Concentration of Credit Risk (Tables)

12 Months Ended

Dec. 31, 2015

Concentration of Credit Risk [Abstract]

Changes in the allowance for doubtful accounts

An analysis of the changes in the allowance for doubtful accounts is presented as follows (in thousands):

	2015			2014			2013
Balance, beginning of year	$	179		$	252		$	206
Provisions for bad debts		116			50			147
Less:  Write-offs and recoveries		(89	)		(123	)		(101	)
Balance, end of year	$	206		$	179		$	252

Schedule of customers providing more than 10 percent of revenues

Management believes that a loss of any of those customers where the Company currently derives more than 10 percent of its revenues would not have a material adverse effect on the Company’s operations as shown below:

Individual customer sales									Individual customer receivables in excess
in excess of 10% of revenues									of 10% of total receivables as of December 31,
2015			2014			2013			2015			2014			2013
	24.4	%		20.3	%		18.5	%		20.3	%		16.6	%		16.0	%
	13.8	%		14.0	%		17.7	%		16.5	%		16.6	%		15.8	%
	-			-			15.8	%		12.7	%		10.4	%		12.7	%
	-			-			10.4	%		-			-			-