Retentions Receivable and Long-term Retentions Receivable (Tables)

3 Months Ended

Mar. 31, 2013

Other Assets [Abstract]

Components of Retentions Receivable from Long Term Contracts

The following table shows the components of retentions receivable from long-term contracts as of March 31, 2013 and December 31, 2012:

	March 31, 2013				December 31, 2012
	Retentions receivable		Long-term   retentions   receivable		Retentions receivable		Long-term   retentions   receivable
Chinese government or province owned customers:
Amounts billed and due	$	288,021	$	510,766	$	585,832	$	342,871
Amounts billed and not due		7,045,360		349,423		7,218,256		1,098,770
		7,333,381		860,189		7,804,088		1,441,641
Commercial customers:
Amount billed and due		2,291,323		244,218		512,115		319,021
Amount billed and not due		4,324,984		364,034		4,921,270		734,956
		6,616,307		608,252		5,433,385		1,053,977
Total	$	13,949,688	$	1,468,441	$	13,237,473	$	2,495,618