Note 6 - Debt (Details) - Outstanding Letters of Credit - Letter of Credit [Member] - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Note 6 - Debt (Details) - Outstanding Letters of Credit [Line Items]
Letters of Credit Amount Outstanding	$ 350	$ 350
Mt. Laurel [Member]
Note 6 - Debt (Details) - Outstanding Letters of Credit [Line Items]
Original L/C Issue Date	Mar. 29, 2010
L/C Expiration Date	Apr. 01, 2016
Lease Expiration Date	Apr. 30, 2021
Letters of Credit Amount Outstanding	$ 250	250
Mansfield [Member]
Note 6 - 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	$ 100