Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 98,013	$ 103,670
Short-term investments	8,617	8,091
Prepaid and other current assets	1,264	889
Total current assets	107,894	112,650
Property and equipment, net	4,354	3,014
Right-of-use asset	3,001
Other noncurrent assets	455	452
Total assets	115,704	116,116
Current liabilities
Accounts payable	1,126	888
Current portion of lease liability	418
Accrued expenses and other current liabilities	1,698	1,708
Total current liabilities	3,242	2,596
Lease liability	2,976
Other noncurrent liabilities		294
Total liabilities	6,218	2,890
Commitments and contingencies (Note 5)
Stockholders' equity
Preferred stock; $0.00001 par value; 20,000,000 shares authorized at March 31, 2019 (unaudited) and December 31, 2018; 2,061,773 shares issued, and no shares outstanding at March 31, 2019 (unaudited) and December 31, 2018	0	0
Common stock; $0.00001 par value; 80,000,000 shares authorized at March 31, 2019 (unaudited) and December 31, 2018; 14,443,569 and 14,428,916 shares issued and outstanding at March 31, 2019 (unaudited) and December 31, 2018, respectively	0	0
Additional paid-in capital	133,540	133,183
Accumulated other comprehensive income	16	2
Accumulated deficit	(24,070)	(19,959)
Total stockholders' equity	109,486	113,226
Total liabilities and stockholders' equity	$ 115,704	$ 116,116