Note 7 - Debt (Details) - Outstanding Letters of Credit (Letter of Credit [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Note 7 - Debt (Details) - Outstanding Letters of Credit [Line Items]
Letters of Credit Amount Outstanding	$ 350	$ 450
Mt. Laurel [Member]
Note 7 - Debt (Details) - Outstanding Letters of Credit [Line Items]
Original L/C Issue Date	Mar. 29, 2010
L/C Expiration Date	Mar. 31, 2015
Lease Expiration Date	Apr. 30, 2021
Letters of Credit Amount Outstanding	250	250
Mansfield [Member]
Note 7 - Debt (Details) - Outstanding Letters of Credit [Line Items]
Original L/C Issue Date	Oct. 27, 2010
L/C Expiration Date	Nov. 08, 2015
Lease Expiration Date	Aug. 23, 2021
Letters of Credit Amount Outstanding	$ 100	$ 200