Note 5 - Commitments and Contingencies (Details Textual) SFr in Millions	6 Months Ended
	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2016 CHF (SFr)	Jun. 30, 2016 USD ($)	Dec. 31, 2015 USD ($)
Inventories [Member] | Accrued Expenses [Member]
Purchase Commitment, Amount Executed | SFr			SFr 1.0
Inventories [Member]
Purchase Commitment, Amount Executed | SFr			1.9
Acquisition of Raw Materials [Member] | Accrued Expenses [Member]
Purchase Commitment, Amount Executed | SFr			0.3
Acquisition of Raw Materials [Member]
Purchase Commitment, Amount Executed | SFr			0.3
Inventories, Four Batches [Member]
Purchase Commitment, Amount Executed			SFr 7.6	$ 7,800,000
Accrued Expenses [Member]
Purchase Commitment, Amount Executed				1,300,000
Letters of Credit Outstanding, Amount				14,000	$ 14,000
Loans Pledged as Collateral				14,000	$ 14,000
Operating Leases, Rent Expense	$ 91,000	$ 93,000
Security Deposit				$ 14,000