Condensed Balance Sheets (Unaudited) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Current Assets:
Cash and cash equivalents	$ 10,379,882	$ 8,691,155
Prepaid expenses	425,246	833,276
Other current assets	7,997
Total current assets	10,813,125	9,524,431
Other assets		7,997
Total assets	10,813,125	9,532,428
Current Liabilities:
Accounts payable and accrued expenses	498,134	927,606
Accrued compensation	513,509	760,782
Current portion of long-term debt		146,052
Total current liabilities	1,011,643	1,834,440
Warrant liability	5,098,404
Long-term debt, net of current portion		4,233,059
Total liabilities	6,110,047	6,067,499
Stockholders' equity:
Common stock, $0.0001 par value; authorized shares — 50,000,000; issued and outstanding shares - 12,350,360 and 7,201,774 at September 30, 2016 and December 31, 2015, respectively	1,235	720
Additional paid-in capital	61,983,643	51,524,821
Accumulated deficit	(57,281,800)	(48,060,612)
Total stockholders' equity	4,703,078	3,464,929
Total liabilities and stockholders' equity	$ 10,813,125	$ 9,532,428

Warrant liability.

No definition available.

Name:	evok_WarrantLiability
Namespace Prefix:	evok_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.