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Note 4 - Long-Term Debt - Long-term Debt (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Mar. 31, 2015
Line of Credit [Member]    
Long-term debt $ 28,500 $ 13,500
Term Loan [Member]    
Long-term debt 18,500 12,750
Long-term debt 47,000  
Less: current portion (3,000) (3,000)
Long-term portion $ 44,000 $ 23,250