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Note 4 - Long-Term Debt (Details) (USD $)
 1 Months Ended 6 Months Ended 6 Months Ended 1 Months Ended 6 Months Ended 6 Months Ended
Sep. 30, 2014
Oct. 30, 2014
Subsequent Event [Member]
Sep. 30, 2014
Line of Credit [Member]
London Interbank Offered Rate (LIBOR) [Member]
Minimum [Member]
Sep. 30, 2014
Line of Credit [Member]
London Interbank Offered Rate (LIBOR) [Member]
Maximum [Member]
Sep. 30, 2014
Line of Credit [Member]
Debt Instrument Variable Rate Base CBFR Using One Month LIBOR [Member]
Minimum [Member]
Sep. 30, 2014
Line of Credit [Member]
Debt Instrument Variable Rate Base CBFR Using One Month LIBOR [Member]
Maximum [Member]
Sep. 30, 2014
Line of Credit [Member]
Debt Instrument Variable Rate Base CBFR Using One Month LIBOR [Member]
Sep. 30, 2014
Line of Credit [Member]
Minimum [Member]
Sep. 30, 2014
Line of Credit [Member]
Maximum [Member]
Feb. 29, 2012
Line of Credit [Member]
Sep. 30, 2014
Line of Credit [Member]
Sep. 30, 2014
Revolving Credit Facility [Member]
Sep. 30, 2014
Letter of Credit [Member]
Sep. 30, 2014
Term Loan [Member]
London Interbank Offered Rate (LIBOR) [Member]
Sep. 30, 2014
Term Loan [Member]
Apr. 30, 2014
Term Loan [Member]
Note 4 - Long-Term Debt (Details) [Line Items]                                
Debt Instrument, Term                   3 years            
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars)                       $ 20,000,000 $ 1,000,000      
Long-term Debt, Gross (in Dollars)                               15,000,000
Debt Instrument, Basis Spread on Variable Rate     1.25% 2.00% 0.50% 1.25%               2.00%    
Debt Instrument Basis Spread on Variable Rate Used to Calculate Commercial Bank Floating Rate             2.50%                  
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage               0.15% 0.30%              
Line of Credit Facility Unused Capacity Fee Ratio of Funded Debt to EBITDA Low End of Range                 1              
Line of Credit Facility, Unused Capacity Fee Ratio of Funded Debt to EBITDA High End of Range               2                
Line of Credit Facility, Periodic Payment, Number of Quarterly Payments 11                              
Line of Credit Facility, Periodic Payment, Principal (in Dollars)                             750,000  
Debt Instrument Covenant Ratio of Funded Debt to Consolidated EBIDTA                     2.5          
Debt Instrument Covenant Fixed Charge Coverage Ratio               1.35                
Proceeds from Lines of Credit (in Dollars)   5,000,000                            
Repayments of Long-term Debt (in Dollars)   750,000                            
Repayments of Lines of Credit (in Dollars)   $ 1,500,000