Note 8 - Debt (Detail) - Outstanding Letters of Credit (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011
Letters of Credit Amount Outstanding	$ 450	$ 500
Mt. Laurel [Member]
Original L/C Issue Date	Dec. 31, 2010
L/C Expiration Date	4/01/2013
Lease Expiration Date	Dec. 31, 2021
Letters of Credit Amount Outstanding	250	250
Mansfield [Member]
Original L/C Issue Date	Dec. 31, 2010
L/C Expiration Date	11/07/2012
Lease Expiration Date	Dec. 31, 2021
Letters of Credit Amount Outstanding	200	200
San Jose [Member]
Original L/C Issue Date	Dec. 31, 2004
L/C Expiration Date	6/30/2012
Lease Expiration Date	Dec. 31, 2012
Letters of Credit Amount Outstanding		$ 50