Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities:
Net loss	$ (12,027)	$ (10,862)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation expense	120	78
Noncash interest expense	147	178
Amortization of intangible assets	95	76
Net changes in operating lease ROU assets and liabilities	(10)	(8)
Inventory excess and obsolescence charge	576	845
Stockbased compensation expense	1,128	901
Change in operating assets and liabilities:
Accounts receivable, net	(18)	(85)
Inventory	(3,860)	(3,505)
Prepaid expenses and other current assets	398	497
Accounts payable	3,662	3,274
Accrued expenses and other current and long-term liabilities	(1,691)	(1,920)
Foreign currency remeasurement loss	(94)	101
Net cash used in operating activities	(11,574)	(10,430)
Cash flows from investing activities:
Purchase of property and equipment	(115)	(336)
Net cash used in investing activities	(115)	(336)
Cash flows from financing activities:
Proceeds from exercise of stock options	44	7
Payment of withholding taxes related to stock-based compensation to employees	(279)	(153)
Net cash used in financing activities	(235)	(146)
Effect of exchange rate on cash and cash equivalents	29	(3)
Net decrease in cash and cash equivalents	(11,895)	(10,915)
Cash and cash equivalents, beginning of period	42,019	43,931
Cash and cash equivalents, end of period	30,124	33,016
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	1,099	733
Supplemental disclosures of noncash investing and financing activities:
Property and equipment in accounts payable and accrued expenses and other current liabilities	$ 18	16
Operating lease ROU asset exchanged for operating lease liabilities		1,374
Tenant improvement and deferred rent reclassified to operating lease liabilities		380
Operating lease liabilities assumed for operating lease ROU assets		$ (1,754)