Segment Reporting (Details Textual) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012 Segment	Jun. 30, 2011
Segment Reporting (Textual) [Abstract]
Foreign country customers revenue	10.00%	10.00%
Segment Reporting (Additional Textual) [Abstract]
Number of reportable segments	4
Enviroplex [Member]
Segment Reporting (Textual) [Abstract]
Sales revenues	4,723	1,952
Mobile Modular [Member]
Segment Reporting (Textual) [Abstract]
Sales revenues	0	0
Foreign Country Customers [Member]
Segment Reporting (Textual) [Abstract]
Foreign country customers revenue	11.00%	11.00%