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Available-for-sale securities (Tables)

9 Months Ended

Sep. 30, 2015

Sep. 30, 2014

Investments, Debt and Equity Securities [Abstract]

Investments Classified by Contractual Maturity Date [Table Text Block]

The contractual maturities of available-for sale securities were as follows:



	September 30, 2015
(in thousands)	Less than 12 months		1-3 Years	Over 3 Years	Total
Certificates of deposit	$	1,751	—	—	1,751
Corporate bonds	453		4,122	1,507	6,082
Total	$	2,204	4,122	1,507	7,833

Available-for-sale Securities [Table Text Block]



	September 30, 2015
(in thousands)	Amortized Cost		Gains in Accumulated Other Comprehensive Loss	Losses in Accumulated Other Comprehensive Loss		Estimated Fair Value
Certificates of deposit	$	1,750	1	—		1,751
Corporate bonds	6,156		—	(74	)	6,082
Total	$	7,906	1	(74	)	7,833



	September 30, 2014
(in thousands)	Amortized Cost		Gains in Accumulated Other Comprehensive Loss	Losses in Accumulated Other Comprehensive Loss	Estimated Fair Value
Common stock	$	14,350	4,809	—	19,159

- 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