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Prepaid Expenses and Other Current Assets, Accrued Expenses, Other Current Liabilities, and Other Liabilities
12 Months Ended
Dec. 31, 2018
Payables and Accruals [Abstract]  
Prepaid Expenses and Other Current Assets, Accrued Expenses, Other Current Liabilities, and Other Liabilities
Prepaid Expenses and Other Current Assets, Accrued Expenses, Other Current Liabilities, and Other Liabilities
The following table presents the components of selected balance sheet items as of December 31, 2018 and 2017 (in thousands):
 
 
December 31,
Prepaid expenses and other current assets:
 
2018
 
2017
Deferred costs in transit
 
$
83,652

 
$
54,483

Supplier receivable
 
31,842

 
29,941

Supplier credits receivable
 
17,667

 
12,936

Other prepaid and other current assets
 
62,269

 
33,478

Total prepaid expenses and other current assets
 
$
195,430

 
$
130,838


 
 
December 31,
Accrued expenses:
 
2018
 
2017
Employee compensation and related benefits
 
$
91,914

 
$
55,142

Advertising
 
67,259

 
38,888

Accrued property, plant and equipment
 
13,955

 
8,592

Credit card
 
16,740

 
4,573

Audit, legal and professional fees
 
1,703

 
1,749

Other accrued expenses
 
21,426

 
11,303

Total accrued expenses
 
$
212,997

 
$
120,247


 
 
December 31,
Other current liabilities:
 
2018
 
2017
Sales tax payable
 
$
49,989

 
$
35,726

Sales return reserve
 
35,707

 
21,243

Other current liabilities
 
42,299

 
28,057

Total current other liabilities
 
$
127,995

 
$
85,026

 
 
December 31,
Other liabilities:
 
2018
 
2017
Deferred rent
 
$
99,746

 
$
59,811

Construction costs under build-to-suit leases
 
60,089

 
37,545

Other liabilities
 
553

 
9,136

Total other liabilities
 
$
160,388

 
$
106,492