CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash Flows From Operating Activities:
Net (loss) income	$ (5,622)	$ 4,670
Adjustments required to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	0	44
Changes in accrued liability for employee severance benefits, net of retirement fund profit	0	10
Stock-based compensation	856	893
Gain on the sale of the MST Franchise	0	(13,005)
Changes in operating assets and liabilities:
Decrease in trade receivables	68	7,984
Decrease in inventory	0	97
Decrease in prepaid expenses and other assets and operating lease right of use asset	(268)	100
Decrease in trade payables, accrued expenses, employee related obligations and other long term liabilities	(512)	(9,600)
Decrease in operating lease liabilities	0	(232)
Net cash used in operating activities	(5,478)	(9,039)
Cash Flows From Investing Activities:
Net proceeds from the sale of the MST Franchise	5,000	15,752
Net cash provided by investing activities	5,000	15,752
Cash Flows From Financing Activities:
Proceeds from issuance from secondary offering	156	1,557
Redemption of convertible preferred stock	(360)	0
Withholdings related to issuance of stock for stock-based compensation arrangements, net	(13)	(25)
Net cash (used in) provided by financing activities	(217)	1,532
(Decrease) increase in cash, cash equivalents and restricted cash	(695)	8,245
Cash, cash equivalents and restricted cash at beginning of the period	30,975	42,855
Cash, cash equivalents and restricted cash at end of the period	30,280	51,100
Cash and cash equivalents	30,213	50,495
Restricted cash	67	605
Total cash, cash equivalents and restricted cash shown in statement of cash flows	30,280	51,100
Supplementary information on investing and financing activities not involving cash flows:
Amount due from sale of MST Franchise	0	5,000
Accretion of preferred stock	$ 149	$ 0