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Revenue: Revenue (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Fastener | Automotive
Revenue	$ 5,845,574	$ 5,696,401	$ 11,913,584	$ 11,934,425
Fastener | NonAutomotive
Revenue	3,188,701	2,400,943	6,045,790	4,899,107
Fastener
Revenue	9,034,275	8,097,344	17,959,374	16,833,532
Assembly Equipment | Automotive
Revenue	38,842	34,690	88,905	81,592
Assembly Equipment | NonAutomotive
Revenue	719,667	1,303,474	1,756,146	2,003,711
Assembly Equipment
Revenue	758,509	1,338,164	1,845,051	2,085,303
Automotive
Revenue	5,884,416	5,731,091	12,002,489	12,016,017
NonAutomotive
Revenue	3,908,368	3,704,417	7,801,936	6,902,818
Revenue	$ 9,792,784	$ 9,435,508	$ 19,804,425	$ 18,918,835

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

+ Details

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