Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Accounting Policies [Abstract]

Reconciliation of Cash and Cash Equivalents

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the balance sheets and as presented as cash, cash equivalents and restricted cash in the statements of cash flows.

	December 31, 2019		December 31, 2018
	(in thousands)
Cash and cash equivalents	$	6,316	$	9,140
Restricted cash	455		455
Total	$	6,771	$	9,595

Reconciliation of Restricted Cash

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the balance sheets and as presented as cash, cash equivalents and restricted cash in the statements of cash flows.

	December 31, 2019		December 31, 2018
	(in thousands)
Cash and cash equivalents	$	6,316	$	9,140
Restricted cash	455		455
Total	$	6,771	$	9,595

Schedule of Outstanding Common Stock Equivalents Excluded from Computations of Diluted Net Loss per Common Share

The following outstanding common stock equivalents were excluded from the computations of diluted net loss per common share for the periods presented as the effect of including such securities would be antidilutive:

	December 31, 2019	December 31, 2018
	(shares)
Warrants to purchase common stock	274,524	274,524
Options to purchase common stock	2,260,307	1,309,994
Total	2,534,831	1,584,518

Schedule of Adoption of New Lease Standard

The adoption of the new leases standard resulted in the following adjustments to the Company's balance sheet as of January 1, 2019:

	December 31, 2018		Adoption Impact			January 1, 2019
	(in thousands)
Operating lease right-of-use assets	$	—	$	6,415		$	6,415
Operating lease liabilities, current portion	$	—	$	945		$	945
Other accrued liabilities	$	2,414	$	(143	)	$	2,271
Operating lease liabilities, long-term portion	$	—	$	6,900		$	6,900
Deferred rent	$	1,287	$	(1,287	)	$	—