Quarterly report pursuant to Section 13 or 15(d)

LONG-TERM DEBT (Details)

v2.4.0.8
LONG-TERM DEBT (Details) (USD $)
0 Months Ended
Apr. 24, 2014
Sep. 30, 2014
Apr. 24, 2014
Sep. 30, 2013
Debt Instrument [Line Items]        
Amount of borrowings, if exceeded, increase the filing of compliance certificates to monthly rather than quarterly $ 5,000,000.0   $ 5,000,000.0  
3.50% convertible subordinated notes
       
Debt Instrument [Line Items]        
Principal amount outstanding     133,700,000  
Interest per annum on the principal amount   3.50% 3.50% 3.50%
Debt due date Nov. 15, 2015      
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 due date Mar. 29, 2017      
Line of credit facility, frequency of commitment fee payment Quarterly      
Line of credit facility, percent commitment fee 0.375%      
Line Of Credit Facility Average Liquidity When Covenant Is Applied     15,000,000.0  
Fixed charge coverage ratio, ratio when covenant is applicable     1.2  
Amount of borrowings, if exceeded, increase the filing of compliance certificates to monthly rather than quarterly     5,000,000.0  
Amount of liquidity required to avoid mandatory field audits     20,000,000.0  
Wells Fargo credit agreement | Letter of credit
       
Debt Instrument [Line Items]        
Total letters of credit outstanding   $ 1,000,000