Note 13 - Subsequent Events (Tables)

6 Months Ended

Jun. 30, 2018

Notes Tables

Schedule of Line of Credit Facilities [Table Text Block]

Interest rates:
Spread over the London Interbank Offer Rate	2.25	-	3.25%
Spread over alternative base rate	1.25	-	2.25%
Standby fee per annum on undrawn amounts		0.50%
Covenant financial ratios:
Senior leverage ratio (debt secured by liens/EBITDA)	not more than 2.50:1
Leverage ratio (total debt less unencumbered cash/EBITDA)	not more than 4.00:1
Interest coverage ratio (EBITDA/interest expense)	not less than 3.00:1

Revolving Credit Facility [Member]

Notes Tables

Schedule of Line of Credit Facilities [Table Text Block]

Interest rates:
Spread over the London Interbank Offer Rate	2.25	-	3.25%
Spread over alternative base rate	1.25	-	2.25%
Standby fee per annum on undrawn amounts		0.50%
Covenant financial ratios:
Senior leverage ratio (debt secured by liens/EBITDA)	not more than 2.50:1
Leverage ratio (total debt less unencumbered cash/EBITDA) (1)	not more than 4.00:1
Interest coverage ratio (EBITDA/interest expense)	not less than 3.00:1