Detail of Certain Balance Sheet Accounts (Tables)

12 Months Ended

Dec. 31, 2016

Detail of Certain Balance Sheet Accounts

Schedule of activity in allowance for doubtful accounts

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

	December 31,
	2016		2015		2014
Balance at beginning of year	$	5,158	$	4,379	$	4,460
Bad debt expense (benefit)		(27)		1,552		1,275
Deductions for uncollectible receivables written off, net of recoveries		(876)		(798)		(1,650)
Allowance for doubtful accounts of acquired companies at date of acquisition		33		25		294
Balance at end of year	$	4,288	$	5,158	$	4,379

Schedule of other current liabilities

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

	December 31,
	2016		2015
Accrued warranty costs	$	6,702	$	7,746
Accrued job losses		1,269		1,365
Accrued sales and use tax		1,973		2,216
Deferred revenue		5,257		2,175
Liabilities due to former owners		4,196		2,650
Other current liabilities		14,864		12,525
	$	34,261	$	28,677