Note 9 - Equity-method Investment (Tables)

3 Months Ended

Mar. 31, 2016

Consolidated Statement of Operations [Member]

Notes Tables

Equity Method Investments [Table Text Block]

	Three Months Ended March 31,
	2016		2015
Asset impairments to write investment down to fair value	$	3,498	$	4,130
Our portion of the partnership’s operating losses		2,066		1,732
Non-cash interest expense related to the amortization of the discounted fair value of future equity contributions		92		211
Tax benefits and credits generated		5,945		7,250

Consolidated Balance Sheet [Member]

Notes Tables

Equity Method Investments [Table Text Block]

	March 31, 2016		December 31, 2015
Carrying value, recorded as a component of other non-current assets	$	16,721	$	22,284
Present value of obligation associated with future equity contributions, recorded as a component of accrued liabilities and other long-term liabilities		16,930		22,511