Note 6 - Borrowings (Details Textual) $ in Thousands | Jan. 28, 2015USD ($) | Oct. 21, 2014USD ($) | Nov. 30, 2015USD ($) | Sep. 30, 2016USD ($) | Jun. 30, 2016USD ($) | Mar. 31, 2015USD ($) |
Term Loan [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] | | | | | | |
Debt Instrument, Basis Spread on Variable Rate | 1.75% | | | | | |
Term Loan [Member] | London Interbank Offered Rate (LIBOR) [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 | 1.00% | | | | | |
Term Loan [Member] | Federal Funds Effective Swap Rate [Member] | | | | | | |
Debt Instrument, Basis Spread on Variable Rate | 0.50% | | | | | |
Term Loan [Member] | Additional Margin on Variable Rate Option [Member] | Minimum [Member] | | | | | | |
Debt Instrument, Basis Spread on Variable Rate | 0.75% | | | | | |
Term Loan [Member] | Additional Margin on Variable Rate Option [Member] | Maximum [Member] | | | | | | |
Debt Instrument, Basis Spread on Variable Rate | 1.25% | | | | | |
Term Loan [Member] | | | | | | |
Long-term Debt | $ 35,000 | | $ 17,300 | $ 15,583 | $ 16,167 | |
Debt Instrument, Interest Rate, Effective Percentage | | | | 2.3125% | | |
Debt Instrument, Amortization Period | 15 years | | | | | |
Debt Instrument, Covenant, Minimum Fixed Charge Coverage Ratio | 1.1 | | | | | |
Debt Covenant, Fixed Charge Coverage Ratio, Maximum Outstanding Term Loans | $ 17,500 | | | | | |
Debt Instrument, Covenant, Minimum Fixed Charge Coverage Ratio for Covenant to Cease to Apply | 1.25 | | | | | |
Debt Instrument, Covenant, Minimum Percentage of Total Revolving Credit to Avoid Triggering Fixed Charge Coverage Ratio Covenant | 15.00% | | | | | |
Repayments of Debt | | | $ 16,500 | | | |
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] | | | | | | |
Debt Instrument, Basis Spread on Variable Rate | 1.50% | | | | | |
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] | | | | | | |
Debt Instrument, Basis Spread on Variable Rate | 1.75% | | | | | |
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | | | | | | |
Debt Instrument, Basis Spread on Variable Rate | 1.00% | | | | | |
Revolving Credit Facility [Member] | Federal Funds Effective Swap Rate [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] | | | | | | |
Long-term Debt | | | | $ 25,000 | 25,000 | |
Line of Credit Facility, Maximum Borrowing Capacity | $ 115,000 | | | | | |
Debt Instrument, Interest Rate, Effective Percentage | | | | 2.0625% | | |
Debt Instrument, Covenant, Percentage of Total Revolving Credit | 20.00% | | | | | |
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% | | | | | |
Debt Instrument, Term | | 5 years | | | | |
Debt Agreement, Maximum Borrowing Capacity | | $ 150,000 | | | | |
Long-term Debt | | | | $ 41,088 | 41,838 | |
Debt Issuance Costs, Net | | | | | | $ 1,500 |
Line of Credit Facility, Average Availability | | | | 65.00% | | |
Letters of Credit Outstanding, Amount | | | | $ 100 | 200 | |
Line of Credit Facility, Remaining Borrowing Capacity | | | | $ 89,900 | $ 89,800 | |