Note 9 - Commitments and Contingencies (Details) (USD $)	1 Months Ended		3 Months Ended		3 Months Ended		1 Months Ended
	Jun. 30, 2013	Mar. 31, 2013	Mar. 31, 2014 ft	Dec. 31, 2013	Mar. 31, 2014 Massachusetts [Member]	Mar. 31, 2014 Washington [Member]	Apr. 30, 2013 Default on Obligation, Februray 2012 [Member]
Note 9 - Commitments and Contingencies (Details) [Line Items]
Installation of a reactive iron wall covering area			250
Environmental Remediation Estimated Initial Construction Cost			$ 688,000
Environmental Remediation Expense Expected To Be Incurred			1,997,000
Estimated period			30 years
Loss Contingency, Pending Claims, Number					239	1
Loss Contingency, Claims Settled and Dismissed, Number					37
Number of cases terminated					174
Unresolved cases				28
Loss Contingency, Damages Awarded, Value							30,000
Loss Contingency, Loss in Period		412,000
Loss Contingency Accrual		377,000
Other Accrued Liabilities		$ 35,000
Number of monthly payments to pay per damanges value	29