COMMITMENTS AND CONTINGENCIES (Tables)

6 Months Ended

Jun. 30, 2018

COMMITMENTS AND CONTINGENCIES

Schedule of changes in the carrying amount of the total product warranty liability

	For the Six Months Ended June 30,
	2018		2017
Balance, beginning of period	$	581	$	671
Addition to (reduction of) warranty reserve		15		(89)
Warranty claims		(3)		10
Balance, end of period	$	593	$	592

Schedule of the activity in the accounts receivable allowance liability

	For the Six Months Ended June 30,
	2018		2017
Balance at beginning of period	$	225	$	145
(Recoveries) bad debt expense		(12)		48
Write-offs		(13)		—
Balance at end of period	$	200	$	193