DISCONTINUED OPERATIONS - Assets and Liabilities of Discontinued Operations (Details) - USD ($)	Jun. 30, 2021	Dec. 31, 2020
DISCONTINUED OPERATIONS
Cash and cash equivalents	$ 5,251	$ 5,551
Current assets discontinued operations	284,700	712,010
Current liabilities discontinued operations	138,461	742,064
Operations Segment
DISCONTINUED OPERATIONS
Accounts receivable, net	262,453	187,185
Prepaid expenses and other current assets	16,996	519,274
Current assets discontinued operations	279,449	706,459
Property and equipment, net	35,178	43,697
Noncurrent assets discontinued operations	35,178	43,697
Accounts payable and accrued expenses	34,187	169,492
Customer deposits	51,146	517,931
Current liabilities discontinued operations	$ 85,333	$ 687,423