Accounts Receivable

12 Months Ended

Dec. 31, 2014

Receivables [Abstract]

Accounts Receivable

3. Accounts Receivable

(Table only in thousands)	2014			2013
Trade receivables	$	15,875		$	18,815
Contract receivables		43,218			26,249
Allowance for doubtful accounts		(699	)		(700	)
	$	58,394		$	44,364

Balances billed, but not paid by customers under retainage provisions in contracts, amounted to approximately $0.5 million and $1.1 million at December 31, 2014 and 2013, respectively. Retainage receivables on contracts in progress are generally collected within a year after contract completion.

Provision for doubtful accounts was approximately $0.3 million, $0.1 million and $0.2 million during 2014, 2013 and 2012, respectively, while accounts charged to (recovered from) the allowance were $0.3 million, $(35,000) and $0.2 million during 2014, 2013 and 2012, respectively.