CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities:
Net loss	$ (16,914)	$ (2,582)
Adjustments to reconcile net loss to cash used in operating activities:
Depreciation and amortization	634	1,163
Amortization of right-of-use asset	741	693
Equity-based compensation	1,348	1,369
Amortization of long-term debt issuance costs and fees	0	477
Amortization of investments	0	(2)
Changes in fair value of investment in convertible notes receivable	2,000	0
Loss from sale of property and equipment	920	0
Other	0	39
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	733	3,051
Other noncurrent assets	38	(2,165)
Accounts payable	1,270	(3,052)
Accrued expenses	(399)	(5,186)
Deferred revenue	0	(28,826)
Other liabilities	(728)	(637)
Net cash used in operating activities	(10,357)	(35,658)
Cash flows from investing activities:
Purchase of available-for-sale securities	(2,000)	(1,499)
Proceeds from sale or maturity of available-for-sale securities	0	6,000
Capital expenditures	0	(10)
Proceeds from sale of property and equipment	922	205
Net cash (used in) provided by investing activities	(1,078)	4,696
Cash flows from financing activities:
Proceeds from common stock offering	5,440	5,040
Payment of common stock financing costs	(843)	(154)
Payment of long-term debt fees and issuance costs	0	(506)
Repayment of long-term debt	0	(7,500)
Proceeds from issuance of employee stock purchase plan	0	5
Proceeds from exercise of common stock warrants	0	14
Payment of exercise of common stock warrants	(800)	0
Payments for minimum statutory tax withholding related to net share settlement of equity awards	(123)	(4)
Net cash provided by (used in) financing activities	3,674	(3,105)
Net (decrease) in cash, cash equivalents, and restricted cash	(7,761)	(34,067)
Cash, cash equivalents, and restricted cash - beginning of year	9,777	43,844
Cash, cash equivalents, and restricted cash - end of year	$ 2,016	$ 9,777

The sum of the periodic adjustments of the differences between securities' face values and purchase prices that are charged against earnings. This is called accretion if the security was purchased at a discount and amortization if it was purchased at premium. As a noncash item, this element is an adjustment to net income when calculating cash provided by or used in operations using the indirect method.

Name:	us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- References

No definition available.