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Note 17 - Subsequent Events (Details Textual)
May. 03, 2016
USD ($)
ft²
Office and Light Manufacturing Facility Lease Agreement [Member] | Subsequent Event [Member]  
Area of Real Estate Property | ft² 49,386
Lessee Leasing Arrangements, Operating Leases, Term of Contract 11 years
Operating Leases, Estimate of Triple Net Operating Expenses Over the Term of the Lease $ 1,980,000
Operating Leases, Percentage By Which the Base Rent Will Be Abated, Months 1 Through 24 50.00%
Operating Leases, Percentage By Which Operating Expenses Will Be Abated, Months 1 Through 6 100.00%
Operating Leases, Percentage By Which Operating Expenses Will Be Abated, Months 7 Through 24 50.00%
Lessee Leasing Arrangements, Operating Leases, Renewal Term 5 years
Lessee Leasing Arrangements, Operating Leases, Subsequent Renewal Term 5 years
Operating Leases, Future Minimum Payments Due $ 7,131,000