CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - USD ($)	Jun. 30, 2022	Dec. 31, 2021
Cash and cash equivalents	$ 3,501,000	$ 6,483,000
Allowance for doubtful accounts	1,734,000	583,000
Prepaid expenses and other current assets	6,691,000	5,141,000
Property and equipment, net	95,044,000	93,475,000
Other assets	840,000	477,000
Accounts payable	23,325,000	18,470,000
Accrued expenses	7,873,000	7,813,000
Income taxes payable	0	85,000
Customer deposits	1,619,000	1,215,000
Long-term debt, current portion	910,000	1,178,000
Long-term debt, net of current portion	239,000	200,000
Other liabilities	$ 3,004,000	$ 3,837,000
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	19,832,417	19,827,417
Common stock, shares outstanding (in shares)	19,809,417	19,804,417
Treasury stock, par value (in dollars per share)	$ 0.001	$ 0.001
Treasury stock, shares (in shares)	23,000	23,000
VIE, Primary Beneficiary
Cash and cash equivalents	$ 932,000	$ 1,163,000
Allowance for doubtful accounts	6,000	24,000
Prepaid expenses and other current assets	200,000	63,000
Property and equipment, net	46,006,000	46,612,000
Other assets	60,000	65,000
Accounts payable	4,000	136,000
Accrued expenses	281,000	68,000
Income taxes payable	0	9,000
Customer deposits	81,000	88,000
Long-term debt, current portion	910,000	1,178,000
Long-term debt, net of current portion	42,016,000	35,339,000
Debt discount	239,000	200,000
Other liabilities	$ 1,324,000	$ 2,637,000