Consolidated Statements of Comprehensive Loss (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Revenues	$ 55,284	$ 60,537
Cost of revenues	39,880	45,816
Gross profit	15,404	14,721
Operating expenses:
Selling, general and administrative (including stock-based compensation expense of $665 and $456)	13,728	14,946
Research and development (including stock-based compensation expense of $6 and $76)	4,703	6,723
Severance and other charges	1,239	889
Total operating expenses	19,670	22,558
Loss from operations	(4,266)	(7,837)
Other income (expense):
Interest income	6	11
Interest expense	(1,406)	(1,479)
Other expense, net	(762)	(756)
Total other expense	(2,162)	(2,224)
Loss from continuing operations before income taxes	(6,428)	(10,061)
Income tax expense (benefit) from continuing operations	352	(367)
Net loss from continuing operations	(6,780)	(9,694)
Discontinued operations:
(Loss) income from operations of discontinued Energy Systems Division	(317)	57
Income tax expense from discontinued operations	1	23
Net (loss)income from discontinued operations	(318)	34
Net loss	(7,098)	(9,660)
Foreign currency translation adjustments	(924)	604
Comprehensive loss	$ (8,022)	$ (9,056)
Basic and diluted net loss per share:
Net loss from continuing operations per share (in Dollars per share)	$ (0.82)	$ (1.34)
Net loss from discontinued operations per share (in Dollars per share)	$ (0.04)
Net loss per share (in Dollars per share)	$ (0.86)	$ (1.34)
Weighted-average number of common shares outstanding – basic and diluted (in Shares)	8,285	7,227