Note 1 - Description of Business and Summary of Accounting Policies (Details Textual)	3 Months Ended					12 Months Ended			21 Months Ended	36 Months Ended
	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Jun. 30, 2014 USD ($)	Mar. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Mar. 31, 2015 USD ($)	Mar. 31, 2014 USD ($) $ / item	Mar. 31, 2013 USD ($)	Dec. 31, 2014 USD ($)	Mar. 31, 2014 USD ($)
Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Number of Major Customers						1	0	0
Concentration Risk, Percentage						13.00%	10.00%	10.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member]
Number of Major Customers						2
Error in Revenue Recognition Method [Member] | Sales [Member]
Prior Period Reclassification Adjustment							$ (225,000)	$ (45,000)	$ (170,000)	$ (296,000)
Number of Microalgal Species Cultivated | $ / item							2
Number of Product Lines							2
Number of Operating Segments							1
Cash FDIC Insured Amount Limit Per Bank	$ 250,000					$ 250,000
Cash Uninsured Amount One	2,212,000					2,212,000
Number of Days Past Due of Significant Individual Balances for Monthly Review of Allowance for Doubtful Accounts							90 days
Inventory Valuation Reserves	4,000			$ 6,000		4,000	$ 6,000			6,000
Inventory Abnormal Production Costs	607,000	$ 196,000	$ 17,000	353,000	$ 44,000	639,000	306,000	1,157,000
Non Inventoriable Fixed Costs						182,000	91,000	94,000
Interest Costs Capitalized						228,000	199,000	54,000
Asset Retirement Obligation	0			0		0	0			0
Advertising Expense						1,082,000	1,126,000	$ 575,000
Unrecognized Tax Benefits	0			$ 0		0	$ 0			$ 0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	$ 0					$ 0