Condensed Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities
Net loss	$ (811)	$ (2,660)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	821	872
Depreciation and amortization	252	213
Debt discount amortization	25	29
Changes in operating assets and liabilities:
Accounts receivable	(829)	(1,022)
Inventories	(1,407)	120
Prepaid expenses and other assets	79	191
Accounts payable	414	(530)
Accrued liabilities	(1,017)	1,239
Net cash used in operating activities	(2,473)	(1,548)
Cash flows from investing activities
Purchases of product license rights	(1,868)	0
Purchases of property and equipment	(14)	0
Net cash used in investing activities	(1,882)	0
Cash flows from financing activities
Repayment of long-term debt	(385)	0
Proceeds from stock option exercises	7	132
Payment of tax withholding related to net share settlement of stock option exercises	0	(181)
Net cash used in financing activities	(378)	(49)
Change in cash and cash equivalents	(4,733)	(1,597)
Cash and cash equivalents at beginning of period	21,388	16,305
Cash and cash equivalents at end of period	16,655	14,708
Supplemental disclosures of cash flow information
Cash paid for interest	190	216
Cash paid for income taxes	$ 0	$ 0