Note 5 -Operating Leases, and Long-term Debt and Equipment Financing - Summary of Long Term Debt (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Long-term debt	$ 48,046	$ 84,564
Less current portion of long-term debt	(25,949)	(48,262)
Noncurrent long-term debt and equipment financing	22,096	36,302
First Hansel Ford due on March 14, 2019 [Member]
Long-term debt		1,154
Second Hansel Ford due on March 14, 2019 [Member]
Long-term debt		1,154
Bank of the West due on January 1, 2020 [Member]
Long-term debt	1,454	18,058
Hansel Ford due on May 3, 2020 [Member]
Long-term debt	3,213	12,727
Bank of the West due on January 1, 2021 [Member]
Long-term debt	8,974	17,188
Savings Bank of Mendocino due on December 28, 2021 [Member]
Long-term debt	11,897	17,473
Pawnee Leasing due on May 15, 2022 [Member]
Long-term debt	11,131	16,810
Ally Financial due on July 1, 2024 [Member]
Long-term debt	$ 11,377

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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