Accounts Receivable

12 Months Ended

Dec. 31, 2016

Receivables [Abstract]

Accounts Receivable

4. ACCOUNTS RECEIVABLE

Accounts receivable as of December 31, 2016 and December 31, 2015 consist of the following (in thousands):

	December 31, 2016			December 31, 2015
Billed receivables	$	1,547		$	1,326
Less allowance for doubtful accounts		(76	)		(194	)
Accounts receivable - net	$	1,471		$	1,132

The following table summarizes the allowance for doubtful accounts activity as of and for the years ended December 31, 2016, December 31, 2015 and December 31, 2014 (in thousands).

	Balance at Beginning of Period			Additions Charged to Expense			Charged to Other Accounts			Write-offs		Balance at End of Period
Allowance for doubtful accounts:
Year Ended December 31, 2016	$	(194	)	$	(52	)	$	-		$	170	$	(76	)
Year Ended December 31, 2015	$	(158	)	$	(36	)	$	(12	)	$	12	$	(194	)
Year Ended December 31, 2014	$	(102	)	$	(92	)	$	(21	)	$	57	$	(158	)