Note 9 - Short-term Debt
 12 Months Ended
Dec. 31, 2016
Notes to Financial Statements  
Short-term Debt [Text Block]
9.
Short-Term Debt
 
Short-term debt totaled
$0
and
$700
as of
December
31,
2016
and
December
31,
2015,
respectively, and consisted of borrowings under a line of credit facility, with a fixed interest rate of
2.1%.
All borrowings were fully repaid upon maturity of the facility on
August
26,
2016.
Interest expense related to outstanding borrowings was
$9,
$4,
and
$0
for the years ended
December
31,
2016,
2015,
and
2014,
respectively.
 
This credit facility required the Company to maintain collateral for the full amount of the facility. Following maturity of the facility all collateral requirements have been removed.