Summary of Significant Accounting Policies - Assets and Liabilities of Global Wells (Details) - USD ($)	Jun. 30, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Cash and cash equivalents	$ 7,682,000	$ 448,000
Accounts receivable	32,598,000	23,838,000
Prepaid expenses and other current assets	3,431,000	6,530,000
Property and equipment, net	92,936,000	95,533,000
Other assets	70,000	161,000
Total assets	207,083,000	181,104,000
Accounts payable	24,354,000	20,069,000
Accrued expenses	6,584,000	4,959,000
Customer deposits	1,209,000	551,000
Due to Lollicup USA Inc.	3,608,000	5,038,000
Long-term debt, current portion	711,000	11,364,000
Other liabilities	4,205,000	5,049,000
Total liabilities	86,995,000	141,236,000
Global Wells
Variable Interest Entity [Line Items]
Cash and cash equivalents	234,000	81,000
Accounts receivable	380,000	343,000
Prepaid expenses and other current assets	93,000	98,000
Property and equipment, net	47,219,000	47,826,000
Other assets	4,992,000	5,260,000
Total assets	52,918,000	53,608,000
Accounts payable	6,000	564,000
Accrued expenses	337,000	128,000
Customer deposits	82,000	0
Due to Lollicup USA Inc.	2,620,000	2,990,000
Long-term debt, current portion	711,000	694,000
Long-term debt, net of current portion	36,343,000	36,697,000
Other liabilities	3,005,000	3,906,000
Total liabilities	$ 43,104,000	$ 44,979,000