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Note 7 - Loan Payable (Details Textual)		3 Months Ended
	Jan. 20, 2017 USD ($)	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($)	[1]	Oct. 01, 2018	Sep. 30, 2018	Jan. 24, 2018 USD ($)	Jan. 19, 2017 USD ($)
Payments of Financing Costs, Total	$ 600,000	$ 4,125	$ 591,175
Foreign Exchange Risk [Member]
Line of Credit Facility, Maximum Borrowing Capacity		$ 3,500,000
Line of Credit Facility Covenant Period		1 year 180 days
Derivative Asset, Fair Value, Gross Asset, Total		$ 12,800,000
Second Interim Amendment [Member]
Credit Agreement, Maximum Aggregate Amount Held in Account With Certain Bank							$ 3,000,000
Bank of Montreal and Royal Bank of Canada [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 140,000,000
Debt Instrument, Term	4 years
Maximum Total Funded Debt to EBITDA Ratio	2.25
Repayment Obligation, Percentage of Excess Cash Flow	50.00%
Minimum Fixed Charge Coverage Ratio		1.2
Maximum Annual Capital Expenditures Requirement		$ 50,000,000
Line of Credit Facility, Maximum Funded Share Repurchases Ceiling		$ 20,000,000
Maximum Ratio of Funded Share Repurchases to 12 Months Trailing EDITDA		1.5
Bank of Montreal and Royal Bank of Canada [Member] | Scenario, Forecast [Member]
Maximum Total Funded Debt to EBITDA Ratio					2.25	2.5
Bank of Montreal and Royal Bank of Canada [Member] | Total Loans Do Not Exceed 1.5 Times of Trailing 12 Months EBITDA [Member]
Line of Credit Facility, Maximum Funded Share Repurchases Ceiling		$ 40,000,000
Bank of Montreal and Royal Bank of Canada [Member] | Non-revolving Facility C [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 35,500,000							$ 40,000,000
Bank of Montreal and Royal Bank of Canada [Member] | Non-revolving Facility D [Member]
Line of Credit Facility, Maximum Borrowing Capacity	84,500,000
Long-term Line of Credit, Total	84,500,000
Bank of Montreal and Royal Bank of Canada [Member] | Revolving Credit Facility A [Member]
Line of Credit Facility, Maximum Borrowing Capacity	5,000,000
Bank of Montreal and Royal Bank of Canada [Member] | Revolving Reducing Term Facility B [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 15,000,000
Bank of Montreal and Royal Bank of Canada [Member] | Credit Facility B and C [Member] | Draws for Share Repurchases [Member]
Debt Instrument, Term	4 years
Bank of Montreal and Royal Bank of Canada [Member] | Credit Facility B and C [Member] | Draws for Acquisitions [Member]
Debt Instrument, Term	5 years
Bank of Montreal and Royal Bank of Canada [Member] | Credit Facility B and C [Member] | Draws for FFTH Capital Expenditures [Member]
Debt Instrument, Term	7 years
Bank of Nova [member] | Corporate Credit Card Program [Member]
Line of Credit Facility, Maximum Borrowing Capacity		$ 5,000,000
[1] The Company has initially applied ASC 2014-09 (Topic 606) using the modified retrospective method. Under this method, the comparative information is not restated.

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The maximum aggregate amount can be held in an account with certain bank pursuant to a credit agreement.

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The amount that the loan facility may not exceed a specified funded share repurchases.

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The maximum annual capital expenditures required by the credit facility.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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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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