Note 9 - Debt (Detail) - Outstanding Letters of Credit (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Letters of Credit Amount Outstanding	$ 450	$ 500
Letter of Credit Expiration Date: 4/01/2013 [Member] | Original L/C Issue Date: 3/29/2010 [Member] | Lease Expiration Date: 4/30/2021 [Member] | Mt. Laurel [Member]
Letters of Credit Amount Outstanding	250	250
Letter of Credit Expiration Date: 11/08/2013 [Member] | Original L/C Issue Date: 10/27/2010 [Member] | Lease Expiration Date: 8/23/2021 [Member] | Mansfield [Member]
Letters of Credit Amount Outstanding	200	200
Letter of Credit Expiration Date: 6/30/2012 [Member] | Original L/C Issue Date: 9/13/2004 [Member] | Lease Expiration Date: 4/30/2012 [Member] | San Jose [Member]
Letters of Credit Amount Outstanding		$ 50