Note 12 - Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Notes Tables

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

Year Ending December 31,	Amount
201 8	$	2,891
201 9		2,871
2020		2,815
2021		2,515
202 2		2,495
2023 and thereafter		214
Future minimum lease payments	$	13,801

Gross rent expense recognized in the years ended

December 31, 2017,

2016 and 2015 was $1.5 million, $1.6 million and $1.5 million, respectively.

Schedule of Future Minimum Lease Payments for Capital Leases [Table Text Block]

Year Ending December 31,	Amount
201 8	$	472
201 9		381
20 20		104
Future minimum lease payments	$	957

Purchase Commitments