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Note 11 - Segment Reporting - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue	$ 107,504	$ 117,455	$ 329,187	$ 346,839
Injection Molding (Protomold) [Member]
Revenue	53,257	55,167	165,927	165,935
CNC Machining (Firstcut) [Member]
Revenue	33,115	40,219	99,760	116,979
3D Printing (Fineline) [Member]
Revenue	16,294	15,898	46,478	45,644
Sheet Metal [Member]
Revenue	3,988	5,280	14,306	15,777
Other Products [Member]
Revenue	$ 850	$ 891	$ 2,716	$ 2,504

X

- Definition

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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