Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenues	$ 14,400	$ 14,974	$ 48,123	$ 40,290
Cost of revenues	10,526	10,704	36,135	28,582
Gross profit	3,874	4,270	11,988	11,708
Operating expenses:
Selling, general and administrative (including stock-based compensation expense of $113, $170, $308 and $1,153)	3,380	3,896	11,582	13,004
Research and development (including stock-based compensation expense of $21, $12, $56 and $204)	1,646	1,624	5,513	5,373
Severance expense	4		353
Total operating expenses	5,030	5,520	17,448	18,377
Loss from operations	(1,156)	(1,250)	(5,460)	(6,669)
Other (expense) income:
Interest income	4	4	9	12
Interest expense	(442)	(333)	(1,109)	(868)
Other (expense) income, net	(500)	244	(692)	964
Total other (expense) income	(938)	(85)	(1,792)	108
Loss from continuing operations before income taxes	(2,094)	(1,335)	(7,252)	(6,561)
Income tax (benefit) expense from continuing operations	(123)	541	(328)	1,012
Net loss from continuing operations	(1,971)	(1,876)	(6,924)	(7,573)
Net income (loss) from operations of discontinued Energy Systems division	201	(141)	69	(187)
Net loss	(1,770)	(2,017)	(6,855)	(7,760)
Basic and diluted net loss per share:
Net loss from continuing operations per share (in Dollars per share)	$ (0.27)	$ (0.27)	$ (0.96)	$ (1.51)
Net income (loss) from discontinued operations per share (in Dollars per share)	$ 0.03	$ (0.02)	$ 0.01	$ (0.04)
Net loss per share (in Dollars per share)	$ (0.24)	$ (0.29)	$ (0.95)	$ (1.55)
Weighted-average number of common shares outstanding - basic and diluted (in Shares)	7,229	7,035	7,223	5,021
Comprehensive Loss:
Net loss	(1,770)	(2,017)	(6,855)	(7,760)
Foreign currency translation adjustments	834	(1,140)	757	(679)
Comprehensive loss	$ (936)	$ (3,157)	$ (6,098)	$ (8,439)