Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenues	$ 16,724	$ 11,532	$ 33,723	$ 25,316
Cost of revenues	12,547	8,101	25,609	17,878
Gross profit	4,177	3,431	8,114	7,438
Operating expenses:
Selling, general and administrative (including stock-based compensation expense of $129, $663, $195 and $983)	3,755	4,709	8,202	9,108
Research and development (including stock-based compensation expense of $18, $192, $35 and $192)	1,952	2,235	3,867	3,749
Severance expense	349		349
Total operating expenses	6,056	6,944	12,418	12,857
Loss from operations	(1,879)	(3,513)	(4,304)	(5,419)
Other (expense) income:
Interest income	2	2	5	8
Interest expense	(346)	(322)	(667)	(535)
Other income (expense), net	125	553	(192)	720
Total other (expense) income	(219)	233	(854)	193
Loss from continuing operations before income taxes	(2,098)	(3,280)	(5,158)	(5,226)
Income tax expense (benefit) from continuing operations	117	249	(205)	471
Net loss from continuing operations	(2,215)	(3,529)	(4,953)	(5,697)
Net loss from operations of discontinued Energy Systems division	(49)	(43)	(132)	(46)
Net loss	(2,264)	(3,572)	(5,085)	(5,743)
Basic and diluted net loss per share:
Net loss from continuing operations per share (in Dollars per share)	$ (0.31)	$ (0.88)	$ (0.69)	$ (1.43)
Net loss from discontinued operations per share (in Dollars per share)		$ (0.01)	$ (0.01)	$ (0.01)
Net loss per share (in Dollars per share)	$ (0.31)	$ (0.89)	$ (0.70)	$ (1.44)
Weighted-average number of common shares outstanding - basic and diluted (in Shares)	7,221	4,009	7,220	3,997
Comprehensive Loss:
Net loss	(2,264)	(3,572)	(5,085)	(5,743)
Foreign currency translation adjustments	(579)	(89)	(77)	462
Comprehensive loss	$ (2,843)	$ (3,661)	$ (5,162)	$ (5,281)