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Note 17 - Segment Reporting - Revenue by Product Line (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenue	$ 344,490	$ 298,055	$ 264,106
Injection Molding (Protomold) [Member]
Revenue	194,432	175,974	163,387
CNC Machining (Firstcut) [Member]
Revenue	103,739	81,407	74,368
3D Printing (Fineline) [Member]
Revenue	43,329	37,847	25,132
Sheet Metal [Member]
Revenue	1,767
Other Products [Member]
Revenue	$ 1,223	$ 2,827	$ 1,219

X

- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

+ Details

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- Details

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- Details

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X

- Details

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- Details

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