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Note 7 - Marketable Securities, Available-for-sale (Tables)

6 Months Ended

Jun. 30, 2017

Schedule of Available-for-sale Securities Reconciliation [Table Text Block]

	June 30, 2017							December 31, 2016
	Amortized Cost		Gross Unrealized Losses			Estimated Fair Value		Amortized Cost		Gross Unrealized Losses			Estimated Fair Value
	(Dollars in thousands)
Type of security:
Municipal bond and metropolitan district securities	$	24,994	$	(465	)	$	24,529	$	18,563	$	(465	)	$	18,098

Available-for-sale Securities [Table Text Block]

	June 30, 2017
	(Dollars in thousands)
Contractual maturity:
Maturing in one year or less	$	―
Maturing after three years		24,529
Total marketable securities, available-for-sale	$	24,529

- 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