DEBT (Details)	1 Months Ended	6 Months Ended	12 Months Ended
	Dec. 31, 2017 USD ($)	Jun. 30, 2020 USD ($) employee agreement	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Nov. 30, 2017 USD ($)
Long-term debt
Timeframe when amount will be repaid through property taxes		2 years
Other current liabilities		$ 40,581,000	$ 8,467,000
Construction Loan Agreement
Long-term debt
Face amount	$ 25,600,000
Amortization period	20 years
Initial investment				$ 16,400,000
Amount drawn from loan		24,500,000	25,000,000.0
Interest incurred, accrued for as an interest reserve		700,000	700,000
Interest costs capitalized		700,000
Debt issuance costs, net		200,000
Minimum liquidity covenant for construction loan		250,000,000
Construction Loan Agreement | 1-month LIBOR
Long-term debt
Variable rate	2.25%
Tax Increment Financing
Long-term debt
Face amount		$ 4,600,000	4,600,000
Number of agreements | agreement		2
Number of jobs required to create and maintain | employee		500
Term		5 years
Tax Increment Financing | Short-term other liabilities
Long-term debt
Other current liabilities		$ 1,100,000	$ 2,700,000
City Letter of Credit
Long-term debt
Interest-only payment, period	24 months
City Letter of Credit | Construction Loan Agreement
Long-term debt
Maximum borrowing capacity					$ 600,000