Quarterly Financial Information (Details) (USD $)	3 Months Ended																12 Months Ended
	Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2011		Sep. 30, 2011		Jun. 30, 2011		Mar. 31, 2011		Dec. 31, 2012	Dec. 31, 2011
Quarterly Financial Information [Abstract]
Revenues	$ 5,803,000		$ 11,558,000		$ 13,003,000		$ 11,280,000		$ 13,790,000		$ 17,088,000		$ 16,859,000		$ 13,350,000		$ 41,644,000	$ 61,087,000
Gross margin	2,334,000		5,081,000		5,529,000		5,235,000		6,472,000		7,467,000		7,507,000		6,607,000		18,179,000	28,053,000
Income (loss) from operations	(2,712,000)	[1]	(589,000)	[1]	98,000	[1]	92,000	[1]	688,000		2,069,000		1,844,000		1,087,000		(3,111,000)	5,688,000
Net income (loss)	(6,499,000)	[2]	(447,000)	[2]	143,000	[2]	92,000	[2]	547,000		1,566,000		1,398,000		846,000		(6,711,000)	4,357,000
Net income (loss) per share - Basic	$ (0.93)	[3]	$ (0.06)	[3]	$ 0.02	[3]	$ 0.01	[3]	$ 0.08	[3]	$ 0.23	[3]	$ 0.20	[3]	$ 0.12	[3]	$ (0.97)	$ 0.63
Net income (loss) per share - Diluted	$ (0.93)	[3]	$ (0.06)	[3]	$ 0.02	[3]	$ 0.01	[3]	$ 0.08	[3]	$ 0.22	[3]	$ 0.20	[3]	$ 0.12	[3]	$ (0.97)	$ 0.63
Restructuring and severance costs	523,000		217,000														740,000
Non-cash charge to record a valuation allowance against our deferred tax assets																	$ 5,700,000

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

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

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