Note 5 - Commitments and Contingencies (Details Textual) $ in Millions |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2016
USD ($)
ft²
|
Dec. 31, 2015
USD ($)
|
Dec. 31, 2014
USD ($)
|
|
Operating Lease, Annual Rent Expense | $ 2.0 | ||
Operating Leases, Rent Expense | 2.1 | $ 1.5 | $ 1.4 |
Purchase Obligation | 6.7 | ||
Unrecorded Unconditional Purchase Obligation | $ 4.6 | ||
San Diego [Member] | |||
Area of Real Estate Property | ft² | 28,275 | ||
Lessee Leasing Arrangements, Operating Leases, Renewal Term | 5 years | ||
Redwood City [Member] | |||
Area of Real Estate Property | ft² | 26,067 | ||
Jersey City [Member] | |||
Area of Real Estate Property | ft² | 1,898 |