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Revenue: Revenue (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Fastener | Automotive
Revenue	$ 5,291,033	$ 5,181,974	$ 17,225,475	$ 17,116,399
Fastener | NonAutomotive
Revenue	2,645,765	2,304,219	8,670,697	7,203,326
Fastener
Revenue	7,936,798	7,486,193	25,896,172	24,319,725
Assembly Equipment | Automotive
Revenue	100,751	49,040	189,656	130,631
Assembly Equipment | NonAutomotive
Revenue	818,500	851,523	2,574,646	2,855,235
Assembly Equipment
Revenue	919,251	900,563	2,764,302	2,985,866
Automotive
Revenue	5,391,784	5,231,014	17,415,131	17,247,030
NonAutomotive
Revenue	3,464,265	3,155,742	11,245,343	10,058,561
Revenue	$ 8,856,049	$ 8,386,756	$ 28,660,474	$ 27,305,591

X

- Definition

Amount, excluding 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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045

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