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5) Stock-based Compensation: Schedule of stock inventive plan changes (Details) - USD ($)	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017	Dec. 31, 2016
Class A Common Stock
Shares, Outstanding	842,738	741,973	880,426	741,973
Shares outstanding	$ 4.48	$ 4.33	$ 4.35	$ 4.33
Shares Exercised	(31,984)
Shares Cancelled	(5,704)
Options Exercisable	777,373	671,816
Options exercisable	$ 4.42	$ 4.08
Available options for future grant	$ 421,241	$ 525,682
Weighted average contractual term of options outstanding	6.30 years	6.87 years
Weighted average contractual term of options exercisable	6.29 years	6.61 years
Aggregated intrinsic value of options outstanding	$ 873,372	$ 1,564,592
Aggregated intrinsic value of options exercisable	$ 862,976	$ 1,564,592
Class C Common Stock
Shares, Outstanding	523,603	428,669	523,603	556,298
Shares outstanding	$ 5.24	$ 5.59	$ 5.24	$ 4.61
Shares Exercised		(103,402)
Shares Cancelled		(24,227)
Options Exercisable	486,853	386,669
Options exercisable	$ 5.27	$ 5.40
Available options for future grant	$ 165,638	$ 227,750
Weighted average contractual term of options outstanding	2.94 years	2.88 years
Weighted average contractual term of options exercisable	2.45 years	2.71 years
Aggregated intrinsic value of options outstanding	$ 267,943	$ 449,896
Aggregated intrinsic value of options exercisable	$ 253,243	$ 449,896

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Represents the description of Weighted average contractual term of options outstanding, during the indicated time period.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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Number of shares issued which are neither cancelled nor held in the treasury.

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