Accounts Receivable, Net

6 Months Ended

Jun. 30, 2012

Accounts Receivable, Net [Abstract]

Accounts Receivable, Net [Text Block]

3.    Accounts Receivable, Net

 

Accounts receivable, net consists of the following:

	June 30,			December 31,
	2012			2011
Trade receivables	$	38,997		$	35,482
Unbilled revenue		8,491			6,347
Other receivables		1,714			1,250
		49,202			43,079
Less: Allowance for doubtful accounts		(198	)		(359	)
Accounts receivable, net	$	49,004		$	42,720

Under contract accounting, unbilled revenue on long-term contracts arise when the sales or revenues based on performance  attainment, though appropriately recognized, cannot be billed yet under terms of the contract as of the balance sheet date.  Accounts receivable expected to be collected after one year are not material.