PROGOLD LIMITED LIABILITY COMPANY (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
ProGold LLC
ProGold Limited Liability Company
Ownership percentage in joint venture	49.00%
ProGold LLC
Financial information for ProGold LLC
Current Assets	$ 211	$ 220	$ 230
Long-Term Assets	39,113	38,645	38,962
Total Assets	39,324	38,865	39,192
Current Liabilities	88	7	5
Long-Term Liabilities	2,292	1,458	2,333
Total Liabilities	2,380	1,465	2,338
Members' Equity	36,944	37,400	36,854
Total Liabilities and Members' Equity	39,324	38,865	39,192
Rent Revenue on Operating Lease	4,833	4,679	19,085
Expenses	867	689	3,455
Net Income	$ 3,966	$ 3,990	$ 15,630