Note 21 - Supplemental Guarantor Information (Details Textual)	3 Months Ended
	Mar. 31, 2019
Maximum Percentage of Consolidated Net Worth of Guarantor for Suspension of Guarantee	5.00%
Maximum Aggregate Percentage of Consolidated Net Worth of All Guarantors for Suspension of Guarantee	10.00%
Maximum Aggregate Percentage of Consolidated Net Worth of All Guarantors for Suspension of Guarantee to Permit Cure of Default	15.00%
All Guarantor Subsidiaries [Member]
Noncontrolling Interest, Ownership Percentage by Parent	100.00%