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2. BALANCE SHEET COMPONENTS
The components of certain balance sheet amounts are as follows (in thousands):
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December 31,
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2012
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2013
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Property and equipment:
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Office equipment
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$
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544
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$
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354
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Office software
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523
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533
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Furniture and fixtures
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49
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62
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Leasehold improvements
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294
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256
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Construction in progress
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–
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102
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Property and equipment, at cost
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1,410
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1,307
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Accumulated depreciation and amortization
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(1,289
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)
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(1,042
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)
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$
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121
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$
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265
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Other accrued expenses:
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Sales returns
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$
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181
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$
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504
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Employee-related expense
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1,034
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1,860
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Warehousing and inventory-related expense
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301
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595
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Other
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172
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187
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$
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1,688
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$
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3,146
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Deferred revenue:
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Unshipped product
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$
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384
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$
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1,938
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Auto ship advances
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263
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449
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Enrollment package revenue
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189
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182
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$
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836
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$
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2,569
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Other current liabilities:
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Unclaimed checks
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$
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761
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$
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674
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Other
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230
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208
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$
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991
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$
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882
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