Condensed Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash	$ 153,117	$ 180,460
Prepaid expenses and other current assets	4,050	3,468
Total current assets	157,167	183,928
Property and equipment, net	1,594	1,663
Right-of-use lease assets	1,526	1,581
Restricted cash	714	714
Other	983	941
Total assets	161,984	188,827
Current liabilities:
Accounts payable	14,894	15,583
Accrued expenses	9,871	8,881
Lease liabilities, current portion	279	315
Total current liabilities	25,044	24,779
Lease liabilities, less current portion	1,696	1,748
Total liabilities	26,740	26,527
Commitments and contingencies (Note 5)
Stockholders' equity:
Common stock, $0.01 par value—100,000,000 shares authorized; 32,076,095 and 32,050,906 shares issued and outstanding at March 31, 2020 and December 31, 2019, respectively	301	300
Additional paid-in capital	405,183	402,077
Accumulated deficit	(270,240)	(240,077)
Total stockholders' equity	135,244	162,300
Total liabilities and stockholders' equity	$ 161,984	$ 188,827

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 incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).