Condensed Consolidated Balance Sheets - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 126,550,000	$ 14,472,000
Short-term investments	16,968,000	17,971,000
Restricted cash	175,000	5,333,000
Prepaid and other current assets	1,740,000	1,333,000
Total current assets	145,433,000	39,109,000
Deposits, noncurrent	128,000	128,000
Property and equipment, net	325,000	276,000
Total assets	145,886,000	39,513,000
Current liabilities:
Accounts payable	1,437,000	747,000
Accrued compensation	511,000	1,366,000
Other accrued liabilities	952,000	1,322,000
Deferred revenue, current portion		212,000
Deferred rent, current portion		7,000
Redeemable convertible notes		5,085,000
Total current liabilities	2,900,000	8,739,000
Deferred rent, noncurrent portion	135,000
Total liabilities	3,035,000	8,739,000
Stockholders’ equity:
Preferred stock, $0.001 par value, 5,000,000 shares authorized; 0 and 3,680 shares issued and outstanding at March 31, 2018 and December 31, 2017, respectively
Common stock, $0.001 par value, 100,000,000 shares authorized; 11,935,081 and 6,081,230 shares issued and outstanding at March 31, 2018 and December 31, 2017, respectively	12,000	6,000
Additional paid-in capital	321,172,000	204,262,000
Accumulated other comprehensive income (loss)	(4,000)
Accumulated deficit	(178,329,000)	(173,494,000)
Total stockholders’ equity	142,851,000	30,774,000
Total liabilities and stockholders’ equity	$ 145,886,000	$ 39,513,000

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).

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of obligations, excluding pension and other postretirement benefits, incurred through that date and payable for perquisites provided to employees pertaining to services received from them. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).