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Detail of Certain Balance Sheet Accounts
 12 Months Ended
Dec. 31, 2017
Detail of Certain Balance Sheet Accounts  
Detail of Certain Balance Sheet Accounts

7. Detail of Certain Balance Sheet Accounts

Activity in our allowance for doubtful accounts consists of the following (in thousands):

 

 

 

 

 

 

 

 

 

 

 

 

 

December 31,

 

 

    

2017

    

2016

    

2015

 

Balance at beginning of year

 

$
4,288

 

$

5,158

 

$

4,379

 

Bad debt expense (benefit)

 

 

182

 

 

(27)

 

 

1,552

 

Deductions for uncollectible receivables written off, net of recoveries

 

 

(1,829)

 

 

(876)

 

 

(798)

 

Allowance for doubtful accounts of acquired companies at date of acquisition

 

 

759

 

 

33

 

 

25

 

Balance at end of year

 

$

3,400

 

$
4,288

 

$

5,158

 

 

Other current liabilities consist of the following (in thousands):

 

 

 

 

 

 

 

 

 

 

December 31,

 

 

    

2017

    

2016

 

Accrued warranty costs

 

$

6,149

 

$

6,702

 

Accrued job losses

 

 

598

 

 

1,269

 

Accrued sales and use tax

 

 

2,308

 

 

1,973

 

Deferred revenue

 

 

3,895

 

 

5,257

 

Liabilities due to former owners

 

 

2,981

 

 

4,196

 

Other current liabilities

 

 

17,723

 

 

14,864

 

 

 

$

33,654

 

$

34,261