Restructuring (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011
Restructuring [Abstract]
Restructuring accrual of severance and related benefits			$ 1,300,000
Activity in restructuring accrual [Roll Forward]
Balance at December 31, 2011	130,000	731,000
Additions, net	62,000	125,000
Payments	(170,000)	(726,000)
Balance at March 31, 2012	22,000	130,000	731,000
Severance and Related Benefits [Member]
Activity in restructuring accrual [Roll Forward]
Balance at December 31, 2011	115,000	571,000
Additions, net	0	0
Payments	(93,000)	(456,000)
Balance at March 31, 2012	22,000	115,000
Other Exit Costs [Member]
Activity in restructuring accrual [Roll Forward]
Balance at December 31, 2011	5,000	6,000
Additions, net	62,000	122,000
Payments	(67,000)	(123,000)
Balance at March 31, 2012	0	5,000
Contract Termination Costs [Member]
Activity in restructuring accrual [Roll Forward]
Balance at December 31, 2011	10,000	154,000
Additions, net	0	3,000
Payments	(10,000)	(147,000)
Balance at March 31, 2012	$ 0	$ 10,000