Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended																12 Months Ended
	Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2013	Dec. 31, 2012
Consolidated Statements Of Operations [Abstract]
Revenues	$ 8,552		$ 8,726		$ 9,317		$ 6,713		$ 5,803		$ 11,558		$ 13,003		$ 11,280		$ 33,308	$ 41,644
Cost of revenues																	18,658	23,465
Gross margin	3,631		4,006		4,074		2,939		2,334		5,081		5,529		5,235		14,650	18,179
Research and development expenses																	7,519	7,748
Selling, general and administrative expenses																	12,345	12,802
Restructuring and severance costs																	952	740
Loss from operations	(2,010)	[1]	(961)	[1]	(1,171)	[1]	(2,024)	[1]	(2,712)	[2]	(589)	[2]	98	[2]	92	[2]	(6,166)	(3,111)
Interest income and other																	(188)	(24)
Loss before income taxes																	(6,354)	(3,135)
Income tax provision (benefit)																	(186)	3,576
Net loss	$ (2,048)		$ (774)		$ (1,200)		$ (2,146)		$ (6,499)	[3]	$ (447)	[3]	$ 143	[3]	$ 92	[3]	$ (6,168)	$ (6,711)
Net loss per share - Basic	$ (0.31)	[4]	$ (0.11)	[4]	$ (0.17)	[4]	$ (0.31)	[4]	$ (0.93)	[4]	$ (0.06)	[4]	$ 0.02	[4]	$ 0.01	[4]	$ (0.91)	$ (0.97)
Net loss per share - Diluted	$ (0.31)	[4]	$ (0.11)	[4]	$ (0.17)	[4]	$ (0.31)	[4]	$ (0.93)	[4]	$ (0.06)	[4]	$ 0.02	[4]	$ 0.01	[4]	$ (0.91)	$ (0.97)
Weighted average shares outstanding - Basic																	6,798	6,946
Weighted average shares outstanding - Diluted																	6,798	6,946

[1] Includes a restructuring and severance charge of $952,000 in the fourth quarter of 2013.

[2] Includes restructuring charges of $217,000 in the third quarter and $523,000 in the fourth quarter of 2012.

[3] Includes a $5.7 million non-cash charge in the fourth quarter of 2012 to record a valuation allowance against our deferred tax assets

[4] The summation of quarterly per share amounts may not equal the calculation for the full year, as each quarterly calculation is performed discretely.