BANK OF SOUTH CAROLINA CORPORATION - PARENT COMPANY (Details 1) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Condensed Income Statements, Captions [Line Items]
Interest income	$ 4,379,635	$ 4,220,147	$ 4,127,206	$ 4,207,354	$ 4,466,079	$ 4,613,808	$ 4,568,119	$ 4,449,075	$ 16,934,342	$ 18,097,081	$ 17,442,525
Net income	$ 1,735,206	$ 1,703,271	$ 1,501,023	$ 1,521,131	$ 1,773,529	$ 2,014,791	$ 1,840,847	$ 1,689,264	6,460,631	7,318,433	6,922,934
Bank of South Carolina Corporation - Parent [Member]
Condensed Income Statements, Captions [Line Items]
Interest income									759	1,280	1,157
Net operating expenses									(255,409)	(221,510)	(224,316)
Dividends received from bank									4,700,000	4,170,000	3,775,000
Equity in undistributed earnings of subsidiary									2,015,281	3,368,663	3,371,093
Net income									$ 6,460,631	$ 7,318,433	$ 6,922,934