Summary of Significant Accounting Policies - Assets and Liabilities of Global Wells (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Cash and cash equivalents	$ 1,679,000	$ 448,000
Accounts receivable	33,276,000	23,838,000
Prepaid expenses and other current assets	5,690,000	6,530,000
Property and equipment, net	94,041,000	95,533,000
Other assets	399,000	161,000
Total assets	203,490,000	181,104,000
Accounts payable	19,028,000	20,069,000
Accrued expenses	8,161,000	4,959,000
Customer deposits	1,125,000	551,000
Due to Lollicup USA Inc.	2,611,000	5,038,000
Long-term debt, current portion	1,166,000	11,364,000
Long-term debt, net of current portion	200,000	100,000
Other liabilities	4,051,000	5,049,000
Total liabilities	78,481,000	141,236,000
Global Wells
Variable Interest Entity [Line Items]
Cash and cash equivalents	689,000	81,000
Accounts receivable	396,000	343,000
Prepaid expenses and other current assets	87,000	98,000
Property and equipment, net	46,916,000	47,826,000
Other assets	4,882,000	5,260,000
Total assets	52,970,000	53,608,000
Accounts payable	29,000	564,000
Accrued expenses	447,000	128,000
Customer deposits	82,000	0
Due to Lollicup USA Inc.	2,620,000	2,990,000
Long-term debt, current portion	1,166,000	694,000
Long-term debt, net of current portion	35,629,000	36,697,000
Other liabilities	2,851,000	3,906,000
Total liabilities	$ 42,824,000	$ 44,979,000