Note 11 - Business Segment Information (Details) - Reportable Segment Data Reconciled to the Consolidated Financial Statements (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Segment Reporting Information [Line Items]
Sales	$ 3,152,000	$ 454,000	$ 5,006,000	$ 711,000
Loss (Income) From Operations	3,107,000	5,009,000	6,636,000	9,943,000
Depreciation and Amortization	325,000	250,000	619,000	519,000
Assets	60,065,000	54,635,000	60,065,000	54,635,000	66,389,000
Power And Energy Group [Member]
Segment Reporting Information [Line Items]
Sales	3,092,000	394,000	4,886,000	591,000
Loss (Income) From Operations	3,148,000	5,047,000	6,718,000	10,022,000
Depreciation and Amortization	306,000	230,000	581,000	481,000
Assets	59,829,000	54,263,000	59,829,000	54,263,000
Other Segments [Member]
Segment Reporting Information [Line Items]
Sales	60,000	60,000	120,000	120,000
Loss (Income) From Operations	(41,000)	(38,000)	(82,000)	(79,000)
Depreciation and Amortization	19,000	20,000	38,000	38,000
Assets	$ 236,000	$ 372,000	$ 236,000	$ 372,000