	)
	Other comprehensive income before reclassifications		(163	)		(190	)		(280	)
	Amounts reclassified from accumulated other comprehensive income		-			-			-
	Net current-period other comprehensive income		(163	)		(190	)		(280	)
	Balance at end of period	$	(1,091	)	$	(928	)	$	(738	)

Note_13_Income_Taxes

Note 13 - Income Taxes	12 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Income Tax Disclosure [Text Block]	'
	Note 13 – Income Taxes
	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, 2013, 2012 and 2011, the Company recorded an income tax provision of $16.3 million, $10.9 million and $8.8 million, respectively. The effective income tax rate for the years ended December 31, 2013, 2012 and 2011 was 31.6 percent, 31.3 percent and 32.8 percent, respectively.
	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)	2013			2012			2011
	Domestic	$	45,659		$	34,653		$	26,699
	Foreign		5,919			316			56
	Total	$	51,578		$	34,969		$	26,755
	Significant components of the provision for income taxes for the following periods are as follows:
		Year Ended December 31,
	(in thousands)	2013			2012			2011
	Current:
	Federal	$	13,934		$	10,288		$	5,561
	State		379			217			291
	Foreign		1,762			761			700
	Deferred
	Federal		168			(398	)		2,211
	State		(39	)		65			9
	Foreign		(335	)		(1,060	)		(1,018	)
	Valuation Allowance		432			1,071			1,029
	Total	$	16,301		$	10,944		$	8,783
	A reconciliation of the federal statutory income tax rate to the effective tax rate is as follows:
		Year Ended December 31,
		2013			2012			2011
	Federal tax statutory rate		35	%		35	%		35	%
	State tax (net of federal benefit)		0.6			0.8			0.7
	Qualified subsidiary election		(0.8	)		(3.5	)		(3.8	)
	Valuation allowance against deferred tax assets		0.8			3.5			3.8
	Research and development credit		(1.8	)		(0.4	)		(0.3	)
	Foreign rate differential		(1.6	)		(1.1	)		(0.7	)
	Tax reserves		0.6			0			0
	Domestic manufacturing deduction		(1.1	)		(2.9	)		(1.7	)
	Provision to return		0.2			(0.1	)		(0.1	)
	Miscellaneous		(0.3	)		0			(0.1	)
	Total		31.6	%		31.3	%		32.8	%
	On January 2, 2013, the American Taxpayer Relief Act of 2012 (the Act) was signed into law. Included in the Act was the extension of the research and development credit for years 2012 and 2013. As the Act was enacted during 2013, the federal portion of the 2012 research and development credit was recognized in the first quarter of 2013. The Company recorded a tax benefit of $0.5 million for the 2012 federal research credit, which translated to an effective income tax rate reduction of 0.9 percent for the year ended December 31, 2013.
	Significant components of deferred tax assets and liabilities are as follows:
		December 31,
	(in thousands)	2013			2012
	Deferred tax assets:
	Accrued expenses	$	243		$	327
	Warrants and stock options		1,434			1,034
	Intangibles		112			117
	Inventories		136			114
	Other assets		217			211
	Net operating loss		3,240			3,931
	Less valuation allowance		(3,642	)		(4,065	)
	Total deferred tax assets		1,740			1,669
	Deferred tax liabilities:
	Depreciation		(4,941	)		(4,406	)
	Total deferred tax liabilities		(4,941	)		(4,406	)
	Net deferred tax liability	$	(3,201	)	$	(2,737	)
	The Company has recorded no U.S. deferred taxes related to the undistributed earnings of its non-U.S. subsidiaries as of December 31, 2013. Such amounts are intended to be reinvested outside of the United States indefinitely. It is not practicable to estimate the amount of additional tax that might be payable on the foreign earnings. At December 31, 2013, 2012 and 2011, the Company had accumulated undistributed earnings in non-U.S. subsidiaries of $11.8 million, $6.4 million and $3.6 million, respectively.
	As of December 31, 2013, the Company had estimated net operating loss carry forwards of $8.5 million for tax purposes. The net operating losses relate to Japan and can be carried forward for nine years but are limited to 80 percent of taxable income. The net operating losses begin to expire at various dates between 2014 and 2022. Our Japan operations are taxed both by local authorities and in the U.S. Accordingly, a portion of Japan’s net operating losses have been recognized as a benefit in the U.S.
	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 that a portion of the deferred tax assets will not be realized. The Company's valuation allowances of $3.6 million and $4.1 million at December 31, 2013 and December 31, 2012, respectively, reduce the carrying value of deferred tax assets associated with certain net operating loss carry forwards and other assets with insufficient positive evidence for recognition. The decrease in the valuation allowance is attributable to fluctuations in foreign currency.
	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 longer subject to U.S. federal, state, or foreign income tax examinations by tax authorities for years before 2010.
	The Company has liabilities related to unrecognized tax benefits totaling $0.7 million and $0.4 million at December 31, 2013 and 2012, respectively, that if recognized would result in a reduction of the Company’s effective tax rate. The liabilities are classified as other long-term liabilities in the accompanying consolidated balance sheets. The Company does not anticipate that total unrecognized tax benefits will materially change in the next twelve months. The Company recognizes interest and penalties related to income tax matters in income tax expense and reports the liability in current or long-term income taxes payable as appropriate. Interest and penalties were immaterial for each of the years ended December 31, 2013, 2012 and 2011. A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:
		December 31,
		2013			2012
	Balance at beginning of period	$	392		$	392
	Additions for tax positions of current year		64			-
	Additions for tax positions of prior years		239			-
	Balance at period end	$	695		$	392

Note_14_Warrants

Note 14 - Warrants	12 Months Ended
	Dec. 31, 2013
Warrants Disclosure [Abstract]	'
Warrants Disclosure [Text Block]	'
	Note 14 – Warrants
	At December 31, 2011 the Company had issued and outstanding fully vested warrants for the purchase of up to 105,000 shares at an exercise price of $1.79 per share. During 2012, all of the warrants outstanding were exercised, resulting in the issuance of 105,000 shares of common stock. No common stock warrants remained outstanding at December 31, 2013 or 2012, respectively.

Note_15_Redeemable_Convertible

Note 15 - Redeemable Convertible Preferred Stock and Redeemable Common Stock	12 Months Ended
	Dec. 31, 2013
Redeemable Convertible Preferred Stock And Redeemable Common Stock Disclosure [Abstract]	'
Redeemable Convertible Preferred Stock And Redeemable Common Stock Disclosure [Text Block]	'
	Note 15 – Redeemable Convertible Preferred Stock and Redeemable Common Stock
	In August 2008, the Company sold 427,985 shares of redeemable convertible preferred stock. Upon completion of its IPO in February 2012, these shares were converted to common stock. Refer to Note 2 for additional information.
	During 2008, the Company executed an Investors’ Rights Agreement with certain investors that supplements the Stock Purchase Agreement executed in 2005. The Investors’ Rights Agreement provides the investors certain rights, including the right to require the Company to redeem the 3,189,648 shares of common stock owned by the investor at the then current fair market value. Upon completion of its IPO in February 2012, these redemption rights expired and the shares of redeemable common stock were converted into common stock.

Note_16_Litigation

Note 16 - Litigation	12 Months Ended
	Dec. 31, 2013
Disclosure Text Block Supplement [Abstract]	'
Legal Matters and Contingencies [Text Block]	'
	Note 16 – Litigation
	From time to time, the Company may be subject to various legal proceedings and claims that arise in the ordinary course of its business. Although the results of litigation and claims cannot be predicted with certainty, the Company does not believe it is a party to any litigation the outcome of which, if determined adversely, would individually or in the aggregate be reasonably expected to have a material adverse effect on its business.

Note_17_Segment_and_Geographic

Note 17 - Segment and Geographic Information	12 Months Ended
	Dec. 31, 2013
Segment Reporting [Abstract]	'
Segment Reporting Disclosure [Text Block]	'
	Note 17 – Segment and Geographic Information
	The Company’s CEO, who is the Company’s chief operating decision maker, makes decisions to operate the business and allocate resources based on review of operating results at the consolidated level. As a result, the Company has determined that it has only one operating segment, and therefore, one reportable segment.
	The Company’s revenue is derived from its Protomold injection molding and Firstcut computer numerical control (CNC) machining services. Total revenue by service is as follows:
		Year Ended December 31,
	(in thousands)	2013		2012		2011
	Revenue:
	Protomold	$	115,069	$	90,371	$	74,090
	First Cut		48,043		35,620		24,849
	Total revenue	$	163,112	$	125,991	$	98,939
	Revenue from external customers based on the billing location of the end user customer and long-lived assets by geographic region are as follows:
		Year Ended December 31,
	(in thousands)	2013		2012		2011
	Revenue:
	United States	$	119,870	$	94,866	$	73,010
	International		43,242		31,125		25,929
	Total revenue	$	163,112	$	125,991	$	98,939
		December 31,
	(in thousands)	2013		2012
	Long-lived assets:
	United States	$	48,381	$	37,869
	International		7,720		7,447
	Total long-lived assets	$	56,101	$	45,316

Accounting_Policies_by_Policy_

Accounting Policies, by Policy (Policies)	12 Months Ended
	Dec. 31, 2013
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, Proto Labs Limited and Proto Labs G.K. All significant intercompany accounts and transactions have been eliminated in consolidation.
Reclassification, Policy [Policy Text Block]	'
	Reclassifications
	Certain reclassifications have been made to the Consolidated Statement of Cash Flows for the year ended December 31, 2012 to conform to the presentation used in the December 31, 2013 Consolidated Statement of Cash Flows. The reclassifications had no effect on the increase in cash and cash equivalents as previously reported.
	Certain reclassifications have been made to the significant components of deferred tax assets and liabilities as of December 31, 2012 as presented in Note 13 – Income Taxes to conform to the presentation of components of deferred tax assets and liabilities as of December 31, 2013. The reclassification had no effect on the total deferred assets or liabilities as previously reported.
Initial Public Offering [Policy Text Block]	'
	Public offerings
	In February 2012, the Company issued 4.9 million shares of common stock (including the exercise of the underwriters’ over-allotment shares) in conjunction with its initial public offering (IPO). The public offering price of the shares sold in the offering was $16.00 per share. The total gross proceeds from the IPO to the Company were $79.1 million. After deducting underwriting discounts and commissions and offering expenses payable by the Company, the aggregate net proceeds received by the Company totaled approximately $71.5 million.
	Immediately prior to the consummation of the IPO, all outstanding shares of redeemable convertible preferred stock and redeemable common stock were converted into shares of common stock. Shares of redeemable convertible preferred stock were converted into 5,991,790 shares of common stock. All previously accrued dividends on the preferred stock were released back into retained earnings as of December 31, 2012. Shares of redeemable common stock were converted into 3,189,648 shares of common stock.
	In November 2012, the Company issued 100,000 shares of common stock in connection with a follow-on offering. The public offering price of the shares sold in the offering was $31.00 per share. The total gross proceeds from the follow-on offering to the Company were $3.1 million. After deducting underwriting discounts and commissions and offering expenses payable by the Company, the aggregate net proceeds received by the Company totaled approximately $2.5 million.
Stock Split [Policy Text Block]	'
	Stock split
	On February 21, 2012, the Company executed a 14-for-1 forward stock split of the Company’s common stock. The consolidated financial statements for all periods and dates presented give retroactive effect to the stock split.
Comprehensive Income, Policy [Policy Text Block]	'
	Comprehensive income
	Components of comprehensive income include net income and foreign currency translation adjustments. Comprehensive income is disclosed in the accompanying consolidated statements of comprehensive income and consolidated statements of shareholders’ equity (deficit).
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 with maturities of three months or less at the date of purchase. The Company maintains its cash in bank deposit accounts, which, at times, may exceed federally insured limits. The Company has not experienced any losses on such accounts.
Marketable Securities, Policy [Policy Text Block]	'
	Marketable securities
	Marketable securities includes debt securities recorded at amortized cost. The classification of marketable securities as current or non-current is dependent upon the security’s maturity date. Securities with maturities of three months or less at the time of purchase are categorized as cash equivalents as described above. The Company reviews impairments associated with its marketable securities in accordance with the measurement guidance provided by Accounting Standards Codification (ASC) 320, Investments – Debt and Equity Securities, when determining the classification of impairment as “temporary” or “other-than-temporary.” The factors used to differentiate between temporary and other-than-temporary include assessment of the quality of the security, credit ratings actions and management’s intent to hold the security to maturity as well as other factors.
Trade and Other Accounts Receivable, Policy [Policy Text Block]	'
	Accounts receivable and allowance for doubtful accounts
	Accounts receivable are reported at the invoiced amount less an allowance for doubtful accounts. On a periodic basis, 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 been received within the period agreed upon in the invoice. Accounts receivable are written off after all collection efforts have been exhausted. Recoveries of trade receivables previously written off are recorded when received.
Inventory, Policy [Policy Text Block]	'
	Inventory
	Inventory consists primarily of raw materials, which are recorded at the lower of cost or market, using the average-cost method, which approximates first-in, first-out (FIFO) cost. The Company periodically reviews its inventory for slow-moving, damaged and discontinued items and provides allowances to reduce such items identified to their recoverable amounts.
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 7 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 in service are not depreciated until the related asset is put into use.
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 support the possibility of impairment, the Company will prepare a projection of the undiscounted future cash flows of the specific assets to determine if the assets are recoverable. If impairment exists based on these projections, an adjustment will be made to reduce the carrying amount of the specific assets to fair value.
Revenue Recognition, Policy [Policy Text Block]	'
	Revenue recognition
	The Company recognizes revenue when it is realized or realizable and earned when all of the following criteria are met: persuasive evidence of an arrangement exists, delivery has occurred or services have been rendered, the price to the buyer is fixed or determinable, and collectability is reasonably assured. Revenue is recognized upon transfer of title and risk of loss, which is generally upon the shipment of parts in our Firstcut product line and upon the shipment of the parts made from the mold in our Protomold product line. Freight billed to customers is included in revenues, and all freight expenses paid by the Company are included in cost of revenue. The Company also records a provision for estimated product returns and allowances in the period in which the related revenue is recorded. This provision against current gross revenue is based principally on historical rates of sales returns.
Income Tax, Policy [Policy Text Block]	'
	Income taxes
	The Company accounts for income taxes in accordance with ASC 740, Income Taxes (ASC 740). Under this method, the Company determines tax assets and liabilities based upon the differences between the financial statement carrying amounts and the tax basis of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to affect taxable income. The tax consequences of most events recognized in the current year’s financial statements are included in determining income taxes currently payable. However, because tax laws and financial accounting standards differ in their recognition and measurement of assets, liabilities and equity, revenues, expenses, gains and losses, differences arise between the amount of taxable income and pretax financial income for a year and between the tax basis of assets or liabilities and their reported amounts in the financial statements. Because the Company assumes that the reported amounts of assets and liabilities will be recovered and settled, respectively, a difference between the tax basis of an asset or liability and its reported amount in the balance sheet will result in a taxable or a deductible amount in some future years when the related liabilities are settled or the reported amounts of the assets are recovered, giving rise to a deferred tax asset or liability.
	ASC 740 also clarifies the accounting for uncertainty in income taxes recognized in an enterprise’s financial statements by defining a criterion that an individual tax position must meet for any part of the benefit of that position to be recognized in an enterprise’s financial statements. Additionally, ASC 740 provides guidance on measurement, de-recognition, classification, interest and penalties, accounting in interim periods, disclosure, and transition.
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 (ASC 718). Under the fair value recognition provisions of ASC 718, the Company measures stock-based compensation cost at the grant date fair value and recognizes the compensation expense over the requisite service period, which is the vesting period, using a straight-line attribution method. The amount of stock-based compensation expense recognized during a period is based on the portion of the awards that are ultimately expected to vest. The Company estimates pre-vesting award forfeitures at the time of grant by analyzing historical data and revises those estimates in subsequent periods if actual forfeitures differ from those estimates. Ultimately, the total expense recognized over the vesting period will only be for those awards that vest. The Company’s awards are not eligible to vest early in the event of retirement, however, the awards vest early in the event of a change in control.
	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, Policy [Policy Text Block]	'
	Advertising costs
	Advertising is expensed as incurred and was approximately $6.8 million, $5.9 million and $5.8 million for the years ended December 31, 2013, 2012 and 2011, respectively.
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 services, enhancement of existing services, quality assurance, and testing. The Company follows ASC 350-40, Internal-Use Software (ASC 350-40), in accounting for internally developed software. At December 31, 2013, 2012 and 2011, all internal use software projects were in the post-implementation/operation stage and therefore, no software development costs were capitalized. Research and development costs were approximately $11.9 million, $9.1 million and $5.2 million for the years ended December 31, 2013, 2012 and 2011, respectively.
Foreign Currency Transactions and Translations Policy [Policy Text Block]	'
	Foreign currency translation/transactions
	The Company translated the balance sheets of its foreign subsidiaries, Proto Labs Limited and Proto Labs G.K., 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 (deficit). Foreign currency transaction gains and losses are recognized in the consolidated statements of comprehensive income.
New Accounting Pronouncements, Policy [Policy Text Block]	'
	Recent accounting pronouncements
	In February 2013, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2013-02, Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income (ASU 2013-02). This accounting update generally requires entities to provide information about the amounts reclassified out of accumulated other comprehensive income by component. In addition, the accounting update requires entities to present, either on the face of the statement where net income is presented or in the notes, significant amounts reclassified out of accumulated other comprehensive income by the respective line items of net income but only if the amount reclassified is required under U.S. GAAP to be reclassified to net income in its entirety in the same reporting period. For other amounts that are not required under U.S. GAAP to be reclassified in their entirety to net income, an entity is required to cross-reference to other disclosures required under U.S. GAAP that provide additional detail about those amounts. The amendment applies to public and nonpublic companies and is to be applied prospectively. For public entities, the amendment is effective for fiscal years, and interim periods within those years, beginning after December 15, 2012. The Company adopted this accounting guidance effective January 1, 2013. The adoption of ASU 2013-02 did not have a material impact on the Company’s financial statements.

Note_3_Net_Income_Per_Common_S1

Note 3 - Net Income Per Common Share (Tables)	12 Months Ended
	Dec. 31, 2013
Earnings Per Share [Abstract]	'
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	'
		Year Ended December 31,
	(in thousands, except share and per share amounts)	2013		2012		2011
	Net Income	$	35,277	$	24,025	$	17,972
	Less: dividends on redeemable convertible preferred stock		-		-		(4,179	)
	Less: undistributed earnings allocated to preferred shareholders		-		-		(4,507	)
	Net income attributable to common shareholders	$	35,277	$	24,025	$	9,286
	Basic - weighted-average shares outstanding:		25,198,556		23,373,593		12,352,004
	Effect of dilutive securities:
	Employee stock options, warrants and other		661,185		1,070,072		1,587,068
	Diluted - weighted-average shares outstanding:		25,859,741		24,443,665		13,939,072
	Net income per share attributable to common shareholders:
	Basic	$	1.4	$	1.03	$	0.75
	Diluted	$	1.36	$	0.98	$	0.67
Schedule of Earnings Per Share Basic and Diluted Pro Forma [Table Text Block]	'
		Year Ended December 31,
	(in thousands, except share and per share amounts)	2013		2012		2011
	Net income attributable to common shareholders, as reported	$	35,277	$	24,025	$	9,286
	Dividends on redeemable convertible preferred stock		-		-		4,179
	Undistributed earnings allocated to preferred shareholders		-		-		4,507
	Pro forma net income	$	35,277	$	24,025	$	17,972
	Basic - weighted-average shares outstanding, as reported		25,198,556		23,373,593		12,352,004
	Add: common shares from conversion of redeemable convertible preferred shares		-		-		5,991,790
	Pro forma basic weighted average shares outstanding		25,198,556		23,373,593		18,343,794
	Effect of dilutive securities:
	Employee stock options, warrants and other		661,185		1,070,072		1,587,068
	Pro forma diluted - weighted-average shares outstanding:		25,859,741		24,443,665		19,930,862
	Pro forma net income per share attributable to common shareholders:
	Basic	$	1.4	$	1.03	$	0.98
	Diluted	$	1.36	$	0.98	$	0.9

Note_4_Fair_Value_Measurements1

Note 4 - Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Fair Value, Assets Measured on Recurring Basis [Table Text Block]	'
		31-Dec-13						31-Dec-12
	(in thousands)	Level 1		Level 2		Level 3		Level 1		Level 2		Level 3
	Financial Assets:
	Cash and cash equivalents
	Money market mutual fund	$	5,524	$	-	$	-	$	16,164	$	-	$	-
	Total	$	5,524	$	-	$	-	$	16,164	$	-	$	-

Note_5_Marketable_Securities_T

Note 5 - Marketable Securities (Tables)	12 Months Ended
	Dec. 31, 2013
Investments Schedule [Abstract]	'
Held-to-maturity Securities [Table Text Block]	'
		31-Dec-13
	(in thousands)	Amortized		Unrealized		Unrealized			Fair Value
		Cost		Gains		Losses
	U.S. government agency securities	$	21,713	$	2	$	(22	)	$	21,693
	Corporate debt securities		29,480		30		(20	)		29,490
	U.S. municipal securities		44,474		49		(22	)		44,501
	Certificates of deposit/time deposits		4,695		5		(8	)		4,692
	Total marketable securities	$	100,362	$	86	$	(72	)	$	100,376
		31-Dec-12
	(in thousands)	Amortized		Unrealized		Unrealized			Fair Value
		Cost		Gains		Losses
	U.S. government agency securities	$	23,011	$	2	$	(4	)	$	23,009
	Corporate debt securities		14,675		18		(14	)		14,679
	Commercial paper		1,500		-		-			1,500
	U.S. municipal securities		17,971		3		(12	)		17,962
	Certificates of deposit/time deposits		4,945		3		(1	)		4,947
	Total marketable securities	$	62,102	$	26	$	(31	)	$	62,097
Investments Classified by Contractual Maturity Date [Table Text Block]	'
	(in thousands)	December 31,
		2013
	Due in one year or less	$	36,339
	Due after one year through five years		64,023
	Total marketable securities	$	100,362

Note_6_Property_and_Equipment_

Note 6 - Property and Equipment (Tables)	12 Months Ended
	Dec. 31, 2013
Property, Plant and Equipment [Abstract]	'
Property, Plant and Equipment [Table Text Block]	'
		December 31,
	(in thousands)	2013			2012
	Land	$	2,830		$	2,830
	Buildings and improvements		13,655			13,114
	Machinery and equipment		48,707			39,209
	Computer hardware and software		5,957			5,019
	Leasehold improvements		2,932			2,921
	Construction in progress		9,196			1,903
	Capital leases - machinery and equipment		1,240			1,512
			84,517			66,508
	Accumulated depreciation and amortization		(28,416	)		(21,192	)
	Property and equipment, net	$	56,101		$	45,316

Note_7_Inventory_Tables

Note 7 - Inventory (Tables)	12 Months Ended
	Dec. 31, 2013
Inventory Disclosure [Abstract]	'
Schedule of Inventory, Current [Table Text Block]	'
		December 31,
	(in thousands)	2013			2012
	Raw materials	$	4,875		$	4,174
	Work in process		410			530
	Total inventory		5,285			4,704
	Allowance for obsolescence		(119	)		(85	)
	Inventory, net of allowance	$	5,166		$	4,619

Note_8_Financing_Obligations_T

Note 8 - Financing Obligations (Tables)	12 Months Ended
	Dec. 31, 2013
Debt Disclosure [Abstract]	'
Schedule of Debt [Table Text Block]	'
		December 31,
	(in thousands)	2013		2012
	Various obligations under capital leases, with interest rates from 4.5% to 7.4%, due in various monthly installments, including interest, through various dates through January 2016, secured by equipment	$	363	$	629
	Less current portion		204		273
	Long-term obligation	$	159	$	356
Schedule of Maturities of Long-term Debt [Table Text Block]	'
	Years Ending December 31,
	(in thousands)
	2014	$	204
	2015		148
	2016		11
	2017		-
	2018		-
		$	363

Note_10_StockBased_Compensatio1

Note 10 - Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]	'
			Year Ended December 31,
	(in thousands)		2013				2012				2011
	Stock options and other		$	3,084			$	2,539			$	1,130
	Employee stock purchase plan			377				500				-
	Total stock-based compensation expense		$	3,461			$	3,039			$	1,130
	Cost of revenue		$	316			$	335			$	78
	Operating expenses:
	Marketing and sales			610				418				215
	Research and development			754				486				274
	General and administrative			1,781				1,800				563
	Total stock-based compensation expense		$	3,461			$	3,039			$	1,130
	Income tax benefits			(847	)			(844	)			(338	)
	Total stock-based compensation expense, net of tax		$	2,614			$	2,195			$	792
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	'
			Year Ended December 31,
			2013												2012						2011
	Risk-free interest rate		1.03				-					1.98%			0.95		-	1.16%				3.68%
	Expected life (years)		5.5				-					6.5			5.5		-	6.5				5
	Expected volatility		49.36				-					53.54%			53		-	53.14%				47.32%
	Expected dividend yield						0%										0%					0%
	Weighted average grant date fair value						$25.86										$14.79					$8.99
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]	'
			Stock Options				Weighted-
							Average
							Exercise Price
	Options outstanding at January 1, 2011			2,039,338			$	5.25
	Granted			224,000				20.07
	Exercised			(164,038	)			0.29
	Cancelled			-				-
	Options outstanding at December 31, 2011			2,099,300				6.18
	Granted			259,800				28.67
	Exercised			(667,243	)			2.41
	Cancelled			(500	)			30.58
	Options outstanding at December 31, 2012			1,691,357				11.11
	Granted			187,615				49.69
	Exercised			(695,777	)			7.79
	Cancelled			(39,945	)			23.48
	Options outstanding at December 31, 2013			1,143,250			$	19.03
	Exercisable at December 31, 2013			458,219			$	9.46
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]	'
						Options Outstanding, Vested and Expected to Vest										Options Exercisable
	Range of					Number				Weighted				Weighted		Number			Weighted
	Exercise Prices					Outstanding				Average Remaining				Average		Exercisable			Average
										Contractual Life				Exercise					Exercise
														Price ($)					Price ($)
	$0.57	to	$5.56				200,466				3.36			$	3.54		168,266		$	3.15
		$7.86					445,675				6.97				7.86		210,475			7.86
		$20.07					116,600				7.47				20.07		28,867			20.07
	$30.58	to	$36.41				200,979				8.41				31.16		50,611			31.04
	$47.08	to	$78.28				179,530				9.22				49.81		-			-
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]	'
			Year ended December 31,
			2013					2012
	Risk-free interest rate		0.11	-	0.13%			0.13	-	0.16%
	Expected life (months)			6				6.00	-	8.5
	Expected volatility		39.8	-	53.32%			53	-	53.14%
	Expected dividend yield			0%					0%

Note_11_Commitments_Tables

Note 11 - Commitments (Tables)	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Schedule of Future Minimum Lease Payments for Capital Leases And Operating Leases [Table Text Block]	'
		Capital		Operating
		Leases		Leases
		(in thousands)
	Years Ending December 31,
	2014	$	222	$	1,242
	2015		154		1,206
	2016		11		664
	2017		-		483
	2018		-		378
	After 2018		-		1,340
	Total future minimum lease payments		387	$	5,313
	Less interest cost		24
	Net present value of minimum lease payments	$	363

Note_12_Accumulated_Other_Comp1

Note 12 - Accumulated Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 31, 2013
Partners' Capital, Comprehensive Income [Abstract]	'
Comprehensive Income (Loss) [Table Text Block]	'
		Year Ended December 31,
	(in thousands)	2013			2012			2011
	Foreign currency translation adjustment, net of tax
	Balance at beginning of period	$	(928	)	$	(738	)	$	(458	)
	Other comprehensive income before reclassifications		(163	)		(190	)		(280	)
	Amounts reclassified from accumulated other comprehensive income		-			-			-
	Net current-period other comprehensive income		(163	)		(190	)		(280	)
	Balance at end of period	$	(1,091	)	$	(928	)	$	(738	)

Note_13_Income_Taxes_Tables

Note 13 - Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]	'
		Year Ended December 31,
	(in thousands)	2013			2012			2011
	Domestic	$	45,659		$	34,653		$	26,699
	Foreign		5,919			316			56
	Total	$	51,578		$	34,969		$	26,755
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	'
		Year Ended December 31,
	(in thousands)	2013			2012			2011
	Current:
	Federal	$	13,934		$	10,288		$	5,561
	State		379			217			291
	Foreign		1,762			761			700
	Deferred
	Federal		168			(398	)		2,211
	State		(39	)		65			9
	Foreign		(335	)		(1,060	)		(1,018	)
	Valuation Allowance		432			1,071			1,029
	Total	$	16,301		$	10,944		$	8,783
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	'
		Year Ended December 31,
		2013			2012			2011
	Federal tax statutory rate		35	%		35	%		35	%
	State tax (net of federal benefit)		0.6			0.8			0.7
	Qualified subsidiary election		(0.8	)		(3.5	)		(3.8	)
	Valuation allowance against deferred tax assets		0.8			3.5			3.8
	Research and development credit		(1.8	)		(0.4	)		(0.3	)
	Foreign rate differential		(1.6	)		(1.1	)		(0.7	)
	Tax reserves		0.6			0			0
	Domestic manufacturing deduction		(1.1	)		(2.9	)		(1.7	)
	Provision to return		0.2			(0.1	)		(0.1	)
	Miscellaneous		(0.3	)		0			(0.1	)
	Total		31.6	%		31.3	%		32.8	%
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	'
		December 31,
	(in thousands)	2013			2012
	Deferred tax assets:
	Accrued expenses	$	243		$	327
	Warrants and stock options		1,434			1,034
	Intangibles		112			117
	Inventories		136			114
	Other assets		217			211
	Net operating loss		3,240			3,931
	Less valuation allowance		(3,642	)		(4,065	)
	Total deferred tax assets		1,740			1,669
	Deferred tax liabilities:
	Depreciation		(4,941	)		(4,406	)
	Total deferred tax liabilities		(4,941	)		(4,406	)
	Net deferred tax liability	$	(3,201	)	$	(2,737	)
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]	'
		December 31,
		2013			2012
	Balance at beginning of period	$	392		$	392
	Additions for tax positions of current year		64			-
	Additions for tax positions of prior years		239			-
	Balance at period end	$	695		$	392

Note_17_Segment_and_Geographic1

Note 17 - Segment and Geographic Information (Tables)	12 Months Ended
	Dec. 31, 2013
Segment Reporting [Abstract]	'
Revenue from External Customers by Products and Services [Table Text Block]	'
		Year Ended December 31,
	(in thousands)	2013		2012		2011
	Revenue:
	Protomold	$	115,069	$	90,371	$	74,090
	First Cut		48,043		35,620		24,849
	Total revenue	$	163,112	$	125,991	$	98,939
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]	'
		Year Ended December 31,
	(in thousands)	2013		2012		2011
	Revenue:
	United States	$	119,870	$	94,866	$	73,010
	International		43,242		31,125		25,929
	Total revenue	$	163,112	$	125,991	$	98,939
Long-lived Assets by Geographic Areas [Table Text Block]	'
		December 31,
	(in thousands)	2013		2012
	Long-lived assets:
	United States	$	48,381	$	37,869
	International		7,720		7,447
	Total long-lived assets	$	56,101	$	45,316

Note_2_Summary_of_Significant_1

Note 2 - Summary of Significant Accounting Policies (Details) (USD $)	1 Months Ended			12 Months Ended
	Nov. 30, 2012	Feb. 21, 2012	Feb. 29, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items]	'	'	'	'	'	'
Stock Issued During Period, Shares, New Issues (in Shares)	'	'	4,900,000	'	'	'
Share Price (in Dollars per share)	$31	'	$16	'	'	'
Proceeds from Issuance Initial Public Offering (in Dollars)	'	'	$79,100,000	'	$71,530,000	'
Proceeds From Issuance Initial Public Offering Net (in Dollars)	'	'	'	'	71,500,000	'
(in Shares)	100,000	'	'	'	'	'
Proceeds from Follow On Public Offering (in Dollars)	3,100,000	'	'	'	'	'
(in Dollars)	2,500,000	'	'	'	2,451,000	'
Stockholders' Equity Note, Stock Split, Conversion Ratio	'	14	'	'	'	'
Advertising Expense (in Dollars)	'	'	'	6,800,000	5,900,000	5,800,000
Research and Development Expense (in Dollars)	'	'	'	$11,863,000	$9,137,000	$5,222,000
Equipment [Member] | Minimum [Member]	'	'	'	'	'	'
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items]	'	'	'	'	'	'
Property, Plant and Equipment, Useful Life	'	'	'	'3 years	'	'
Equipment [Member] | Maximum [Member]	'	'	'	'	'	'
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items]	'	'	'	'	'	'
Property, Plant and Equipment, Useful Life	'	'	'	'7 years	'	'
Office Furniture andEquipmentMember | Minimum [Member]	'	'	'	'	'	'
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items]	'	'	'	'	'	'
Property, Plant and Equipment, Useful Life	'	'	'	'3 years	'	'
Office Furniture andEquipmentMember | Maximum [Member]	'	'	'	'	'	'
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items]	'	'	'	'	'	'
Property, Plant and Equipment, Useful Life	'	'	'	'7 years	'	'
Computer Equipment [Member] | Minimum [Member]	'	'	'	'	'	'
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items]	'	'	'	'	'	'
Property, Plant and Equipment, Useful Life	'	'	'	'3 years	'	'
Computer Equipment [Member] | Maximum [Member]	'	'	'	'	'	'
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items]	'	'	'	'	'	'
Property, Plant and Equipment, Useful Life	'	'	'	'5 years	'	'
Building [Member]	'	'	'	'	'	'
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items]	'	'	'	'	'	'
Property, Plant and Equipment, Useful Life	'	'	'	'39 years	'	'
Land, Buildings and Improvements [Member] | Minimum [Member]	'	'	'	'	'	'
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items]	'	'	'	'	'	'
Property, Plant and Equipment, Useful Life	'	'	'	'10 years	'	'
Land, Buildings and Improvements [Member] | Maximum [Member]	'	'	'	'	'	'
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items]	'	'	'	'	'	'
Property, Plant and Equipment, Useful Life	'	'	'	'39 years	'	'
Nonredeemable Convertible Preferred Stock [Member]	'	'	'	'	'	'
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items]	'	'	'	'	'	'
Conversion of Stock, Shares Issued (in Shares)	'	'	'	'	5,991,790	'
Redeemable Common Stock [Member]	'	'	'	'	'	'
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items]	'	'	'	'	'	'
Conversion of Stock, Shares Issued (in Shares)	'	'	'	'	3,189,648	'
Minimum [Member]	'	'	'	'	'	'
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items]	'	'	'	'	'	'
Property, Plant and Equipment, Useful Life	'	'	'	'3 years	'	'
Maximum [Member]	'	'	'	'	'	'
Note 2 - Summary of Significant Accounting Policies (Details) [Line Items]	'	'	'	'	'	'
Property, Plant and Equipment, Useful Life	'	'	'	'39 years	'	'

Note_3_Net_Income_Per_Common_S2

Note 3 - Net Income Per Common Share (Details)	12 Months Ended
	Dec. 31, 2013
Earnings Per Share [Abstract]	'
Preferred Stock, Dividend Rate, Percentage	8.00%

Note_3_Net_Income_Per_Common_S3

Note 3 - Net Income Per Common Share (Details) - Calculation of Net Income Per Basic and Diluted Share Attributable to Common Shareholders (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Calculation of Net Income Per Basic and Diluted Share Attributable to Common Shareholders [Abstract]	'	'	'
Net Income (in Dollars)	$35,277	$24,025	$17,972
Less: dividends on redeemable convertible preferred stock (in Dollars)	'	'	-4,179
Less: undistributed earnings allocated to preferred shareholders (in Dollars)	'	'	-4,507
Net income attributable to common shareholders (in Dollars)	$35,277	$24,025	$9,286
Basic - weighted-average shares outstanding:	25,198,556	23,373,593	12,352,004
Effect of dilutive securities:	'	'	'
Employee stock options, warrants and other	661,185	1,070,072	1,587,068
Diluted - weighted-average shares outstanding:	25,859,741	24,443,665	13,939,072
Net income per share attributable to common shareholders:	'	'	'
Basic (in Dollars per share)	$1.40	$1.03	$0.75
Diluted (in Dollars per share)	$1.36	$0.98	$0.67

Note_3_Net_Income_Per_Common_S4

Note 3 - Net Income Per Common Share (Details) - Calculation of Unaudited Pro Forma Net Income Per Basic and Diluted Share (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Calculation of Unaudited Pro Forma Net Income Per Basic and Diluted Share [Abstract]	'	'	'
Net income attributable to common shareholders, as reported (in Dollars)	$35,277	$24,025	$9,286
Dividends on redeemable convertible preferred stock (in Dollars)	'	'	4,179
Undistributed earnings allocated to preferred shareholders (in Dollars)	'	'	4,507
Pro forma net income (in Dollars)	$35,277	$24,025	$17,972
Basic - weighted-average shares outstanding, as reported	25,198,556	23,373,593	12,352,004
Add: common shares from conversion of redeemable convertible preferred shares	'	'	5,991,790
Pro forma basic weighted average shares outstanding	25,198,556	23,373,593	18,343,794
Effect of dilutive securities:	'	'	'
Employee stock options, warrants and other	661,185	1,070,072	1,587,068
Pro forma diluted - weighted-average shares outstanding:	25,859,741	24,443,665	19,930,862
Pro forma net income per share attributable to common shareholders:	'	'	'
Basic (in Dollars per share)	$1.40	$1.03	$0.98
Diluted (in Dollars per share)	$1.36	$0.98	$0.90

Note_4_Fair_Value_Measurements2

Note 4 - Fair Value Measurements (Details) - A Summary of Financial Assets Measured at Fair Value on A Recurring Basis (Fair Value, Measurements, Recurring [Member], Fair Value, Inputs, Level 1 [Member], USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]	'	'
Cash and cash equivalents	'	'
Money market mutual fund	$5,524	$16,164
Total	$5,524	$16,164

Note_5_Marketable_Securities_D

Note 5 - Marketable Securities (Details) - Information Regarding The Companybs Short-Term and Long-Term Marketable Securities (USD $)	Dec. 31, 2013	Dec. 31, 2011
In Thousands, unless otherwise specified
Schedule of Held-to-maturity Securities [Line Items]	'	'
Amortized Cost	$100,362	$62,102
Unrealized Gains	86	26
Unrealized Losses	-72	-31
Fair Value	100,376	62,097
US Government Agencies Debt Securities [Member]	'	'
Schedule of Held-to-maturity Securities [Line Items]	'	'
Amortized Cost	21,713	23,011
Unrealized Gains	2	2
Unrealized Losses	-22	-4
Fair Value	21,693	23,009
Corporate Debt Securities [Member]	'	'
Schedule of Held-to-maturity Securities [Line Items]	'	'
Amortized Cost	29,480	14,675
Unrealized Gains	30	18
Unrealized Losses	-20	-14
Fair Value	29,490	14,679
US States and Political Subdivisions Debt Securities [Member]	'	'
Schedule of Held-to-maturity Securities [Line Items]	'	'
Amortized Cost	44,474	17,971
Unrealized Gains	49	3
Unrealized Losses	-22	-12
Fair Value	44,501	17,962
Commercial Paper, Not Included with Cash and Cash Equivalents [Member]	'	'
Schedule of Held-to-maturity Securities [Line Items]	'	'
Amortized Cost	'	1,500
Fair Value	'	1,500
Bank Time Deposits [Member]	'	'
Schedule of Held-to-maturity Securities [Line Items]	'	'
Amortized Cost	4,695	4,945
Unrealized Gains	5	3
Unrealized Losses	-8	-1
Fair Value	$4,692	$4,947

Note_5_Marketable_Securities_D1

Note 5 - Marketable Securities (Details) - Balance of Held-To-Maturity Debt Securities by Contractual Maturity (USD $)	Dec. 31, 2013	Dec. 31, 2011
In Thousands, unless otherwise specified
Balance of Held-To-Maturity Debt Securities by Contractual Maturity [Abstract]	'	'
Due in one year or less	$36,339	'
Due after one year through five years	64,023	'
Total marketable securities	$100,362	$62,102

Note_6_Property_and_Equipment_1

Note 6 - Property and Equipment (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Abstract]	'	'	'
Depreciation, Depletion and Amortization	$7,569	$6,080	$4,264

Note_6_Property_and_Equipment_2

Note 6 - Property and Equipment (Details) - Property and Equipment (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Property and Equipment [Abstract]	'	'
Land	$2,830	$2,830
Buildings and improvements	13,655	13,114
Machinery and equipment	48,707	39,209
Computer hardware and software	5,957	5,019
Leasehold improvements	2,932	2,921
Construction in progress	9,196	1,903
Capital leases - machinery and equipment	1,240	1,512
	84,517	66,508
Accumulated depreciation and amortization	-28,416	-21,192
Property and equipment, net	$56,101	$45,316

Note_7_Inventory_Details_The_C

Note 7 - Inventory (Details) - The Companybs Inventory (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
The Companybs Inventory [Abstract]	'	'
Raw materials	$4,875	$4,174
Work in process	410	530
Total inventory	5,285	4,704
Allowance for obsolescence	-119	-85
Inventory, net of allowance	$5,166	$4,619

Note_8_Financing_Obligations_D

Note 8 - Financing Obligations (Details) (USD $)	12 Months Ended
	Dec. 31, 2013
Debt Disclosure [Abstract]	'
Line of Credit Facility, Expiration Date	30-Sep-13
Proceeds from Lines of Credit (in Dollars)	$0

Note_8_Financing_Obligations_D1

Note 8 - Financing Obligations (Details) - The Companybs Debt (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Note 8 - Financing Obligations (Details) - The Companybs Debt [Line Items]	'	'
Various obligations under capital leases, with interest rates from 4.5% to 7.4%, due in various monthly installments, including interest, through various dates through January 2016, secured by equipment	$363	$629
Less current portion	204	273
Long-term obligation	$159	$356

Note_8_Financing_Obligations_D2

Note 8 - Financing Obligations (Details) - The Companybs Debt (Parentheticals)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Minimum [Member]	'	'
Note 8 - Financing Obligations (Details) - The Companybs Debt (Parentheticals) [Line Items]	'	'
Interest Rates	4.50%	4.50%
Maximum [Member]	'	'
Note 8 - Financing Obligations (Details) - The Companybs Debt (Parentheticals) [Line Items]	'	'
Interest Rates	7.40%	7.40%

Note_8_Financing_Obligations_D3

Note 8 - Financing Obligations (Details) - Maturities on Long-Term Debt Obligations (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified
Maturities on Long-Term Debt Obligations [Abstract]	'
2014	$204
2015	148
2016	11
	$363

Note_9_Employee_Benefit_Plans_

Note 9 - Employee Benefit Plans (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Compensation and Retirement Disclosure [Abstract]	'	'	'
Minimum Number Of Employee Working Hours Required To Be Eligible To Participate In Four Zero One K Plan	20	'	'
Minimum Service Period Of Employees To Avail Benefit Under Defined Contribution Benefit Plan	'6 months	'	'
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	50.00%	'	'
Defined Contribution Plan Employer Match Contribution Amount	$0.60	$0.50	$0.40

Note_10_StockBased_Compensatio2

Note 10 - Stock-Based Compensation (Details) (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Note 10 - Stock-Based Compensation (Details) [Line Items]	'	'	'
Number of Equity Incentive Plans	2	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	'10 years	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date	15.00%	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period	'6 months	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent	85.00%	'	'
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price (in Dollars per share)	$7.79	$2.41	$0.29
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares)	1,382,891	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	'5 years	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	$33.20	$19.60	$2.50
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	'7 years	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value	59.6	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	'5 years 255 days	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	28.3	'	'
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options	6.5	'	'
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	'2 years 219 days	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value	$2.40	$1.30	$5.60
Employee Stock Option [Member]	'	'	'
Note 10 - Stock-Based Compensation (Details) [Line Items]	'	'	'
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures (in Shares)	30,690	86,419	'
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price (in Dollars per share)	$36.74	$13.60	'
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate	0.00%	0.00%	0.00%

Note_10_StockBased_Compensatio3

Note 10 - Stock-Based Compensation (Details) - Stock-Based Compensation Expense (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Note 10 - Stock-Based Compensation (Details) - Stock-Based Compensation Expense [Line Items]	'	'	'
Stock-Based Compensation Expense	$3,461	$3,039	$1,130
Income tax benefits	-847	-844	-338
Total stock-based compensation expense, net of tax	2,614	2,195	792
Employee Stock Option [Member]	'	'	'
Note 10 - Stock-Based Compensation (Details) - Stock-Based Compensation Expense [Line Items]	'	'	'
Stock-Based Compensation Expense	3,084	2,539	1,130
ESPP [Member]	'	'	'
Note 10 - Stock-Based Compensation (Details) - Stock-Based Compensation Expense [Line Items]	'	'	'
Stock-Based Compensation Expense	377	500	'
Cost of Sales [Member]	'	'	'
Note 10 - Stock-Based Compensation (Details) - Stock-Based Compensation Expense [Line Items]	'	'	'
Stock-Based Compensation Expense	316	335	78
Selling and Marketing Expense [Member]	'	'	'
Note 10 - Stock-Based Compensation (Details) - Stock-Based Compensation Expense [Line Items]	'	'	'
Stock-Based Compensation Expense	610	418	215
Research and Development Expense [Member]	'	'	'
Note 10 - Stock-Based Compensation (Details) - Stock-Based Compensation Expense [Line Items]	'	'	'
Stock-Based Compensation Expense	754	486	274
General and Administrative Expense [Member]	'	'	'
Note 10 - Stock-Based Compensation (Details) - Stock-Based Compensation Expense [Line Items]	'	'	'
Stock-Based Compensation Expense	$1,781	$1,800	$563

Note_10_StockBased_Compensatio4

Note 10 - Stock-Based Compensation (Details) - Assumptions Used In The Black-Scholes Option Pricing Model (Employee Stock Option [Member], USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Note 10 - Stock-Based Compensation (Details) - Assumptions Used In The Black-Scholes Option Pricing Model [Line Items]	'	'	'
Risk-free interest rate	'	'	3.68%
Expected life (years)	'	'	'5 years
Expected volatility	'	'	47.32%
Expected dividend yield	0.00%	0.00%	0.00%
Weighted average grant date fair value (in Dollars per share)	$25.86	$14.79	$8.99
Minimum [Member]	'	'	'
Note 10 - Stock-Based Compensation (Details) - Assumptions Used In The Black-Scholes Option Pricing Model [Line Items]	'	'	'
Risk-free interest rate	1.03%	0.95%	'
Expected life (years)	'5 years 6 months	'5 years 6 months	'
Expected volatility	49.36%	53.00%	'
Maximum [Member]	'	'	'
Note 10 - Stock-Based Compensation (Details) - Assumptions Used In The Black-Scholes Option Pricing Model [Line Items]	'	'	'
Risk-free interest rate	1.98%	1.16%	'
Expected life (years)	'6 years 6 months	'6 years 6 months	'
Expected volatility	53.54%	53.14%	'

Note_10_StockBased_Compensatio5

Note 10 - Stock-Based Compensation (Details) - Stock Option Activity (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Stock Option Activity [Abstract]	'	'	'
Options outstanding	1,691,357	2,099,300	2,039,338
Options outstanding (in Dollars per share)	$11.11	$6.18	$5.25
Exercisable at December 31, 2013	458,219	'	'
Exercisable at December 31, 2013 (in Dollars per share)	$9.46	'	'
Granted	187,615	259,800	224,000
Granted (in Dollars per share)	$49.69	$28.67	$20.07
Exercised	-695,777	-667,243	-164,038
Exercised (in Dollars per share)	$7.79	$2.41	$0.29
Cancelled	-39,945	-500	'
Cancelled (in Dollars per share)	$23.48	$30.58	'
Options outstanding	1,143,250	1,691,357	2,099,300
Options outstanding (in Dollars per share)	$19.03	$11.11	$6.18

Note_10_StockBased_Compensatio6

Note 10 - Stock-Based Compensation (Details) - Information about Stock Options Outstanding (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013
					Exercise Price Range One [Member]	Exercise Price Range Two [Member]	Exercise Price Range Three [Member]	Exercise Price Range Four [Member]	Exercise Price Range Five [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'	'	'	'	'	'
Range of Exercise Prices, Lower range	'	'	'	'	$0.57	'	'	$30.58	$47.08
Exercise Prices	'	'	'	'	'	$7.86	$20.07	'	'
Range of Exercise Prices, Upper range	'	'	'	'	$5.56	'	'	$36.41	$78.28
Number Outstanding (in Shares)	1,143,250	1,691,357	2,099,300	2,039,338	200,466	445,675	116,600	200,979	179,530
Weighted Average Remaining Contractual Life	'	'	'	'	'3 years 131 days	'6 years 354 days	'7 years 171 days	'8 years 149 days	'9 years 80 days
Weighted Average Exercise Price	$19.03	$11.11	$6.18	$5.25	$3.54	$7.86	$20.07	$31.16	$49.81
Number Exercisable (in Shares)	'	'	'	'	168,266	210,475	28,867	50,611	'
Weighted Average Exercise Price	'	'	'	'	$3.15	$7.86	$20.07	$31.04	'

Note_10_StockBased_Compensatio7

Note 10 - Stock-Based Compensation (Details) - Assumptions Used to Estimate The Fair Value of The ESPP (ESPP [Member])	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Note 10 - Stock-Based Compensation (Details) - Assumptions Used to Estimate The Fair Value of The ESPP [Line Items]	'	'
Expected life (months)	'6 years	'
Expected dividend yield	0.00%	0.00%
Minimum [Member]	'	'
Note 10 - Stock-Based Compensation (Details) - Assumptions Used to Estimate The Fair Value of The ESPP [Line Items]	'	'
Risk-free interest rate	0.11%	0.13%
Expected life (months)	'	'6 years
Expected volatility	39.80%	53.00%
Maximum [Member]	'	'
Note 10 - Stock-Based Compensation (Details) - Assumptions Used to Estimate The Fair Value of The ESPP [Line Items]	'	'
Risk-free interest rate	0.13%	0.16%
Expected life (months)	'	'8 years 6 months
Expected volatility	53.32%	53.14%

Note_11_Commitments_Details

Note 11 - Commitments (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Note 11 - Commitments (Details) [Line Items]	'	'	'
Lease Termination Notice Period	'6 months	'	'
Operating Leases, Rent Expense, Net (in Dollars)	$1.20	$1.30	$0.80
Land Lease Agreement One [Member]	'	'	'
Note 11 - Commitments (Details) [Line Items]	'	'	'
Lease Expiration Month And Year	'July 2017	'	'
Land Lease Agreement Two [Member]	'	'	'
Note 11 - Commitments (Details) [Line Items]	'	'	'
Lease Expiration Month And Year	'February 2016	'	'
Land Lease Agreement Three [Member]	'	'	'
Note 11 - Commitments (Details) [Line Items]	'	'	'
Lease Expiration Month And Year	'November 2021	'	'

Note_11_Commitments_Details_Fu

Note 11 - Commitments (Details) - Future Minimum Commitments under Non-Cancelable Leases (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified
Future Minimum Commitments under Non-Cancelable Leases [Abstract]	'
2014	$222
2014	1,242
2015	154
2015	1,206
2016	11
2016	664
2017	483
2018	378
After 2018	1,340
Total future minimum lease payments	387
Total future minimum lease payments	5,313
Less interest cost	24
Net present value of minimum lease payments	$363

Note_12_Accumulated_Other_Comp2

Note 12 - Accumulated Other Comprehensive Income (Details) - Other Comprehensive Income (Loss) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Foreign currency translation adjustment, net of tax	'	'	'
Balance at beginning of period	($928)	($738)	($458)
Other comprehensive income before reclassifications	-163	-190	-280
Net current-period other comprehensive income	-163	-190	-280
Balance at end of period	($1,091)	($928)	($738)

Note_13_Income_Taxes_Details

Note 13 - Income Taxes (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]	'	'	'
Income Tax Expense (Benefit)	$16,301,000	$10,944,000	$8,783,000
Effective Income Tax Rate Reconciliation, Percent	31.60%	31.30%	32.80%
Income Tax Credits and Adjustments	'	500,000	'
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	0.90%	'	'
Undistributed Earnings of Foreign Subsidiaries	11,800,000	6,400,000	3,600,000
Operating Loss Carryforwards	8,500,000	'	'
Deferred Tax Assets, Valuation Allowance	3,642,000	4,065,000	'
Unrecognized Tax Benefits	$695,000	$392,000	$392,000

Note_13_Income_Taxes_Details_C

Note 13 - Income Taxes (Details) - Components of Income (Loss) Before Income Taxes (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Components of Income (Loss) Before Income Taxes [Abstract]	'	'	'
Domestic	$45,659	$34,653	$26,699
Foreign	5,919	316	56
Total	$51,578	$34,969	$26,755

Note_13_Income_Taxes_Details_S

Note 13 - Income Taxes (Details) - Significant Components of Provision For Income Taxes (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current:	'	'	'
Federal	$13,934	$10,288	$5,561
State	379	217	291
Foreign	1,762	761	700
Deferred	'	'	'
Federal	168	-398	2,211
State	-39	65	9
Foreign	-335	-1,060	-1,018
Valuation Allowance	432	1,071	1,029
Total	$16,301	$10,944	$8,783

Note_13_Income_Taxes_Details_R

Note 13 - Income Taxes (Details) - Reconciliation of Federal Statutory Income Tax Rate to Effective Tax Rate	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reconciliation of Federal Statutory Income Tax Rate to Effective Tax Rate [Abstract]	'	'	'
Federal tax statutory rate	35.00%	35.00%	35.00%
State tax (net of federal benefit)	0.60%	0.80%	0.70%
Qualified subsidiary election	-0.80%	-3.50%	-3.80%
Valuation allowance against deferred tax assets	0.80%	3.50%	3.80%
Research and development credit	-1.80%	-0.40%	-0.30%
Foreign rate differential	-1.60%	-1.10%	-0.70%
Tax reserves	0.60%	0.00%	0.00%
Domestic manufacturing deduction	-1.10%	-2.90%	-1.70%
Provision to return	0.20%	-0.10%	-0.10%
Miscellaneous	-0.30%	0.00%	-0.10%
Total	31.60%	31.30%	32.80%

Note_13_Income_Taxes_Details_S1

Note 13 - Income Taxes (Details) - Significant Components of Deferred Tax Assets and Liabilities (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Deferred tax assets:	'	'
Accrued expenses	$243	$327
Warrants and stock options	1,434	1,034
Intangibles	112	117
Inventories	136	114
Other assets	217	211
Net operating loss	3,240	3,931
Less valuation allowance	-3,642	-4,065
Total deferred tax assets	1,740	1,669
Deferred tax liabilities:	'	'
Depreciation	-4,941	-4,406
Total deferred tax liabilities	-4,941	-4,406
Net deferred tax liability	($3,201)	($2,737)

Note_13_Income_Taxes_Details_R1

Note 13 - Income Taxes (Details) - Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits [Abstract]	'	'
Balance at beginning of period	$392	$392
Additions for tax positions of current year	64	0
Additions for tax positions of prior years	239	0
Balance at period end	$695	$392

Note_14_Warrants_Details

Note 14 - Warrants (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2010
Warrants Disclosure [Abstract]	'	'	'
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares)	'	'	105,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Share)	'	$105,000	$1.79
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item)	'	$105,000	$1.79
Warrants and Rights Outstanding	$0	$0	'

Note_15_Redeemable_Convertible1

Note 15 - Redeemable Convertible Preferred Stock and Redeemable Common Stock (Details)	Aug. 31, 2008	Dec. 31, 2008
	Redeemable Convertible Preferred Stock [Member]	Redeemable Common Stock [Member]
Note 15 - Redeemable Convertible Preferred Stock and Redeemable Common Stock (Details) [Line Items]	'	'
Temporary Equity, Shares Issued	427,985	'
Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Maximum Number of Shares	'	3,189,648

Note_17_Segment_and_Geographic2

Note 17 - Segment and Geographic Information (Details)	12 Months Ended
	Dec. 31, 2013
Segment Reporting [Abstract]	'
Number of Operating Segments	1
Number of Reportable Segments	1

Note_17_Segment_and_Geographic3

Note 17 - Segment and Geographic Information (Details) - Total Revenue by Product Line (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenue:	'	'	'
Revenue	$163,112	$125,991	$98,939
Protomold [Member]	'	'	'
Revenue:	'	'	'
Revenue	115,069	90,371	74,090
First Cut [Member]	'	'	'
Revenue:	'	'	'
Revenue	$48,043	$35,620	$24,849

Note_17_Segment_and_Geographic4

Note 17 - Segment and Geographic Information (Details) - Revenue to External Customers and Long-Lived Assets by Geography (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenue:	'	'	'
Revenue	$163,112	$125,991	$98,939
UNITED STATES	'	'	'
Revenue:	'	'	'
Revenue	119,870	94,866	73,010
International [Member]	'	'	'
Revenue:	'	'	'
Revenue	$43,242	$31,125	$25,929

Note_17_Segment_and_Geographic5

Note 17 - Segment and Geographic Information (Details) - Long-lived Assets by Geographic Region (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Long-lived assets:	'	'
Long-lived Assets	$56,101	$45,316
UNITED STATES	'	'
Long-lived assets:	'	'
Long-lived Assets	48,381	37,869
International [Member]	'	'
Long-lived assets:	'	'
Long-lived Assets	$7,720	$7,447