Note 2 - Investments (Tables)

9 Months Ended

Sep. 30, 2017

Available-for-sale Securities [Table Text Block]

	September 30, 2017							December 31, 2016
	Amortized cost		Unrealized loss			Fair value		Amortized cost		Unrealized loss			Fair value
Corporate bonds	$	32,987	$	(14	)	$	32,973	$	22,100	$	(46	)	$	22,054
Municipal bonds		—		—			—		3,727		(1	)		3,726
Agency bonds		—		—					3,339		(2	)		3,337
Total	$	32,987	$	(14	)	$	32,973	$	29,166	$	(49	)	$	29,117

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

+ References + Details