Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 26,735	$ 13,156
Prepaid expenses	767	136
Total current assets	27,502	13,292
Property and equipment, net	773	119
Other long-term assets, net	52	32
Total assets	28,327	13,443
Current liabilities:
Accounts payable	1,421	539
Accrued liabilities	603	254
Total current liabilities	2,024	793
Warrant liability		520
Total liabilities	2,024	1,313
Commitments and contingencies (Note 14)
Redeemable convertible preferred stock - Series A $0.001 par value, 10,000,000 shares authorized as of December 31, 2018 and 2017; no shares and 6,685,082 shares issued and outstanding as of December 31, 2018 and 2017, respectively; aggregate liquidation preference of $0 and $20,698 as of December 31, 2018 and 2017, respectively		19,004
Stockholders' equity (deficit)
Common stock, $0.001 par value; 50,000,000 shares authorized as of December 31, 2018 and 2017; 17,607,928 and 6,000,000 shares issued and outstanding at December 31, 2018 and 2017, respectively	18	6
Additional paid-in capital	72,153	1,759
Accumulated deficit	(45,868)	(8,639)
Total stockholders' equity (deficit)	26,303	(6,874)
Total liabilities, redeemable convertible preferred stock and stockholders' equity (deficit)	$ 28,327	$ 13,443

Warrant liability non-current.

No definition available.

Name:	ETON_WarrantLiabilityNoncurrent
Namespace Prefix:	ETON_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).