Note 5 - Employee Retirement Benefit Plans (Details) - USD ($) $ in Thousands			12 Months Ended
	May. 01, 2015	Apr. 23, 2015	Dec. 31, 2015	Dec. 31, 2014	Apr. 21, 2015
Pension Plan Settlement Agreement, Amount Payable					$ 10,500
Pension Plan Settlement Agreement, Payment Schedule			with $1,500 due within ten days following the effective date of the Pension Settlement Agreement and the remainder paid in twelve annual installments of $750 beginning on October 31, 2015
Pension Plan Settlement Agreement, Stock Payable					88,117
Stock issued pursuant to Pension Plan Settlement Agreement		88,117
Pension Contributions	$ 1,500
Settled ERISA Liabilities					$ 46,000
Line of Credit Facility, Maximum Borrowing Capacity			$ 1,100
Stock Issued During Period, Value, Other		$ 70
Pension Settlement Obligation, Interest Rate					7.00%
401(k) Deferred Savings Plan
Contributions			168	$ 197
Intercreditor Agreement
Line of Credit Facility, Maximum Borrowing Capacity			6,500
Second Intercreditor Agreement
Line of Credit Facility, Maximum Borrowing Capacity			$ 3,000