Marketable securities (Tables)

12 Months Ended

Dec. 31, 2015

Investments, Debt and Equity Securities [Abstract]

Available-for-sale Securities [Table Text Block]

The value at cost, gross unrealized holding gains or losses, and fair value of the Company’s available-for-sale marketable securities are summarized below as of December 31:

	2015		2014
Value at cost	$	79,885	$	53,272
Gross unrealized holding gains		-		-
Gross unrealized holding losses		(147)		(198)
Fair value	$	79,738	$	53,074

- 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.

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