Note 13 - Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Long-term Purchase Commitment [Table Text Block]

			Payments Due by Period
Contractual Obligations	Total amounts committed		2022			2023-2024		2025-2026	After 5 years
Long-term debt (includes interest)	$	17,650,000	$	1,651,000	$	4,672,000	$	11,156,000	$	171,000
Future equipment purchases		44,760,000		2,000,000		42,760,000		—		—
Equipment service contracts		8,408,000		453,000		2,618,000		2,709,000		2,628,000
Operating leases		766,000		406,000		302,000		58,000		—
Total contractual obligations	$	71,584,000	$	4,510,000	$	50,352,000	$	13,923,000	$	2,799,000