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Note 7 - Financing Arrangements (Details Textual)			1 Months Ended	12 Months Ended
	Nov. 30, 2017 USD ($)	Oct. 31, 2017 USD ($)	Mar. 31, 2012 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Long-term Debt				$ 13,653,008
Payments to Acquire Businesses, Gross				419,813	$ 500,000
Business Combination, Contingent Consideration, Liability, Current				100,000
Asset Purchase Agreement [Member]
Business Combination, Contingent Consideration, Liability, Current		$ 100,000
MesoScribe Technologies, Inc [Member]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High				300,000
MesoScribe Technologies, Inc [Member] | Asset Purchase Agreement [Member]
Business Combination, Consideration Transferred		800,000
Payments to Acquire Businesses, Gross		500,000
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High		$ 300,000
Creative Bath Products, Inc [Member]
Purchase Commitment, Amount	$ 13,850,000
Loan [Member]
Debt Instrument, Periodic Payment				$ 62,777.60
Debt Instrument, Interest Rate, Stated Percentage				3.9148%
Debt Instrument, Face Amount				$ 10,387,500
HSBC Bank Mortgage Loan [Member] | HSBC Bank [Member]
Debt Instrument, Number of Payments			120
Debt Instrument, Periodic Payment			$ 25,000
Long-term Debt				$ 3,000,000	$ 3,300,000
Debt Instrument, Interest Rate, Stated Percentage				3.3118%	2.561%
HSBC Bank Mortgage Loan [Member] | HSBC Bank [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate				1.75%
HSBC Bank [Member] | Loan [Member]
Debt Instrument, Number of Payments	60
Debt Instrument, Periodic Payment	$ 62,777.60
Debt Instrument, Interest Rate, Stated Percentage	3.9148%
Debt Instrument, Face Amount	$ 10,387,500
HSBC Bank [Member] | Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity				$ 7,000,000

X

- Definition

The number of payments for a debt instrument.

+ References

No definition available.

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X

- Definition

The amount related to a purchase commitment.

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- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 7
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X

- Definition

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+ References

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- Definition

Amount of liability recognized arising from contingent consideration in a business combination, expected to be settled within one year or the normal operating cycle, if longer.

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X

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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- Definition

Face (par) amount of debt instrument at time of issuance.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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X

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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