Quarterly report pursuant to Section 13 or 15(d)

DEBT (Details)

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DEBT (Details)
3 Months Ended
Jun. 30, 2015
USD ($)
Apr. 24, 2014
USD ($)
Wells Fargo Credit Agreement    
Debt Instrument [Line Items]    
Fixed charge coverage ratio   1.5
Amount of liquidity to be below for covenant to be applicable   $ 25,000,000
Line of credit facility, maximum borrowing amount   $ 75,000,000
Line of credit facility, expiration date Mar. 29, 2017  
Line of credit facility, frequency of commitment fee payment Quarterly  
Line of credit facility, percent commitment fee on undrawn amounts 0.375%  
Line of credit facility, average liquidity when covenant is applied   15,000,000.0
Line of credit facility, fixed charge coverage ratio   1.2
Line of credit facility, fixed charge coverage ratio, period when covenant is applied 12 months  
Amount of borrowings, if exceeded, increase the filing of compliance certificates to monthly rather than quarterly   $ 5,000,000.0
Line of credit facility, amount of liquidity required to avoid audits   20,000,000.0
Wells Fargo Credit Agreement | Letter of Credit    
Debt Instrument [Line Items]    
Line of credit facility, letters of credit outstanding $ 1,000,000  
3.50% convertible subordinated notes    
Debt Instrument [Line Items]    
Principal amount outstanding   $ 83,700,000
Stated interest rate 3.50% 3.50%
Debt due date Nov. 15, 2015