Consolidated Statements of Operations and Comprehensive Loss (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Revenues	$ 60,537	$ 61,607
Cost of revenues	45,816	44,023
Gross profit	14,721	17,584
Selling, general and administrative (including stock-based compensation expense of $456 and $1,280)	14,946	16,699
Research and development (including stock-based compensation expense of $76 and $215)	6,723	7,408
Severance and other charges	889
Total operating expenses	22,558	24,107
Loss from operations	(7,837)	(6,523)
Other income (expense):
Interest income	11	17
Interest expense	(1,479)	(1,228)
Other (expense) income, net	(756)	805
Total other expense	(2,224)	(406)
Loss from continuing operations before income taxes	(10,061)	(6,929)
Income tax (benefit) expense from continuing operations	(367)	291
Net loss from continuing operations	(9,694)	(7,220)
Discontinued operations:
Income (loss) from operations of discontinued Energy Systems Division	57	(89)
Income tax expense from discontinued operations	23	2
Net income (loss) from discontinued operations	34	(91)
Net loss	(9,660)	(7,311)
Foreign currency translation adjustments	604	(477)
Comprehensive loss	$ (9,056)	$ (7,788)
Basic and diluted net loss per share:
Net loss from continuing operations per share (in Dollars per share)	$ (1.34)	$ (1.30)
Net loss from discontinued operations per share (in Dollars per share)		$ (0.01)
Net loss per share (in Dollars per share)	$ (1.34)	$ (1.31)
Weighted-average number of common shares outstanding – basic and diluted (in Shares)	7,227	5,574