Property and Equipment (Details) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Property and Equipment
Computers and software	$ 618,000	$ 618,000
Machinery and equipment	947,000	892,000
Furniture and office equipment	98,000	98,000
Demonstration vehicles and buses	675,000	774,000
Leasehold improvements	1,348,000	1,348,000
Construction in process		39,000
Plant And Property Gross	386,000	3,769,000
Less accumulated depreciation and amortization	(3,048,000)	(2,841,000)
Total	$ 638,000	$ 928,000