CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash Flows From Operating Activities:
Net loss	$ (15,680)	$ (3,806)
Adjustments required to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	0	56
Changes in accrued liability for employee severance benefits, net of retirement fund profit	0	50
Stock-based compensation	1,732	2,056
Gain on the sale of the MST Franchise	0	(13,005)
Changes in operating assets and liabilities:
(Increase) decrease in trade receivables	(61)	8,215
Decrease in inventory	0	97
Decrease in prepaid expenses and other assets	586	697
Decrease in trade payables, accrued expenses, employee related obligations, liability for employee severance benefits and other long term liabilities	(1,629)	(11,306)
Decrease in operating lease liabilities	0	(318)
Net cash used in operating activities	(15,052)	(17,264)
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 related to issuance of common stock through offerings, net of issuance costs	156	1,471
Redemption of convertible preferred stock	(360)	0
Withholdings related to issuance of stock for stock-based compensation arrangements, net	(18)	0
Net cash (used in) provided by financing activities	(222)	1,471
Decrease in cash, cash equivalents and restricted cash	(10,274)	(41)
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	20,701	42,814
Cash and cash equivalents	20,634	42,814
Restricted cash	67	0
Total cash, cash equivalents and restricted cash shown in statement of cash flows	20,701	42,814
Supplementary information on investing and financing activities not involving cash flows:
Issuance of vested shares under employee stock purchase plan	29	23
Amount due from sale of MST Franchise	0	5,000
Accretion of preferred stock	$ 149	$ 0