Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Condensed Consolidated Statements of Operations [Abstract]
Revenues	$ 11,532	$ 12,926	$ 25,316	$ 25,371
Cost of revenues	8,101	9,756	17,878	18,595
Gross margin	3,431	3,170	7,438	6,776
Operating expenses:
Selling, general and administrative (including stock-based compensation expense of $663, $45, $983 and $91)	4,861	2,650	9,412	5,687
Research and development (including stock-based compensation expense of $192, $0, $192 and $0)	2,235	1,157	3,749	2,145
Recapitalization expense		560		727
Severance expense		15		15
Gain on sale of intellectual property				(3,900)
Total operating expenses	7,096	4,382	13,161	4,674
(Loss) income from operations	(3,665)	(1,212)	(5,723)	2,102
Other income (expense):
Interest income	2		8	2
Interest expense	(322)	(532)	(535)	(678)
Other income (expense), net	553	188	720	(109)
Total other income (expense)	233	(344)	193	(785)
(Loss) income from continuing operations before income taxes	(3,432)	(1,556)	(5,530)	1,317
Income tax expense from continuing operations	249	304	471	510
Net (loss) income from continuing operations	(3,681)	(1,860)	(6,001)	807
Net loss from operations of discontinued Energy Systems division	(43)	(87)	(46)	(162)
Net (loss) income	$ (3,724)	$ (1,947)	$ (6,047)	$ 645
Basic net (loss) income per share:
Net (loss) income from continuing operations per share	$ (0.92)	$ (3.38)	$ (1.50)	$ 1.47
Net loss from discontinued operations per share	$ (0.01)	$ (0.16)	$ (0.01)	$ (0.30)
Net (loss) income per share	$ (0.93)	$ (3.54)	$ (1.51)	$ 1.17
Diluted net (loss) income per share:
Net (loss) income from continuing operations per share	$ (0.92)	$ (3.38)	$ (1.50)	$ 1.46
Net loss from discontinued operations per share	$ (0.01)	$ (0.16)	$ (0.01)	$ (0.30)
Net (loss) income per share	$ (0.93)	$ (3.54)	$ (1.51)	$ 1.16
Weighted-average number of common shares outstanding:
Basic	4,009	550	3,997	550
Diluted	4,009	550	3,997	554