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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 |  |  |

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- 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 -Topic 944 -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 -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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