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Note 6 - Long-term Debt (Details Textual)		1 Months Ended	3 Months Ended
	Jul. 02, 2015 USD ($)	Feb. 29, 2012 USD ($)	Jun. 30, 2016 USD ($)	Apr. 30, 2014 USD ($)
Line of Credit [Member] | Infitrak Acquisition [Member]
Proceeds from Lines of Credit	$ 1,000,000
Line of Credit [Member] | Minimum [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate	1.50%
Line of Credit [Member] | Maximum [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate	2.25%
Line of Credit [Member] | Debt Instrument, Variable Rate Base CBFR Using One Month LIBOR [Member]
Debt Instrument, Basis Spread on Variable Rate Used to Calculate Commercial Bank Floating Rate	0.50%
Line of Credit [Member] | Through March 31, 2016 [Member]
Debt Instrument Covenant, Ratio of Funded Debt to Consolidated EBITDA	3.25
Line of Credit [Member] | After March 31, 2016 [Member]
Debt Instrument Covenant, Ratio of Funded Debt to Consolidated EBITDA	3
Line of Credit [Member]
Debt Instrument, Term		3 years
Line of Credit Facility, Maximum Borrowing Capacity	$ 50,000,000
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.25%
Debt Instrument Covenant, Fixed Charge Coverage Ratio	1.35
Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity		$ 20,000,000
Letter of Credit [Member]
Line of Credit Facility, Maximum Borrowing Capacity		$ 1,000,000
Initial Term Loan [Member]
Long-term Debt, Gross				$ 15,000,000
Term Loan [Member] | Infitrak Acquisition [Member]
Proceeds from Issuance of Long-term Debt	$ 8,000,000
Term Loan [Member] | Maximum [Member]
Debt Instrument, Basis Spread on Variable Rate	2.25%
Term Loan [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate	1.50%
Term Loan [Member] | Subsequent Event [Member]
Repayments of Long-term Debt			$ 750,000
Term Loan [Member]
Long-term Debt, Gross	$ 20,000,000
Repayments of Long-term Debt	$ 12,000,000
Line of Credit Facility, Periodic Payment, Number of Quarterly Payments	20
Line of Credit Facility, Periodic Payment, Principal	$ 750,000

X

- Definition

The percentage points added to the reference rate used to calculate commercial bank floating rate (CBFR).

+ References

No definition available.

+ Details

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X

- Definition

Represents the fixed charge coverage ratio required to be maintained by the entity under the terms of debt arrangement.

+ References

No definition available.

+ Details

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X

- Definition

Represents the ratio of funded debt to EBITDA, required to be maintained under the terms of debt arrangements.

+ References

No definition available.

+ Details

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X

- Definition

The number of quarterly periodic payments on a line of credit facility.

+ References

No definition available.

+ Details

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X

- Definition

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

+ References

No definition available.

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X

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 942
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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X

- Definition

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.

+ References

No definition available.

+ Details

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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X

- Definition

Amount of the required periodic payment applied to principal.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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X

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

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X

- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6513228

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X

- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

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- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

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