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Note 8 - Notes Payable and Capital Leases - Long-term Debt (Details) (Parentheticals) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Loan With Officer [Member]
Stated Rate		6.25%
Mortgages [Member]
Effective Rate		4.50%
Periodic payment		$ 7,778
Prime rate		3.75%
Variable rate		0.75%
Amortization period (Year)		25 years
9% Subordinated Notes [Member]
Stated Rate		9.00%
Maturty date description		Due on demand
8% Subordinated Notes [Member]
Stated Rate		8.00%
Maturty date description		Due on demand
Prime + 2% Subordinated Notes [Member]
Effective Rate		5.75%
Prime rate		3.75%
Variable rate		2.00%
Maturty date description		Due on demand
4% Subordinated Notes [Member]
Stated Rate	4.00%
Prime + .25% Note Payable [Member] | CTI Europe [Member]
Effective Rate	3.50%	3.50%
Prime rate	3.25%	3.25%
Variable rate	0.25%	0.25%
Maturty date description	Due 2015	Due 2015
Promissory Note With Merrick [Member]
Stated Rate	4.25%	4.25%
Promissory Note with Schwan Leasing [Member]
Stated Rate	4.25%	4.25%
Maturty date description	Due on demand	Due on demand
Note Payable at 11.75% [Member] | Flexo Universal [Member]
Stated Rate	11.75%	11.75%
Maturty date description	Due 2021	Due 2021
BMO Equity [Member] | Mezzanine Note Payable [Member]
Stated Rate		11.50%
Effective Rate		15.56%
Maturity Date		Jan. 18, 2018
BMO Harris Bank N.A. [Member] | Term Loan [Member]
Effective Rate		4.50%
Maturity Date		Mar. 31, 2017
Periodic payment		$ 22,323
Prime rate		3.75%
Variable rate		0.75%
Amortization period (Year)		5 years
First American Equipment Finance [Member]
Periodic payment	$ 2,890	$ 2,890
Amortization period (Year)	5 years	5 years
Wells Fargo [Member] | 5 Year Capital Lease [Member]
Periodic payment	$ 367	$ 367
Amortization period (Year)	5 years	5 years
Wells Fargo [Member] | 3 Year Capital Lease [Member]
Periodic payment		$ 550
Amortization period (Year)		3 years
PNC [Member] | Term Loan [Member]
Stated Rate	8.25%
Periodic payment	$ 100,000
Amortization period (Year)	5 years

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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