Note 3 - Liquidity and Earnings (Loss) Per Share (Details Textual)	3 Months Ended
	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Revolving Credit Facility [Member] | Wells Fargo [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 12,000,000
Line of Credit Facility, Remaining Borrowing Capacity	0
Line of Credit, Current	11,800,000
Proceeds from Line of Credit Used to Secure Bond	$ 200,000
Number of Lines of Credit	2
Cash and Cash Equivalents, at Carrying Value	$ 1,050,000	$ 2,629,000	$ 322,000	$ 1,020,000
Working Capital	(14,600,000)	(13,200,000)
Line of Credit, Current	$ 11,800,000	$ 11,100,000