BANK OF SOUTH CAROLINA CORPORATION - PARENT COMPANY (Details 2) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities:
Net income	$ 848,699	$ 1,440,653	$ 1,386,385	$ 1,226,088	$ 1,312,879	$ 1,426,338	$ 1,312,110	$ 1,195,736	$ 4,901,825	$ 5,247,063	$ 4,884,288
Stock-based compensation expense									71,701	76,529	78,987
Net cash provided by operating activities									8,181,957	6,042,824	7,115,612
Cash flows from financing activities:
Dividends paid									(2,832,489)	(2,613,715)	(2,380,062)
Cash paid for fractional shares											(4,778)
Stock options exercised									340,843	405,749	122,946
Net cash used by financing activities									27,873,803	11,596,273	27,057,010
Supplemental disclosure for non-cash investing and financing activity:
Change in dividends payable									53,340	54,706	59,178
Bank of South Carolina Corporation - Parent [Member]
Cash flows from operating activities:
Net income									4,901,825	5,247,063	4,884,288
Stock-based compensation expense									71,701	76,529	78,987
Equity in undistributed earnings of subsidiary									(2,406,213)	(3,084,104)	(2,604,622)
Decrease (increase) in other assets									(51,197)	(55,923)	202,043
Increase in other liabilities									151
Net cash provided by operating activities									2,516,267	2,183,565	2,560,696
Cash flows from financing activities:
Dividends paid									(2,832,489)	(2,613,715)	(2,380,062)
Cash paid for fractional shares											(4,778)
Stock options exercised									340,843	405,749	122,946
Net cash used by financing activities									(2,491,646)	(2,207,966)	(2,261,894)
Net increase (decrease) in cash									24,621	(24,401)	298,802
Cash at the beginning of the year				$ 922,595				$ 946,996	922,595	946,996	648,194
Cash at the end of the year	$ 947,216				$ 922,595				947,216	922,595	946,996
Supplemental disclosure for non-cash investing and financing activity:
Change in dividends payable									$ 53,340	$ 54,706	$ 59,178