Accounts Receivable (Tables)

12 Months Ended

Dec. 31, 2013

Receivables [Abstract]

Summary of Accounts Receivable

	2013			2012
Trade receivables	$	18,815		$	3,893
Contract receivables		26,249			26,171
Allowance for doubtful accounts		(700	)		(565	)
	$	44,364		$	29,499