Note 7 - Available-for-Sale Investments (Tables)

3 Months Ended

Mar. 31, 2016

Investments, Debt and Equity Securities [Abstract]

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

	Amortized cost				Fair value
	March 31, 2016		December 31, 2015		March 31, 2016		December 31, 2015
Bonds, notes and other securities:
U.S. government and agencies	$	0	$	100	$	0	$	100
Total short-term investments	$	0	$	100	$	0	$	100
Asset-backed securities (1)	$	37	$	37	$	32	$	33
Total long-term investments	$	37	$	37	$	32	$	33