Condensed Consolidated Statements of Equity - USD ($)		Total	Common Stock	Additional paid-in capital	Accumulated deficit	Accumulated other comprehensive income (loss)	Total electroCore, Inc. stockholders' equity	Noncontrolling interest
Balance at Dec. 31, 2019		$ 24,897,118	$ 29,835	$ 107,752,066	$ (83,479,098)	$ (41,295)	$ 24,261,508	$ 635,610
Balance, shares at Dec. 31, 2019			29,835,183
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss		(7,959,349)			(7,959,349)		(7,959,349)
Other comprehensive income		51,148				51,148	51,148
Equity financing commitment fee	[1]		$ 462	(462)
Equity financing commitment fee, shares	[1]		461,676
Issuance of stock related to employee compensation plans, net of forfeitures			$ 125	(125)
Issuance of stock related to employee compensation plans, net of forfeitures, shares			124,568
Share based compensation		744,865		744,865			744,865
Balance at Mar. 31, 2020		17,733,782	$ 30,422	108,496,344	(91,438,447)	9,853	17,098,172	635,610
Balance, shares at Mar. 31, 2020			30,421,427
Balance at Dec. 31, 2019		24,897,118	$ 29,835	107,752,066	(83,479,098)	(41,295)	24,261,508	635,610
Balance, shares at Dec. 31, 2019			29,835,183
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss		(12,700,877)
Balance at Jun. 30, 2020		21,542,852	$ 38,815	117,154,945	(96,179,975)	(106,543)	20,907,242	635,610
Balance, shares at Jun. 30, 2020			38,815,145
Balance at Dec. 31, 2019		24,897,118	$ 29,835	107,752,066	(83,479,098)	(41,295)	24,261,508	635,610
Balance, shares at Dec. 31, 2019			29,835,183
Balance at Dec. 31, 2020		23,644,582	$ 45,560	130,205,027	(106,990,148)	(251,467)	23,008,972	635,610
Balance, shares at Dec. 31, 2020			45,559,765
Balance at Mar. 31, 2020		17,733,782	$ 30,422	108,496,344	(91,438,447)	9,853	17,098,172	635,610
Balance, shares at Mar. 31, 2020			30,421,427
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss		(4,741,528)			(4,741,528)		(4,741,528)
Other comprehensive income		(116,396)				(116,396)	(116,396)
Issuance of stock		7,831,535	$ 8,028	7,823,507			7,831,535
Issuance of stock, shares			8,028,372
Equity financing commitment fee	[1]		$ 181	(181)
Equity financing commitment fee, shares	[1]		181,273
Issuance of stock related to employee compensation plans, net of forfeitures			$ 184	(184)
Issuance of stock related to employee compensation plans, net of forfeitures, shares			184,073
Share based compensation		1,002,758		1,002,758			1,002,758
Financing fees		(167,299)		(167,299)			(167,299)
Balance at Jun. 30, 2020		21,542,852	$ 38,815	117,154,945	(96,179,975)	(106,543)	20,907,242	635,610
Balance, shares at Jun. 30, 2020			38,815,145
Balance at Dec. 31, 2020		23,644,582	$ 45,560	130,205,027	(106,990,148)	(251,467)	23,008,972	635,610
Balance, shares at Dec. 31, 2020			45,559,765
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss		(5,383,832)			(5,383,832)		(5,383,832)
Other comprehensive income		144,144				144,144	144,144
Issuance of stock		6,920,350	$ 2,750	6,917,600			6,920,350
Issuance of stock, shares			2,750,000
Issuance of stock related to employee compensation plans, net of forfeitures			$ 18	(18)
Issuance of stock related to employee compensation plans, net of forfeitures, shares			17,599
Settlement of accrued bonus		399,997	$ 165	399,832			399,997
Settlement of accrued bonus, shares			165,413
Share based compensation		942,183		942,183			942,183
Balance at Mar. 31, 2021		26,667,424	$ 48,493	138,464,624	(112,373,980)	(107,323)	26,031,814	635,610
Balance, shares at Mar. 31, 2021			48,492,777
Balance at Dec. 31, 2020		23,644,582	$ 45,560	130,205,027	(106,990,148)	(251,467)	23,008,972	635,610
Balance, shares at Dec. 31, 2020			45,559,765
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss		(8,277,584)
Balance at Jun. 30, 2021		24,616,506	$ 48,690	139,302,400	(115,267,732)	(102,462)	23,980,896	635,610
Balance, shares at Jun. 30, 2021			48,690,424
Balance at Mar. 31, 2021		26,667,424	$ 48,493	138,464,624	(112,373,980)	(107,323)	26,031,814	635,610
Balance, shares at Mar. 31, 2021			48,492,777
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss		(2,893,752)					(2,893,752)
Other comprehensive income		4,861				4,861	4,861
Issuance of stock related to employee compensation plans, net of forfeitures			$ 197	(197)
Issuance of stock related to employee compensation plans, net of forfeitures, shares			197,647
Share based compensation		837,973		837,973			837,973
Balance at Jun. 30, 2021		$ 24,616,506	$ 48,690	$ 139,302,400	$ (115,267,732)	$ (102,462)	$ 23,980,896	$ 635,610
Balance, shares at Jun. 30, 2021			48,690,424

[1] Reflects commitment shares issued in accordance with the Company's equity facility purchase agreement with Lincoln Park. For additional information see Note 11. Lincoln Park Stock Purchase Agreement.