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Note 6 - Borrowings (Details Textual) - USD ($) |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Jan. 28, 2015 | Oct. 21, 2014 | Sep. 27, 2005 | Nov. 30, 2015 | Mar. 31, 2015 | Mar. 31, 2016 | Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2014 | Dec. 31, 2015
Senior Notes [Member] |  |  |  |  |  |  |  |  |  |
Senior Notes |  |  | $ 200,000,000 |  |  |  |  |  |  |
Debt Instrument, Term |  |  | 10 years |  |  |  |  |  |  |
Term Loan [Member] |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 35,000,000 |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Long-term Debt |  |  |  |  | $ 35,000,000 |  |  |  |  |
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Average Availability Option [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 1.50% |  |  |  |  |  |  |  |  |
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Average Availability Option [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 1.75% |  |  |  |  |  |  |  |  |
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Average Availability Option B [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 1.00% |  |  |  |  |  |  |  |  |
Revolving Credit Facility [Member] | Federal Funds Effective Swap Rate [Member] | Average Availability Option B [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 0.50% |  |  |  |  |  |  |  |  |
Revolving Credit Facility [Member] | Additional Margin on Variable Rate Option [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 0.50% |  |  |  |  |  |  |  |  |
Revolving Credit Facility [Member] | Additional Margin on Variable Rate Option [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 0.75% |  |  |  |  |  |  |  |  |
Revolving Credit Facility [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage | 0.15% |  |  |  |  |  |  |  |  |
Revolving Credit Facility [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage | 0.25% |  |  |  |  |  |  |  |  |
Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 115,000,000 |  |  |  |  |  |  |  |  |
Proceeds from Issuance of Long-term Debt |  |  |  |  | 40,000,000 |  |  |  |  |
Line of Credit Facility, Interest Rate at Period End |  |  |  |  |  |  | 2.00% |  |  |
Debt Instrument, Covenant, Percentage of Total Revolving Credit | 20.00% |  |  |  |  |  |  |  |  |
Long-term Debt |  |  |  |  |  |  | $ 25,000,000 | $ 40,000,000 |  |
Repayments of Long-term Debt |  |  |  |  |  |  | $ 15,000,000 |  |  |
Letter of Credit [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Interest Rate During Period | 1.50% |  |  |  |  |  |  |  |  |
Letter of Credit [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Interest Rate During Period | 1.75% |  |  |  |  |  |  |  |  |
London Interbank Offered Rate (LIBOR) [Member] | Average Availability Option B [Member] | Term Loan [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 1.00% |  |  |  |  |  |  |  |  |
London Interbank Offered Rate (LIBOR) [Member] | Rent Adjusted Leverage Ratio Option [Member] | Minimum [Member] | Term Loan [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 1.75% |  |  |  |  |  |  |  |  |
London Interbank Offered Rate (LIBOR) [Member] | Rent Adjusted Leverage Ratio Option [Member] | Maximum [Member] | Term Loan [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 2.25% |  |  |  |  |  |  |  |  |
Federal Funds Effective Swap Rate [Member] | Rent Adjusted Leverage Ratio Option [Member] | Term Loan [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 0.50% |  |  |  |  |  |  |  |  |
Additional Margin on Variable Rate Option [Member] | Minimum [Member] | Term Loan [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 0.75% |  |  |  |  |  |  |  |  |
Additional Margin on Variable Rate Option [Member] | Maximum [Member] | Term Loan [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate | 1.25% |  |  |  |  |  |  |  |  |
Minimum Fixed Charge Coverage Ratio Thereafter [Member] | Term Loan [Member] |  |  |  |  |  |  |  |  |  |
Fixed Charge Coverage Ratio | 1.1 |  |  |  |  |  |  |  |  |
Minimum Fixed Charge Coverage Ratio for Covenant to Cease to Apply [Member] | Term Loan [Member] |  |  |  |  |  |  |  |  |  |
Fixed Charge Coverage Ratio | 1.25 |  |  |  |  |  |  |  |  |
Minimum Availability Needed to Avoid Re-Triggering Fixed Charge Coverage Ratio Covenant [Member] | Term Loan [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Covenant, Percentage of Total Revolving Credit | 15.00% |  |  |  |  |  |  |  |  |
Term Loan [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Effective Percentage |  |  |  |  |  |  | 2.25% |  |  |
Debt Instrument, Amortization Period | 15 years |  |  |  |  |  |  |  |  |
Debt Covenant, Fixed Charge Coverage Ratio, Maximum Outstanding Term Loans | $ 17,500,000 |  |  |  |  |  |  |  |  |
Repayments of Debt |  |  |  | $ 16,500,000 |  |  |  |  |  |
Long-term Debt |  |  |  | $ 17,300,000 |  |  |  |  |  |
Debt Instrument, Term |  | 5 years |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | $ 150,000,000 |  |  |  |  |  |  |  |
Debt Issuance Costs, Net |  |  |  |  | $ 1,500,000 |  |  |  |  |
Long-term Debt |  |  |  |  |  |  | $ 41,838,000 | 76,237,000 |  |
Line of Credit Facility, Average Availability |  |  |  |  |  | 65.00% |  |  |  |
Letters of Credit Outstanding, Amount |  |  |  |  |  |  | 0.20 |  |  | $ 200,000
Line of Credit Facility, Remaining Borrowing Capacity |  |  |  |  |  |  | 89,800,000 | 74,800,000 |  |
Repayments of Long-term Debt |  |  |  |  |  |  | $ 34,840,000 | $ 133,710,000 | $ 480,000 |

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