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ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
3 Months Ended
Mar. 31, 2015
ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]  
Loyalty deferred revenue
Deferred commissions were $4.5 million at March 31, 2015 and December 31, 2014.

Loyalty program
 
(in thousands)
 
Loyalty deferred revenue as of January 1, 2014
 
$
5,456
 
Loyalty points forfeited
  
(4,664
)
Loyalty points used
  
(12,348
)
Loyalty points vested
  
19,580
 
Loyalty points unvested
  
1,679
 
Loyalty deferred revenue as of December 31, 2014
 
$
9,703
 
 
Loyalty deferred revenue as of January 1, 2015
 
$
9,703
 
Loyalty points forfeited
  
(1,381
)
Loyalty points used
  
(3,592
)
Loyalty points vested
  
3,144
 
Loyalty points unvested
  
1,846
 
Loyalty deferred revenue as of March 31, 2015
 
$
9,720
 
Sales return reserve
For the three months ended March 31, 2015, sales return reserve consisted of the following (in thousands):

   
Sales reserve as of January 1, 2015
 
$
207
 
Provision related to sales made in current period
  
510
 
Adjustment related to sales made in prior periods
  
(43
)
Actual returns or credits related to current period
  
(276
)
Actual returns or credits related to prior periods
  
(158
)
Sales reserve as of March 31, 2015
 
$
240