Note 8 - Restructuring and Severance Costs (Detail) - Restructuring Costs Reconciliation (USD $)	12 Months Ended		24 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011	Aug. 03, 2010
Balance, Restructuring liability	$ 51,000
Accrual for Contract Terminations	280,000		280,000
Severance assumed in OCS acquisition				6,570,000
Accrual for severance and employee related costs		157,000
Payments	(331,000)	(439,000)	(347,000)
Balance, Restructuring liability		51,000
2010 Restructuring Plan One Time Termination Benefits [Member]
Balance, Restructuring liability	37,000
Accrual for severance and employee related costs		143,000
Payments	(37,000)	(106,000)
Balance, Restructuring liability		37,000
2010 Restructuring Plan Contract Terminations [Member]
Accrual for Contract Terminations	280,000		280,000
Payments	(280,000)
OCS One-time Termination Benefits [Member] | Severance Assumed [Member]
Severance assumed in OCS acquisition		333,000
OCS One-time Termination Benefits [Member]
Balance, Restructuring liability	14,000
Accrual for severance and employee related costs		14,000
Payments	(14,000)	(333,000)
Balance, Restructuring liability		14,000
Severance Assumed [Member]
Severance assumed in OCS acquisition		333,000
Accrual for severance and employee related costs		$ 14,000