BANK OF SOUTH CAROLINA CORPORATION - PARENT COMPANY (Details 2) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net income	$ 1,806,194	$ 1,778,153	$ 1,726,357	$ 1,612,230	$ 848,699	$ 1,440,653	$ 1,386,385	$ 1,226,088	$ 6,922,934	$ 4,901,825	$ 5,247,063
Stock-based compensation expense									72,408	71,701	76,529
Net cash provided by operating activities									9,317,058	8,181,957	6,042,824
Cash flows from financing activities:
Stock options exercised									193,569	340,843	405,749
Net cash (used in) provided by financing activities									(24,016,188)	27,873,803	11,596,273
Supplemental disclosure for non-cash investing and financing activity:
Change in dividends payable									85,615	53,340	54,706
Bank of South Carolina Corporation - Parent [Member]
Cash flows from operating activities:
Net income									6,922,934	4,901,825	5,247,063
Stock-based compensation expense									72,408	71,701	76,529
Equity in undistributed earnings of subsidiary									(3,371,093)	(2,406,213)	(3,084,104)
Decrease in other assets									(51,355)	(51,197)	(55,923)
(Decrease) increase in other liabilities									(6,333)	151
Net cash provided by operating activities									3,566,561	2,516,267	2,183,565
Cash flows from financing activities:
Dividends paid									(3,699,845)	(2,832,489)	(2,613,715)
Stock options exercised									193,569	340,843	405,749
Net cash (used in) provided by financing activities									(3,506,276)	(2,491,646)	(2,207,966)
Net increase (decrease) in cash									60,285	24,621	(24,401)
Cash at the beginning of the year				$ 947,216				$ 922,595	947,216	922,595	946,996
Cash at the end of the year	$ 1,007,501				$ 947,216				1,007,501	947,216	922,595
Supplemental disclosure for non-cash investing and financing activity:
Change in dividends payable									$ 85,615	$ 53,340	$ 74,706