4. Investments (Tables)

3 Months Ended

Mar. 31, 2016

Investments Schedule [Abstract]

Investments, Held-to-Maturity Securities

The amortized cost and fair value of our investments, and the related gross unrealized gains and losses, were as follows as of March 31, 2016 (in thousands):

			Gross Unrealized
	Cost		Gains		Losses		Fair Value
Short-term Investments:
Corporate bonds	$	39	$	--	$	--	$	39
Long-term Investments
Corporate bonds	$	5,210	$	1	$	--	$	5,211

The amortized cost and fair value of our investments, and the related gross unrealized gains and losses, were as follows as of December 31, 2015 (in thousands):

			Gross Unrealized
	Cost		Gains		Losses			Fair Value
Short-term Investments:
Corporate bonds	$	44	$	--	$	--		$	44
Long-term Investments
Corporate bonds	$	5,555	$	--	$	(30	)	$	5,525

Investments, Available for sale

			Gross Unrealized
	Cost		Gains		Losses		Fair value
As of March 31, 2016:
Long-term Investments:
Equity investments	$	5,552	$	330	$	--	$	5,882

			Gross Unrealized
	Cost		Gains		Losses		Fair value
As of December 31, 2015:
Long-term Investments:
Equity investments	$	3,876	$	435	$	--	$	4,311