Note 14 - Selected Quarterly Financial Data (Unaudited) (Details Textual) - USD ($)	3 Months Ended					12 Months Ended			21 Months Ended	36 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2014	Mar. 31, 2014
Error in Revenue Recognition Method [Member] | Sales [Member]
Prior Period Reclassification Adjustment							$ (225,000)	$ (45,000)	$ (170,000)	$ (296,000)
Inventory Abnormal Production Costs	$ 607,000	$ 196,000	$ 17,000	$ 353,000	$ 44,000	$ 639,000	$ 306,000	$ 1,157,000