STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (3,851)	$ (7,478)
Adjustments to reconcile Net loss to net cash (used in) provided by operating activities:
Depreciation and amortization	285	169
Stock-based compensation	2,455	6,400
Bad debt expense	(17)	0
Gain on forgiveness of unsecured promissory note	0	(10)
Changes in assets and liabilities:
(Increase) in accounts receivable	(428)	(72)
Decrease (increase) in other current assets	34	(302)
(Increase) in other assets	0	(4)
(Decrease) increase in accounts payable and accrued expenses	(568)	1,551
(Decrease) increase in deferred revenue	(367)	862
(Decrease) in liability for shares withheld	(1,023)	0
Net cash (used in) provided by operating activities	(3,480)	1,116
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of short-term investments	(4,880)	0
Capital expenditures	(192)	(662)
Net cash (used in) investing activities	(5,072)	(662)
CASH FLOWS FROM FINANCING ACTIVITIES:
Return of repayment of unsecured promissory note	0	10
Net proceeds from issuance of common stock from exercise of stock options	0	47
Proceeds of insurance financing arrangement	319	0
Repayment of insurance financing arrangement	(222)	0
Proceeds from issuance of common stock from exercise of warrants	0	19
Net cash provided by financing activities	97	76
Net (decrease) increase in cash	(8,455)	530
CASH, beginning of year	13,651	13,121
CASH, end of year	5,196	13,651
Supplemental disclosures of noncash investing and financing activities:
Reclassification of stock option awards	0	1,411
Supplemental disclosures of cash flow information:
Cash paid for interest	5	0
Cash paid for income taxes	$ 31	$ 0