Note 11 - Commitments and Contingencies (Details) (USD $)	0 Months Ended	12 Months Ended
	Dec. 30, 2009	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Note 11 - Commitments and Contingencies (Details) [Line Items]
Lessee Leasing Arrangements, Operating Leases, Term of Contract		10 years
Operating Leases, Rent Expense	$ 1,401,317		$ 1,400,120	$ 2,486,849
Product Warranty Accrual		$ 0	$ 0
First Three Renewal Options [Member] | Bedford, Massachusetts [Member]
Note 11 - Commitments and Contingencies (Details) [Line Items]
Lessee Leasing Arrangements, Operating Leases, Renewal Term		5 years
Final Renewal Option [Member] | Bedford, Massachusetts [Member]
Note 11 - Commitments and Contingencies (Details) [Line Items]
Lessee Leasing Arrangements, Operating Leases, Renewal Term		6 years
Bedford, Massachusetts [Member]
Note 11 - Commitments and Contingencies (Details) [Line Items]
Area of Real Estate Property (in Square Feet)		134,000
Option to Extend Operating Lease Term, Number of Periods		4
Abano Terme, Italy [Member]
Note 11 - Commitments and Contingencies (Details) [Line Items]
Area of Real Estate Property (in Square Feet)	28,000
Lessee Leasing Arrangements, Operating Leases, Term of Contract	6 years